title
Socket Chatroom client - Creating chat application with sockets in Python

description
Welcome to part 5 of the sockets tutorial, in this tutorial we're going to build the client's code for our chatroom application. Text-based tutorials and sample code: https://pythonprogramming.net/client-chatroom-sockets-tutorial-python-3/ Channel membership: https://www.youtube.com/channel/UCfzlCWGWYyIQ0aLC5w48gBQ/join Discord: https://discord.gg/sentdex Support the content: https://pythonprogramming.net/support-donate/ Twitter: https://twitter.com/sentdex Facebook: https://www.facebook.com/pythonprogramming.net/ Twitch: https://www.twitch.tv/sentdex G+: https://plus.google.com/+sentdex

detail
{'title': 'Socket Chatroom client - Creating chat application with sockets in Python', 'heatmap': [{'end': 1043.036, 'start': 986.182, 'weight': 0.77}, {'end': 1221.631, 'start': 1183.671, 'weight': 0.815}, {'end': 1262.204, 'start': 1245.576, 'weight': 0.854}], 'summary': 'Tutorial series covers creating a chat application with sockets in python, including client-side coding, socket connection establishment, error handling, encoding usernames, receiving user messages, and python server-client interaction. it emphasizes console usage, non-blocking receive functionality, and adherence to pep8 guidelines.', 'chapters': [{'end': 86.935, 'segs': [{'end': 86.935, 'src': 'embed', 'start': 1.816, 'weight': 0, 'content': [{'end': 6.697, 'text': "What's going on everybody? Welcome to part five of the sockets tutorial series.", 'start': 1.816, 'duration': 4.881}, {'end': 11.219, 'text': "In this video, we're going to do is continue with our chat room application.", 'start': 6.917, 'duration': 4.302}, {'end': 18.901, 'text': "And this time we're going to code the client side of things and then we're going to run it and fix all of these certain bugs that I've created,", 'start': 11.419, 'duration': 7.482}, {'end': 20.482, 'text': 'or at least Some of them.', 'start': 18.901, 'duration': 1.581}, {'end': 22.624, 'text': 'The ones that we find.', 'start': 21.783, 'duration': 0.841}, {'end': 24.166, 'text': "Okay, let's get started.", 'start': 23.105, 'duration': 1.061}, {'end': 29.393, 'text': 'So what does our client do? Our client really does like two things, right? Or maybe three things.', 'start': 24.266, 'duration': 5.127}, {'end': 33.998, 'text': 'So on immediate connection, the client tells the server what their username is.', 'start': 29.453, 'duration': 4.545}, {'end': 41.422, 'text': "And then from that point forward, it's just like this infinite loop of if you, the client, has a message to send,", 'start': 35.14, 'duration': 6.282}, {'end': 45.524, 'text': 'send that message but also receive messages from the server.', 'start': 41.422, 'duration': 4.102}, {'end': 50.265, 'text': "Now, just to keep it super simple, we're going to do everything inside of the console.", 'start': 46.124, 'duration': 4.141}, {'end': 55.327, 'text': "Uh, so we're just going to use input, which is going to block the rest of the program from running.", 'start': 51.245, 'duration': 4.082}, {'end': 58.668, 'text': "So you'll have to either send an empty message or send a message to get updates.", 'start': 55.407, 'duration': 3.261}, {'end': 61.131, 'text': 'Later, I would add some sort of UI to it.', 'start': 59.168, 'duration': 1.963}, {'end': 65.236, 'text': "I do have planned to do that, but that's not really a sockets tutorial anymore.", 'start': 61.892, 'duration': 3.344}, {'end': 67.2, 'text': "That's a GUI tutorial.", 'start': 65.297, 'duration': 1.903}, {'end': 69.723, 'text': "So anyway, let's get started.", 'start': 67.28, 'duration': 2.443}, {'end': 75.692, 'text': 'So import socket because obviously import select for the same reason as before.', 'start': 69.883, 'duration': 5.809}, {'end': 78.173, 'text': 'And import Erno.', 'start': 76.312, 'duration': 1.861}, {'end': 80.573, 'text': 'So that should be everything we need.', 'start': 78.333, 'duration': 2.24}, {'end': 85.455, 'text': "What is Erno? What are we doing? We're going to use this to match specific error codes.", 'start': 80.673, 'duration': 4.782}, {'end': 86.935, 'text': "We'll talk about it when we get there.", 'start': 85.475, 'duration': 1.46}], 'summary': 'Continuing chat room application, coding client side to handle user connections and messages.', 'duration': 85.119, 'max_score': 1.816, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/ytu2yV3Gn1I/pics/ytu2yV3Gn1I1816.jpg'}], 'start': 1.816, 'title': 'Socket tutorial: client-side coding', 'summary': 'Introduces client-side coding for a chat room application, emphasizing console use for simplicity and planned ui inclusion. it is part five of the sockets tutorial series.', 'chapters': [{'end': 86.935, 'start': 1.816, 'title': 'Socket tutorial: client-side coding', 'summary': "Introduces the client-side coding for a chat room application, explaining the client's responsibilities and plans for future developments, emphasizing the use of console for simplicity and the planned inclusion of a ui. the tutorial is part five of the sockets tutorial series.", 'duration': 85.119, 'highlights': ['The tutorial is part five of the sockets tutorial series, focusing on coding the client side of a chat room application.', 'The client initially informs the server about their username and then engages in an infinite loop of sending and receiving messages.', 'The use of console for simplicity is emphasized, with a future plan to add a UI for the application.', "The tutorial introduces the use of 'import socket', 'import select', and 'import Erno' for specific error code matching."]}], 'duration': 85.119, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/ytu2yV3Gn1I/pics/ytu2yV3Gn1I1816.jpg', 'highlights': ['The tutorial is part five of the sockets tutorial series, focusing on coding the client side of a chat room application.', 'The client initially informs the server about their username and then engages in an infinite loop of sending and receiving messages.', 'The use of console for simplicity is emphasized, with a future plan to add a UI for the application.', "The tutorial introduces the use of 'import socket', 'import select', and 'import Erno' for specific error code matching."]}, {'end': 255.093, 'segs': [{'end': 129.4, 'src': 'embed', 'start': 87.015, 'weight': 1, 'content': [{'end': 93.937, 'text': "But basically, one of the things that we're going to do is try to receive messages until we can't.", 'start': 87.015, 'duration': 6.922}, {'end': 97.798, 'text': "But when we know we can't receive them, we actually will get an error.", 'start': 93.997, 'duration': 3.801}, {'end': 102.203, 'text': 'and we want to make sure that error is a really specific error and not some other error.', 'start': 98.178, 'duration': 4.025}, {'end': 107.229, 'text': "okay, so we want to make sure that error is because there's no message to receive and not because, who knows,", 'start': 102.203, 'duration': 5.026}, {'end': 109.551, 'text': 'something was wrong with that message or our code or whatever.', 'start': 107.229, 'duration': 2.322}, {'end': 112.795, 'text': "so anyways, we're gonna use this uh to match specific errors.", 'start': 109.551, 'duration': 3.244}, {'end': 113.876, 'text': "uh, you'll see it when we get there.", 'start': 112.795, 'duration': 1.081}, {'end': 118.578, 'text': "Then we're going to have the exact same starting constants.", 'start': 114.537, 'duration': 4.041}, {'end': 121.859, 'text': "Header length, we'll make that 10.", 'start': 118.598, 'duration': 3.261}, {'end': 125.139, 'text': 'IP will be the same as it was before, 127.0.0.1.', 'start': 121.859, 'duration': 3.28}, {'end': 126.56, 'text': "Port, we'll make that 1, 2, 3, 4 again.", 'start': 125.139, 'duration': 1.421}, {'end': 129.4, 'text': 'And then my usernamer will be input.', 'start': 126.58, 'duration': 2.82}], 'summary': 'Setting up error-handling for message reception, using specific constants and parameters.', 'duration': 42.385, 'max_score': 87.015, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/ytu2yV3Gn1I/pics/ytu2yV3Gn1I87015.jpg'}, {'end': 238.058, 'src': 'embed', 'start': 208.411, 'weight': 0, 'content': [{'end': 210.852, 'text': 'so, like i said before, this does like three major things.', 'start': 208.411, 'duration': 2.441}, {'end': 214.915, 'text': "the very first thing that we're going to do is send in that username for the server.", 'start': 210.852, 'duration': 4.063}, {'end': 223.099, 'text': 'so recall, um, somewhere here i was hoping to user equals.', 'start': 214.915, 'duration': 8.184}, {'end': 224.76, 'text': 'receives this the first message?', 'start': 223.099, 'duration': 1.661}, {'end': 227.809, 'text': 'yeah, if notified.', 'start': 224.76, 'duration': 3.049}, {'end': 230.631, 'text': 'Yeah So if this is the server socket, this is the brand new user.', 'start': 227.829, 'duration': 2.802}, {'end': 234.014, 'text': 'And then this is where we set that user and stuff like that.', 'start': 231.092, 'duration': 2.922}, {'end': 235.876, 'text': 'So like at this state, this is where we are.', 'start': 234.074, 'duration': 1.802}, {'end': 238.058, 'text': "Um, please don't move that.", 'start': 236.577, 'duration': 1.481}], 'summary': 'Three major tasks: send username, handle messages, set user data.', 'duration': 29.647, 'max_score': 208.411, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/ytu2yV3Gn1I/pics/ytu2yV3Gn1I208411.jpg'}], 'start': 87.015, 'title': 'Establishing socket connection and error handling', 'summary': 'Delves into establishing socket connection, setting error handling, and sending user information to the server, emphasizing specific error handling and non-blocking receive functionality.', 'chapters': [{'end': 255.093, 'start': 87.015, 'title': 'Socket connection and error handling', 'summary': 'Discusses the process of establishing a socket connection, setting specific error handling, and sending user information to the server, with a focus on making the error handling specific and avoiding blocking during the receive functionality.', 'duration': 168.078, 'highlights': ['The chapter discusses the process of establishing a socket connection, setting specific error handling, and sending user information to the server. Socket connection, error handling, sending user information', 'The error handling is emphasized to ensure specific error messages and avoid blocking during the receive functionality. Emphasis on specific error messages, avoiding blocking during receive', 'Specific constants such as header length, IP, and port are defined for the socket connection. Defining specific constants for the socket connection']}], 'duration': 168.078, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/ytu2yV3Gn1I/pics/ytu2yV3Gn1I87015.jpg', 'highlights': ['The chapter discusses the process of establishing a socket connection, setting specific error handling, and sending user information to the server.', 'The error handling is emphasized to ensure specific error messages and avoid blocking during the receive functionality.', 'Specific constants such as header length, IP, and port are defined for the socket connection.']}, {'end': 565.392, 'segs': [{'end': 387.443, 'src': 'embed', 'start': 299.634, 'weight': 0, 'content': [{'end': 301.095, 'text': "but anyways, i think that's good.", 'start': 299.634, 'duration': 1.461}, {'end': 304.816, 'text': 'so we will encode utf-8.', 'start': 301.095, 'duration': 3.721}, {'end': 309.176, 'text': "OK, that's our username in the header.", 'start': 306.795, 'duration': 2.381}, {'end': 322.82, 'text': "So now what we're going to do is client underscore socket dot send username header plus whatever that username is.", 'start': 309.596, 'duration': 13.224}, {'end': 328.342, 'text': 'Is that really not a PEP8 violation??', 'start': 326.741, 'duration': 1.601}, {'end': 330.982, 'text': 'And what, if I put the space?', 'start': 329.942, 'duration': 1.04}, {'end': 332.403, 'text': 'Is that going to be a PEP8 violation??', 'start': 331.022, 'duration': 1.381}, {'end': 335.884, 'text': 'No?, I can do whatever I want, huh?, Interesting.', 'start': 332.563, 'duration': 3.321}, {'end': 337.472, 'text': "Actually, I don't know the answer to that.", 'start': 336.451, 'duration': 1.021}, {'end': 340.255, 'text': "I think you'd probably want spaces around your pluses.", 'start': 337.592, 'duration': 2.663}, {'end': 342.998, 'text': "That's my guess.", 'start': 342.457, 'duration': 0.541}, {'end': 345.52, 'text': 'Anyway, so we send in that information.', 'start': 343.798, 'duration': 1.722}, {'end': 349.524, 'text': "Once we've done that, that's like the only thing that isn't going to be in the loop.", 'start': 346.241, 'duration': 3.283}, {'end': 351.306, 'text': 'Like we only need that information one time.', 'start': 349.544, 'duration': 1.762}, {'end': 353.448, 'text': "We're just not going to let people change their username.", 'start': 351.326, 'duration': 2.122}, {'end': 357.392, 'text': "So the next thing that we're going to do now is just iterate forever.", 'start': 354.629, 'duration': 2.763}, {'end': 359.194, 'text': 'So while true.', 'start': 358.053, 'duration': 1.141}, {'end': 370.665, 'text': 'while true, what we want to do here is both send messages and receive messages.', 'start': 362.218, 'duration': 8.447}, {'end': 377.55, 'text': "so the first thing I'm gonna do here is say any message that we input is just gonna be an F string.", 'start': 370.665, 'duration': 6.885}, {'end': 379.011, 'text': "that's also, whoops.", 'start': 377.55, 'duration': 1.461}, {'end': 387.443, 'text': "input f string and then we'll just say uh, the username, so my underscore username.", 'start': 379.011, 'duration': 8.432}], 'summary': 'Code encodes username in utf-8, sends messages, and iterates indefinitely.', 'duration': 87.809, 'max_score': 299.634, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/ytu2yV3Gn1I/pics/ytu2yV3Gn1I299634.jpg'}, {'end': 447.813, 'src': 'embed', 'start': 412.364, 'weight': 4, 'content': [{'end': 414.726, 'text': 'So someone might, or they might accidentally hit enter.', 'start': 412.364, 'duration': 2.362}, {'end': 420.753, 'text': 'Who knows? Uh, so what we want to do is be able to handle for whether or not someone actually input anything at all.', 'start': 414.746, 'duration': 6.007}, {'end': 423.917, 'text': "So the first thing that we're going to ask is if message.", 'start': 421.414, 'duration': 2.503}, {'end': 425.719, 'text': 'So if this is not empty.', 'start': 424.137, 'duration': 1.582}, {'end': 427.883, 'text': 'There we go.', 'start': 427.503, 'duration': 0.38}, {'end': 436.968, 'text': 'If, if message, then message will be equal to message dot encode, and we will encode that to UTF eight bytes.', 'start': 428.183, 'duration': 8.785}, {'end': 447.813, 'text': "And then what we're going to do is, uh, we need to set message header message header, and that's equal to the F string of again, Len.", 'start': 437.528, 'duration': 10.285}], 'summary': 'Handling input validation and encoding for message handling.', 'duration': 35.449, 'max_score': 412.364, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/ytu2yV3Gn1I/pics/ytu2yV3Gn1I412364.jpg'}], 'start': 256.233, 'title': 'Encoding usernames and creating a chat application with python', 'summary': 'Discusses encoding usernames using utf-8 and sending user information via client_socket, emphasizing pep8 guidelines and the necessity of the username information only once. it also outlines the process of sending and receiving messages in a python chat application, including handling user input, encoding messages to utf-8 bytes, and preparing to receive and handle incoming messages indefinitely in a while true loop.', 'chapters': [{'end': 353.448, 'start': 256.233, 'title': 'Encoding usernames and sending data', 'summary': 'Discusses encoding usernames using utf-8 and sending the user information via client_socket, with emphasis on pep8 guidelines and the necessity of the username information only once.', 'duration': 97.215, 'highlights': ['The chapter emphasizes encoding the username using UTF-8 and sending the user information via client_socket.', 'Discussion about adhering to PEP8 guidelines while working with the code.', 'Emphasis on the necessity of the username information only once and preventing users from changing their username.']}, {'end': 565.392, 'start': 354.629, 'title': 'Creating a chat application with python', 'summary': 'Outlines the process of sending and receiving messages in a python chat application, including handling user input and encoding messages to utf-8 bytes, while also preparing to receive and handle incoming messages indefinitely in a while true loop.', 'duration': 210.763, 'highlights': ['The chapter outlines the process of sending and receiving messages in a Python chat application, including handling user input and encoding messages to UTF-8 bytes, while also preparing to receive and handle incoming messages indefinitely in a while true loop.', "The code implements logic to handle user input, including setting up the message format with the user's username and encoding it to UTF-8 bytes, ensuring a seamless chat experience.", 'The chapter emphasizes the need to handle scenarios where users might press enter without typing a message, requiring the application to check if the message is empty and handle it appropriately.']}], 'duration': 309.159, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/ytu2yV3Gn1I/pics/ytu2yV3Gn1I256233.jpg', 'highlights': ['Emphasis on encoding the username using UTF-8 and sending user information via client_socket', 'Discussion about adhering to PEP8 guidelines while working with the code', 'Outlining the process of sending and receiving messages in a Python chat application, including handling user input and encoding messages to UTF-8 bytes', 'Emphasis on the necessity of the username information only once and preventing users from changing their username', "Implementing logic to handle user input, including setting up the message format with the user's username and encoding it to UTF-8 bytes", 'Emphasis on handling scenarios where users might press enter without typing a message, requiring the application to check if the message is empty and handle it appropriately']}, {'end': 988.705, 'segs': [{'end': 704.435, 'src': 'embed', 'start': 565.392, 'weight': 0, 'content': [{'end': 568.334, 'text': 'uh, but while true, we are going to attempt to receive things.', 'start': 565.392, 'duration': 2.942}, {'end': 583.147, 'text': "so first of all, uh, we're going to say username underscore header equals client socket dot, receive header length And then, if not,", 'start': 568.334, 'duration': 14.813}, {'end': 585.848, 'text': 'len username header.', 'start': 583.147, 'duration': 2.701}, {'end': 586.809, 'text': 'whoops, hey man.', 'start': 585.848, 'duration': 0.961}, {'end': 593.732, 'text': "If not len username header means we basically didn't get any data for whatever reason.", 'start': 587.829, 'duration': 5.903}, {'end': 601.995, 'text': "We're going to say print connection closed by the server.", 'start': 594.252, 'duration': 7.743}, {'end': 609.038, 'text': 'And then we run sys.exit and import sys.', 'start': 603.135, 'duration': 5.903}, {'end': 621.45, 'text': 'OK, so other than that, we want to convert that username header to an int.', 'start': 613.607, 'duration': 7.843}, {'end': 635.556, 'text': "So what we're going to say is username underscore length equals the int value of username header dot decode utf-8.", 'start': 622.09, 'duration': 13.466}, {'end': 641.398, 'text': "And then again, like before, we'll throw in a strip because normally you'd have to do that.", 'start': 637.036, 'duration': 4.362}, {'end': 642.779, 'text': "But I don't think you do here.", 'start': 641.498, 'duration': 1.281}, {'end': 647.1, 'text': "uh, username length okay, so we've got the username length.", 'start': 643.699, 'duration': 3.401}, {'end': 649.1, 'text': 'now what we want to grab?', 'start': 647.1, 'duration': 2}, {'end': 653.961, 'text': 'knowing that header, you know what the length of this message of username alone would be.', 'start': 649.1, 'duration': 4.861}, {'end': 659.662, 'text': 'uh, we can actually grab the user name here.', 'start': 653.961, 'duration': 5.701}, {'end': 662.443, 'text': "so that's going to be client socket dot.", 'start': 659.662, 'duration': 2.781}, {'end': 671.845, 'text': 'receive username length dot, d code utf-8, utf-8.', 'start': 662.443, 'duration': 9.402}, {'end': 677.402, 'text': "okay, so we've got the username.", 'start': 674.921, 'duration': 2.481}, {'end': 683.284, 'text': 'now all what we need to get next is the message itself.', 'start': 677.402, 'duration': 5.882}, {'end': 689.487, 'text': "so, coming down here, recall, when we send information we're sending this right.", 'start': 683.284, 'duration': 6.203}, {'end': 696.75, 'text': "we're sending the, the user, the user header, followed by the username, and the header just contains how long is the username?", 'start': 689.487, 'duration': 7.263}, {'end': 704.435, 'text': "And then, in that exact same message here, but just right after it, we're going to receive the message header and data.", 'start': 697.63, 'duration': 6.805}], 'summary': 'Receiving and processing data from client using python sockets.', 'duration': 139.043, 'max_score': 565.392, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/ytu2yV3Gn1I/pics/ytu2yV3Gn1I565392.jpg'}, {'end': 988.705, 'src': 'embed', 'start': 868.53, 'weight': 3, 'content': [{'end': 886.546, 'text': "so except, uh, we'll just do exception as e and then we'll just uh, print uh, string e, um and we'll call this just general error.", 'start': 868.53, 'duration': 18.016}, {'end': 891.025, 'text': 'um, sys.exit.', 'start': 886.546, 'duration': 4.479}, {'end': 907.715, 'text': "Then we'll come down here, and we're going to accept an IO error as E, except IO error, capital E.", 'start': 891.045, 'duration': 16.67}, {'end': 908.596, 'text': 'I was waiting for the color.', 'start': 907.715, 'duration': 0.881}, {'end': 911.818, 'text': 'Okay, except IO error as E.', 'start': 909.156, 'duration': 2.662}, {'end': 919.985, 'text': "Now, if E dot erno is not equal, so we've got two options here that we might see.", 'start': 911.818, 'duration': 8.167}, {'end': 938.318, 'text': 'It would be erno dot E again, and then, if E does not equal that or So again.', 'start': 920.005, 'duration': 18.313}, {'end': 946.083, 'text': 'these are the errors that we might see, depending on operating system, when there are no more messages to be received.', 'start': 938.318, 'duration': 7.765}, {'end': 955.268, 'text': "So in this case, we are, we're like, we don't really want to handle for this necessarily because, um, we're expecting this.", 'start': 946.923, 'duration': 8.345}, {'end': 967.976, 'text': "So it, but if it's not one of these things, um, then we'll just say print, uh, string E and we'll just say some sort of reading error.", 'start': 955.348, 'duration': 12.628}, {'end': 975.44, 'text': 'Uh, and then whatever string E is that way we know, uh, where we hit an issue.', 'start': 967.996, 'duration': 7.444}, {'end': 978.954, 'text': "And then also let's just run a sys exit here because we're done.", 'start': 975.851, 'duration': 3.103}, {'end': 985.602, 'text': "So otherwise, if we hit it and it is one of these things, we don't care.", 'start': 979.755, 'duration': 5.847}, {'end': 988.705, 'text': 'All we really want to do is continue.', 'start': 986.182, 'duration': 2.523}], 'summary': 'Handling io error and general error, with sys.exit on completion.', 'duration': 120.175, 'max_score': 868.53, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/ytu2yV3Gn1I/pics/ytu2yV3Gn1I868530.jpg'}], 'start': 565.392, 'title': 'Receiving data and user messages', 'summary': 'Covers receiving data from the server, converting username header to an integer, handling cases of no data received, using len() and decoding utf-8. it also explains receiving and handling user messages, including extraction of username and message data based on specific headers and lengths, while addressing potential exceptions and errors.', 'chapters': [{'end': 642.779, 'start': 565.392, 'title': 'Server data reception', 'summary': 'Covers the process of receiving data from the server, including converting username header to an integer and handling cases where no data is received, with examples of using len() and decoding utf-8, and the use of sys.exit for connection closure.', 'duration': 77.387, 'highlights': ['The process of receiving data from the server is outlined, including converting username header to an integer and handling cases where no data is received.', 'The use of len() to check for the length of the username header is demonstrated, ensuring data reception.', 'The example of converting username header to an integer using the int value of username header dot decode utf-8 is given, illustrating data manipulation.', 'The use of sys.exit for closing the connection is mentioned, ensuring proper closure in case of no data reception.']}, {'end': 988.705, 'start': 643.699, 'title': 'Receiving and handling user messages', 'summary': 'Explains the process of receiving and handling user messages, including the extraction of username and message data based on specific headers and lengths, while addressing potential exceptions and errors.', 'duration': 345.006, 'highlights': ['The process involves extracting username and message data based on specific headers and lengths. The chapter details the extraction of username and message data based on specific headers and lengths.', 'Addressing potential exceptions and errors during the message receiving process. The chapter discusses handling potential exceptions and errors, including IO errors and general errors.', 'Utilizing the sys.exit function to handle exceptions and errors. The chapter explains the use of the sys.exit function for handling exceptions and errors.']}], 'duration': 423.313, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/ytu2yV3Gn1I/pics/ytu2yV3Gn1I565392.jpg', 'highlights': ['The process of receiving data from the server is outlined, including converting username header to an integer and handling cases where no data is received.', 'The process involves extracting username and message data based on specific headers and lengths. The chapter details the extraction of username and message data based on specific headers and lengths.', 'The use of len() to check for the length of the username header is demonstrated, ensuring data reception.', 'Addressing potential exceptions and errors during the message receiving process. The chapter discusses handling potential exceptions and errors, including IO errors and general errors.', 'The example of converting username header to an integer using the int value of username header dot decode utf-8 is given, illustrating data manipulation.', 'Utilizing the sys.exit function to handle exceptions and errors. The chapter explains the use of the sys.exit function for handling exceptions and errors.', 'The use of sys.exit for closing the connection is mentioned, ensuring proper closure in case of no data reception.']}, {'end': 1368.267, 'segs': [{'end': 1096.831, 'src': 'embed', 'start': 1064.963, 'weight': 0, 'content': [{'end': 1071.347, 'text': "So we said hello world, server didn't actually see it, but we're actually checking for the read.", 'start': 1064.963, 'duration': 6.384}, {'end': 1077.091, 'text': "Okay, so the issue is, yeah, in this case, it's not an either or situation.", 'start': 1071.827, 'duration': 5.264}, {'end': 1079.592, 'text': "It's an and situation.", 'start': 1077.111, 'duration': 2.481}, {'end': 1087.664, 'text': "So if you put an or here, obviously you're always going to get it.", 'start': 1084.201, 'duration': 3.463}, {'end': 1090.586, 'text': 'So instead it needs to be an and.', 'start': 1089.205, 'duration': 1.381}, {'end': 1096.831, 'text': "So if the error is not this and it's not this, then we go here.", 'start': 1090.966, 'duration': 5.865}], 'summary': "Issue: switch 'or' to 'and' for error checking.", 'duration': 31.868, 'max_score': 1064.963, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/ytu2yV3Gn1I/pics/ytu2yV3Gn1I1064963.jpg'}, {'end': 1221.631, 'src': 'heatmap', 'start': 1183.671, 'weight': 0.815, 'content': [{'end': 1192.397, 'text': 'Uh, we could just say, um, Message equals that.', 'start': 1183.671, 'duration': 8.726}, {'end': 1194.419, 'text': 'Maybe get away with that.', 'start': 1193.578, 'duration': 0.841}, {'end': 1200.283, 'text': 'Python client.py.', 'start': 1196.741, 'duration': 3.542}, {'end': 1202.965, 'text': "We'll call this user reader.", 'start': 1201.304, 'duration': 1.661}, {'end': 1205.147, 'text': "And then we'll come back over here.", 'start': 1203.245, 'duration': 1.902}, {'end': 1207.829, 'text': 'And now I actually bring the messages back.', 'start': 1205.167, 'duration': 2.662}, {'end': 1214.006, 'text': 'is the python client dot pi c.', 'start': 1208.602, 'duration': 5.404}, {'end': 1217.989, 'text': 'hey there, um, so this here.', 'start': 1214.006, 'duration': 3.983}, {'end': 1221.631, 'text': 'obviously our server basically does it, but this would just clean it up a little bit,', 'start': 1217.989, 'duration': 3.642}], 'summary': 'Using python client.py to clean up server messages.', 'duration': 37.96, 'max_score': 1183.671, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/ytu2yV3Gn1I/pics/ytu2yV3Gn1I1183671.jpg'}, {'end': 1276.833, 'src': 'heatmap', 'start': 1245.576, 'weight': 0.854, 'content': [{'end': 1248.898, 'text': "Then you get hey, what's up?, Nothing much.", 'start': 1245.576, 'duration': 3.322}, {'end': 1251.919, 'text': 'Anyway, you get the idea.', 'start': 1250.038, 'duration': 1.881}, {'end': 1262.204, 'text': "So actually, really surprised that I didn't typo anything along the way, and those funky F strings worked on the server, so that's cool.", 'start': 1252.039, 'duration': 10.165}, {'end': 1265.266, 'text': "Okay, so really, that's it.", 'start': 1263.525, 'duration': 1.741}, {'end': 1271.209, 'text': 'The next thing you would do is make some sort of real UI and not actually use the command line, just because..', 'start': 1265.766, 'duration': 5.443}, {'end': 1276.833, 'text': 'It actually really is difficult to put things into the command line and have that be updated live.', 'start': 1271.909, 'duration': 4.924}], 'summary': 'Successfully implemented f strings on the server without typos, and considering transitioning to a real ui due to difficulty updating live in the command line.', 'duration': 31.257, 'max_score': 1245.576, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/ytu2yV3Gn1I/pics/ytu2yV3Gn1I1245576.jpg'}, {'end': 1296.989, 'src': 'embed', 'start': 1271.909, 'weight': 1, 'content': [{'end': 1276.833, 'text': 'It actually really is difficult to put things into the command line and have that be updated live.', 'start': 1271.909, 'duration': 4.924}, {'end': 1283.339, 'text': "Yes, there are ways, but it's all operating system specific and I just didn't want to do that that much.", 'start': 1277.113, 'duration': 6.226}, {'end': 1288.483, 'text': 'Whereas you could use something like any GUI, you know, like Tkinter or PyQt or whatever.', 'start': 1283.399, 'duration': 5.084}, {'end': 1291.605, 'text': "And you just wouldn't have that problem anyways.", 'start': 1290.104, 'duration': 1.501}, {'end': 1296.989, 'text': "So yeah, I think that's probably the next step would be to do something in a UI instead.", 'start': 1291.685, 'duration': 5.304}], 'summary': 'Command line updates are difficult, ui is easier. consider using tkinter or pyqt.', 'duration': 25.08, 'max_score': 1271.909, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/ytu2yV3Gn1I/pics/ytu2yV3Gn1I1271909.jpg'}, {'end': 1365.185, 'src': 'embed', 'start': 1315.8, 'weight': 2, 'content': [{'end': 1316.761, 'text': "that's a really long time.", 'start': 1315.8, 'duration': 0.961}, {'end': 1319.402, 'text': 'thank you very much, chong sam park.', 'start': 1316.761, 'duration': 2.641}, {'end': 1320.242, 'text': 'uh, new member.', 'start': 1319.402, 'duration': 0.84}, {'end': 1322.983, 'text': 'thank you, lily z, also a new member.', 'start': 1320.242, 'duration': 2.741}, {'end': 1326.244, 'text': 'a you mix, also a new member.', 'start': 1322.983, 'duration': 3.261}, {'end': 1327.925, 'text': 'i sort of recognize that name.', 'start': 1326.244, 'duration': 1.681}, {'end': 1330.086, 'text': "i think that that you're in discord or something.", 'start': 1327.925, 'duration': 2.161}, {'end': 1331.826, 'text': "that's probably why i recognize that name.", 'start': 1330.086, 'duration': 1.74}, {'end': 1334.447, 'text': 'dave senta four months as well.', 'start': 1331.826, 'duration': 2.621}, {'end': 1337.148, 'text': 'thank you very much, all of you guys, for your support.', 'start': 1334.447, 'duration': 2.701}, {'end': 1338.429, 'text': 'you guys are freaking amazing.', 'start': 1337.148, 'duration': 1.281}, {'end': 1342.051, 'text': 'Okay, questions, comments, yeah, all that below.', 'start': 1339.829, 'duration': 2.222}, {'end': 1345.673, 'text': 'If you got suggestions, anything I did wrong here, leave those below.', 'start': 1342.091, 'duration': 3.582}, {'end': 1357.34, 'text': "Also, if you can think of a nice, clean way to make this operating system agnostic, but also update live, including message input, I'd love to see it.", 'start': 1346.213, 'duration': 11.127}, {'end': 1362.783, 'text': "I just, it's like a huge rabbit hole that I don't really want to go down for this.", 'start': 1358.101, 'duration': 4.682}, {'end': 1365.185, 'text': "But anyway, that's it.", 'start': 1363.224, 'duration': 1.961}], 'summary': 'Acknowledging new members and thanking for support. seeking suggestions for making the operating system agnostic and live updating.', 'duration': 49.385, 'max_score': 1315.8, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/ytu2yV3Gn1I/pics/ytu2yV3Gn1I1315800.jpg'}], 'start': 989.766, 'title': 'Python server and client interaction', 'summary': "Explores running a python server and client, troubleshooting connection errors, and demonstrating successful message exchanges, emphasizing the use of 'and' for error conditions and suggesting a transition to a real ui for seamless interaction.", 'chapters': [{'end': 1368.267, 'start': 989.766, 'title': 'Python server and client interaction', 'summary': "Explores the process of running a python server and client, troubleshooting connection errors, and demonstrating successful message exchanges, highlighting the importance of using 'and' instead of 'or' for error conditions, with a suggestion to transition to a real ui for seamless interaction.", 'duration': 378.501, 'highlights': ["The server and client interaction process is demonstrated, showcasing successful message exchanges and troubleshooting connection errors, emphasizing the significance of using 'and' instead of 'or' for error conditions, ultimately achieving successful communication.", 'The suggestion to transition to a real UI for seamless interaction is made, highlighting the challenges of updating live command line interfaces and proposing the use of UI frameworks like Tkinter or PyQt.', 'Acknowledgment and gratitude are expressed to recent channel members for their continued support, fostering a sense of community engagement and appreciation.', 'An invitation for questions, comments, and suggestions is extended, along with a request for ideas on making the system agnostic and enabling live updates, while acknowledging the complexities involved in such a pursuit.']}], 'duration': 378.501, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/ytu2yV3Gn1I/pics/ytu2yV3Gn1I989766.jpg', 'highlights': ["The server and client interaction process is demonstrated, showcasing successful message exchanges and troubleshooting connection errors, emphasizing the significance of using 'and' instead of 'or' for error conditions, ultimately achieving successful communication.", 'The suggestion to transition to a real UI for seamless interaction is made, highlighting the challenges of updating live command line interfaces and proposing the use of UI frameworks like Tkinter or PyQt.', 'Acknowledgment and gratitude are expressed to recent channel members for their continued support, fostering a sense of community engagement and appreciation.', 'An invitation for questions, comments, and suggestions is extended, along with a request for ideas on making the system agnostic and enabling live updates, while acknowledging the complexities involved in such a pursuit.']}], 'highlights': ["The tutorial introduces the use of 'import socket', 'import select', and 'import Erno' for specific error code matching.", 'The client initially informs the server about their username and then engages in an infinite loop of sending and receiving messages.', 'The use of console for simplicity is emphasized, with a future plan to add a UI for the application.', 'The chapter discusses the process of establishing a socket connection, setting specific error handling, and sending user information to the server.', 'Specific constants such as header length, IP, and port are defined for the socket connection.', 'Emphasis on encoding the username using UTF-8 and sending user information via client_socket', 'Discussion about adhering to PEP8 guidelines while working with the code', 'Outlining the process of sending and receiving messages in a Python chat application, including handling user input and encoding messages to UTF-8 bytes', 'Emphasis on the necessity of the username information only once and preventing users from changing their username', "Implementing logic to handle user input, including setting up the message format with the user's username and encoding it to UTF-8 bytes", 'Emphasis on handling scenarios where users might press enter without typing a message, requiring the application to check if the message is empty and handle it appropriately', 'The process of receiving data from the server is outlined, including converting username header to an integer and handling cases where no data is received.', 'The process involves extracting username and message data based on specific headers and lengths. The chapter details the extraction of username and message data based on specific headers and lengths.', 'The use of len() to check for the length of the username header is demonstrated, ensuring data reception.', 'Addressing potential exceptions and errors during the message receiving process. The chapter discusses handling potential exceptions and errors, including IO errors and general errors.', 'The example of converting username header to an integer using the int value of username header dot decode utf-8 is given, illustrating data manipulation.', 'Utilizing the sys.exit function to handle exceptions and errors. The chapter explains the use of the sys.exit function for handling exceptions and errors.', 'The use of sys.exit for closing the connection is mentioned, ensuring proper closure in case of no data reception.', "The server and client interaction process is demonstrated, showcasing successful message exchanges and troubleshooting connection errors, emphasizing the significance of using 'and' instead of 'or' for error conditions, ultimately achieving successful communication.", 'The suggestion to transition to a real UI for seamless interaction is made, highlighting the challenges of updating live command line interfaces and proposing the use of UI frameworks like Tkinter or PyQt.', 'Acknowledgment and gratitude are expressed to recent channel members for their continued support, fostering a sense of community engagement and appreciation.', 'An invitation for questions, comments, and suggestions is extended, along with a request for ideas on making the system agnostic and enabling live updates, while acknowledging the complexities involved in such a pursuit.']}