title
Python Tutorial for Absolute Beginners #1 - What Are Variables?

description
Learn Python programming with this Python tutorial for beginners! Tips: 1. Here is the playlist of this series: https://goo.gl/eVauVX 2. If you want to learn faster than I talk, I’d recommend 1.25x or 1.5x speed :) 3. Check the outline in the comment section below if you want to skip around. 4. Download the sample files here to follow along (they are Jupyter Notebook files): https://www.csdojo.io/python1 5. Have fun! If anything is unclear, please let me know in a comment. Keep in touch on Facebook: https://www.facebook.com/entercsdojo Subscribe to my newsletter: https://www.csdojo.io/news Support me on Patreon: https://www.patreon.com/csdojo Outline (check the comment section for a clickable version): 0:00 : Introduction 0:17 : Who’s this tutorial for? 0:30 : An outline of this video 1:18 : What is Python and what can you do with it? 2:01 : What is IDE and why I chose Jupyter Notebook 3:09 : How Jupyter Notebook works 4:19 : How to install Python and Jupyter (through Anaconda) 5:58 : Launching Jupyter 7:59 : The print() function 10:24 : Introduction to variables 13:08 : What are variables (in Python)? 16:42 : Assigning a variable to another variable 19:03 : A practice problem - swapping two variables 20:40 : Solutions to the practice problem - swapping two variables

detail
{'title': 'Python Tutorial for Absolute Beginners #1 - What Are Variables?', 'heatmap': [{'end': 403.753, 'start': 353.934, 'weight': 1}, {'end': 462.304, 'start': 411.694, 'weight': 0.714}], 'summary': 'The python tutorial for absolute beginners series covers the basics of python programming, installation process, jupyter notebook setup, introduction to python variables, variable reassignment, and efficient solutions for variable swapping.', 'chapters': [{'end': 62.802, 'segs': [{'end': 62.802, 'src': 'embed', 'start': 0.149, 'weight': 0, 'content': [{'end': 8.655, 'text': "Hey everyone, my name is YK, and I'm the founder of this YouTube channel, CS Dojo, and I'm also a former software developer at Google.", 'start': 0.149, 'duration': 8.506}, {'end': 13.558, 'text': 'And this is my new series Python Tutorial for Absolute Beginners.', 'start': 9.215, 'duration': 4.343}, {'end': 16.2, 'text': 'and this is my video number one What are Variables?', 'start': 13.558, 'duration': 2.642}, {'end': 22.504, 'text': "So this series is going to be good for complete beginners who've never done any programming before,", 'start': 17.06, 'duration': 5.444}, {'end': 29.629, 'text': "as well as someone who's done some programming before, whether it's Python or any other language, but wants to learn more about Python.", 'start': 22.504, 'duration': 7.125}, {'end': 33.212, 'text': "So in this video, I'm going to go through a number of different things.", 'start': 30.369, 'duration': 2.843}, {'end': 36.275, 'text': 'First of all, what is Python and what can you do with it?', 'start': 33.733, 'duration': 2.542}, {'end': 43.062, 'text': "And then I'm going to explain how to install Python on your computer and then set up a development environment.", 'start': 36.836, 'duration': 6.226}, {'end': 46.185, 'text': "We're going to use something called Jupyter Notebook throughout this series.", 'start': 43.543, 'duration': 2.642}, {'end': 53.132, 'text': "and then i'm going to explain how to use the print function and what are variables and how to use them.", 'start': 47.046, 'duration': 6.086}, {'end': 58.158, 'text': 'and by the end of this video, if you have two variables storing different things,', 'start': 53.132, 'duration': 5.026}, {'end': 62.802, 'text': "you'll be able to swap the content within those two variables with each other,", 'start': 58.158, 'duration': 4.644}], 'summary': 'Yk introduces python tutorial for absolute beginners on cs dojo channel, covering variables and basic python concepts.', 'duration': 62.653, 'max_score': 0.149, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/Z1Yd7upQsXY/pics/Z1Yd7upQsXY149.jpg'}], 'start': 0.149, 'title': 'Python tutorial for absolute beginners', 'summary': 'Introduces the python tutorial for absolute beginners series, covering the basics of python programming for complete beginners and those with prior programming experience, and demonstrating the use of variables and the print function.', 'chapters': [{'end': 62.802, 'start': 0.149, 'title': 'Python tutorial for absolute beginners', 'summary': 'Introduces the python tutorial for absolute beginners series, covering the basics of python programming for complete beginners and those with prior programming experience, and demonstrating the use of variables and the print function.', 'duration': 62.653, 'highlights': ['The series is designed for complete beginners and those with some programming experience, aiming to teach Python programming.', 'The founder, YK, is a former software developer at Google and the creator of the CS Dojo YouTube channel.', 'The video covers topics such as Python introduction, installation, setting up a development environment, using the print function, and understanding variables.', 'The use of Jupyter Notebook is emphasized as the development environment for the series.', 'The demonstration includes the practical application of swapping content within two variables.']}], 'duration': 62.653, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/Z1Yd7upQsXY/pics/Z1Yd7upQsXY149.jpg', 'highlights': ['The series is designed for complete beginners and those with some programming experience, aiming to teach Python programming.', 'The video covers topics such as Python introduction, installation, setting up a development environment, using the print function, and understanding variables.', 'The use of Jupyter Notebook is emphasized as the development environment for the series.', 'The demonstration includes the practical application of swapping content within two variables.', 'The founder, YK, is a former software developer at Google and the creator of the CS Dojo YouTube channel.']}, {'end': 370.977, 'segs': [{'end': 124.7, 'src': 'embed', 'start': 82.439, 'weight': 0, 'content': [{'end': 90.946, 'text': "it's one of the most popular programming languages out there and it's used at smaller companies as well as larger companies, including google,", 'start': 82.439, 'duration': 8.507}, {'end': 96.35, 'text': 'and many universities use python as the introductory programming language in their computer science courses.', 'start': 90.946, 'duration': 5.404}, {'end': 103.232, 'text': "And one advantage of Python is that it's fairly easy to learn because it has fairly simple syntax.", 'start': 96.87, 'duration': 6.362}, {'end': 108.773, 'text': "It's used for many different applications, including website's backend code,", 'start': 104.132, 'duration': 4.641}, {'end': 115.615, 'text': "which is the code that runs on your server as opposed to the code that runs on your device, whether it's a phone or a laptop.", 'start': 108.773, 'duration': 6.842}, {'end': 120.757, 'text': "And it's also popular for data analysis and scientific research purposes.", 'start': 116.256, 'duration': 4.501}, {'end': 124.7, 'text': "Okay, so let's now go ahead and install Python on your computer.", 'start': 121.377, 'duration': 3.323}], 'summary': 'Python is widely used in companies and universities, known for its simple syntax, and popular for website backend, data analysis, and scientific research.', 'duration': 42.261, 'max_score': 82.439, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/Z1Yd7upQsXY/pics/Z1Yd7upQsXY82439.jpg'}, {'end': 201.745, 'src': 'embed', 'start': 177.416, 'weight': 3, 'content': [{'end': 188.68, 'text': "But I've decided to use Jupyter Notebook throughout this series because it's very simple and easy to install Jupyter Notebook through something called Anaconda and it's fairly easy to use as well.", 'start': 177.416, 'duration': 11.264}, {'end': 191.421, 'text': "So here's the way Jupyter Notebook works.", 'start': 189.5, 'duration': 1.921}, {'end': 194.622, 'text': 'There are two components to Jupyter Notebook.', 'start': 191.941, 'duration': 2.681}, {'end': 201.745, 'text': 'First of all, when you launch Jupyter Notebook on your computer, you might see a command line interface like this.', 'start': 195.462, 'duration': 6.283}], 'summary': 'Jupyter notebook is simple and easy to install using anaconda, with a user-friendly interface.', 'duration': 24.329, 'max_score': 177.416, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/Z1Yd7upQsXY/pics/Z1Yd7upQsXY177416.jpg'}, {'end': 289.913, 'src': 'embed', 'start': 264.922, 'weight': 4, 'content': [{'end': 270.585, 'text': 'Anaconda is something called a package manager, which allows you to install many programs at once.', 'start': 264.922, 'duration': 5.663}, {'end': 279.168, 'text': "This particular package manager, Anaconda, is actually used for installing math and science libraries, but you don't have to worry about that.", 'start': 271.385, 'duration': 7.783}, {'end': 285.471, 'text': 'The only thing you need to know is that when you install Anaconda, it comes with Python and Jupyter Notebook.', 'start': 279.468, 'duration': 6.003}, {'end': 289.913, 'text': "so you don't have to install Python or Jupyter Notebook separately on your computer.", 'start': 285.931, 'duration': 3.982}], 'summary': 'Anaconda is a package manager that includes python and jupyter notebook, used for installing math and science libraries.', 'duration': 24.991, 'max_score': 264.922, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/Z1Yd7upQsXY/pics/Z1Yd7upQsXY264922.jpg'}], 'start': 62.802, 'title': 'Python & jupyter notebook installation', 'summary': 'Provides an overview of python, its applications, installation process, and the use of jupyter notebook, highlighting its ease of use and popularity for data analysis. it also guides through the installation process using anaconda, ensuring python and jupyter notebook are installed seamlessly.', 'chapters': [{'end': 370.977, 'start': 62.802, 'title': 'Python & jupyter notebook installation', 'summary': 'Provides an overview of python, its applications, installation process, and the use of jupyter notebook, highlighting its ease of use and popularity for data analysis. it also guides through the installation process using anaconda, ensuring python and jupyter notebook are installed seamlessly.', 'duration': 308.175, 'highlights': ['Python is popular at smaller and larger companies, including Google, and is widely used in universities for computer science courses.', "Python's easy syntax makes it fairly easy to learn.", 'Python is used for website backend code and is popular for data analysis and scientific research.', 'Using Jupyter Notebook for writing and testing programs is highlighted for its simplicity and ease of installation through Anaconda.', 'Anaconda simplifies the installation process by including Python and Jupyter Notebook without the need for separate installations.']}], 'duration': 308.175, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/Z1Yd7upQsXY/pics/Z1Yd7upQsXY62802.jpg', 'highlights': ['Python is popular at smaller and larger companies, including Google, and is widely used in universities for computer science courses.', 'Python is used for website backend code and is popular for data analysis and scientific research.', "Python's easy syntax makes it fairly easy to learn.", 'Using Jupyter Notebook for writing and testing programs is highlighted for its simplicity and ease of installation through Anaconda.', 'Anaconda simplifies the installation process by including Python and Jupyter Notebook without the need for separate installations.']}, {'end': 792.067, 'segs': [{'end': 462.304, 'src': 'heatmap', 'start': 396.551, 'weight': 4, 'content': [{'end': 403.753, 'text': "and once you click it, you can see that my current location is desktop, because it's shown at the top right here.", 'start': 396.551, 'duration': 7.202}, {'end': 409.814, 'text': "before you create your first program here, i'd personally recommend that you create a new folder.", 'start': 403.753, 'duration': 6.061}, {'end': 411.694, 'text': 'so i just went to my desktop.', 'start': 409.814, 'duration': 1.88}, {'end': 415.355, 'text': 'i clicked right click and then new folder.', 'start': 411.694, 'duration': 3.661}, {'end': 420.854, 'text': "i'm going to call this folder python tutorial 1..", 'start': 415.355, 'duration': 5.499}, {'end': 425.375, 'text': 'And once you create that folder, you should see in the Jupyter Notebook interface 2,', 'start': 420.854, 'duration': 4.521}, {'end': 432.517, 'text': "click that and you'll see that the current location is Python tutorial 1 within desktop, right here at the top.", 'start': 425.375, 'duration': 7.142}, {'end': 443.42, 'text': 'To create a new file or a new notebook file, as they say, just click new at the top right hand corner and then click Python 3.', 'start': 433.117, 'duration': 10.303}, {'end': 445.26, 'text': 'So a new notebook has been created here.', 'start': 443.42, 'duration': 1.84}, {'end': 452.422, 'text': "Change the name of this notebook from Untitled to, let's say, what are our variables.", 'start': 445.881, 'duration': 6.541}, {'end': 453.782, 'text': 'Click Rename.', 'start': 453.182, 'duration': 0.6}, {'end': 462.304, 'text': "And once you do that, if you go back to desktop and the folder that we just created Python Tutorial 1, you'll see a new file.", 'start': 454.662, 'duration': 7.642}], 'summary': 'Creating a new folder and a python 3 notebook on desktop for a tutorial.', 'duration': 24.303, 'max_score': 396.551, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/Z1Yd7upQsXY/pics/Z1Yd7upQsXY396551.jpg'}, {'end': 472.927, 'src': 'embed', 'start': 445.881, 'weight': 0, 'content': [{'end': 452.422, 'text': "Change the name of this notebook from Untitled to, let's say, what are our variables.", 'start': 445.881, 'duration': 6.541}, {'end': 453.782, 'text': 'Click Rename.', 'start': 453.182, 'duration': 0.6}, {'end': 462.304, 'text': "And once you do that, if you go back to desktop and the folder that we just created Python Tutorial 1, you'll see a new file.", 'start': 454.662, 'duration': 7.642}, {'end': 464.664, 'text': 'what are variables.ipynb.', 'start': 462.304, 'duration': 2.36}, {'end': 468.785, 'text': 'And ipynb is just an extension for Jupyter Notebook.', 'start': 465.344, 'duration': 3.441}, {'end': 472.927, 'text': "Now in Jupyter Notebook, there's something called a cell.", 'start': 470.126, 'duration': 2.801}], 'summary': "Renamed notebook to 'what are variables', found in 'python tutorial 1' folder.", 'duration': 27.046, 'max_score': 445.881, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/Z1Yd7upQsXY/pics/Z1Yd7upQsXY445881.jpg'}, {'end': 586.031, 'src': 'embed', 'start': 561.799, 'weight': 5, 'content': [{'end': 569.542, 'text': 'In this cell that you see right here in the green box, you can type in print double quotes more string.', 'start': 561.799, 'duration': 7.743}, {'end': 576.145, 'text': 'And actually, instead of using double quotes, you can also use single quotes in Python.', 'start': 570.562, 'duration': 5.583}, {'end': 580.907, 'text': 'And then you can run this cell and the string more string is printed.', 'start': 576.625, 'duration': 4.282}, {'end': 586.031, 'text': 'So you can use single quotes and double quotes pretty much interchangeably in Python.', 'start': 581.927, 'duration': 4.104}], 'summary': 'In python, you can use both single and double quotes interchangeably for printing strings.', 'duration': 24.232, 'max_score': 561.799, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/Z1Yd7upQsXY/pics/Z1Yd7upQsXY561799.jpg'}, {'end': 638.44, 'src': 'embed', 'start': 612.941, 'weight': 2, 'content': [{'end': 617.627, 'text': 'So when you run this cell, these two lines are executed one by one.', 'start': 612.941, 'duration': 4.686}, {'end': 623.494, 'text': 'So you see more string and three printed just one after another.', 'start': 618.488, 'duration': 5.006}, {'end': 628.616, 'text': "So let's now dive into our main topic here, namely what are variables?", 'start': 624.475, 'duration': 4.141}, {'end': 634.659, 'text': "Before I explain what are variables exactly in Python, I'm going to show you some sample code.", 'start': 629.717, 'duration': 4.942}, {'end': 638.44, 'text': 'You can write a equals 1.', 'start': 635.239, 'duration': 3.201}], 'summary': 'Executing code prints more string and 3 one after another. exploring the concept of variables in python with sample code.', 'duration': 25.499, 'max_score': 612.941, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/Z1Yd7upQsXY/pics/Z1Yd7upQsXY612941.jpg'}, {'end': 688.519, 'src': 'embed', 'start': 665.051, 'weight': 3, 'content': [{'end': 672.694, 'text': 'Or a more technically accurate way of thinking about it is that the variable a refers to the value 1.', 'start': 665.051, 'duration': 7.643}, {'end': 679.956, 'text': "and you can check what's inside the variable a by printing the variable with print parentheses a,", 'start': 672.694, 'duration': 7.262}, {'end': 688.519, 'text': "and note here that there are no double quotes or single quotes around this character a, and that's because a is not a string, it's a variable,", 'start': 679.956, 'duration': 8.563}], 'summary': 'Variable a holds the value 1, confirmed by printing a.', 'duration': 23.468, 'max_score': 665.051, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/Z1Yd7upQsXY/pics/Z1Yd7upQsXY665051.jpg'}], 'start': 374.938, 'title': 'Setting up jupyter notebook and introduction to python variables', 'summary': 'Covers the process of setting up jupyter notebook, creating the first program, and introducing python variables. it includes key steps, such as creating a new folder, opening jupyter notebook interface, creating a new notebook file, and demonstrating the use of the print function, assigning values to variables, and emphasizing the interchangeability of single and double quotes when defining strings.', 'chapters': [{'end': 472.927, 'start': 374.938, 'title': 'Setting up jupyter notebook and creating first program', 'summary': 'Covers the process of setting up jupyter notebook and creating the first program, including creating a new folder, opening jupyter notebook interface, and creating a new notebook file, with key steps and locations highlighted.', 'duration': 97.989, 'highlights': ['Creating a new folder on desktop before starting the first program, recommended by the speaker.', "Opening the Jupyter Notebook interface and creating a new notebook file named 'What are variables' under the folder 'Python Tutorial 1' on the desktop.", "Changing the name of the notebook file from 'Untitled' to 'What are variables' and the file appears with the extension .ipynb in the folder 'Python Tutorial 1' on the desktop."]}, {'end': 792.067, 'start': 473.667, 'title': 'Introduction to python variables', 'summary': 'Introduces the concept of python variables and demonstrates how to use the print function to display strings and numbers, assign values to variables, and print the contents of variables. it also emphasizes the interchangeability of single and double quotes when defining strings.', 'duration': 318.4, 'highlights': ['The chapter introduces the concept of Python variables and demonstrates how to use the print function to display strings and numbers.', 'It emphasizes the interchangeability of single and double quotes when defining strings.', 'It demonstrates the process of assigning values to variables and printing the contents of variables.']}], 'duration': 417.129, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/Z1Yd7upQsXY/pics/Z1Yd7upQsXY374938.jpg', 'highlights': ["Opening the Jupyter Notebook interface and creating a new notebook file named 'What are variables' under the folder 'Python Tutorial 1' on the desktop.", "Changing the name of the notebook file from 'Untitled' to 'What are variables' and the file appears with the extension .ipynb in the folder 'Python Tutorial 1' on the desktop.", 'The chapter introduces the concept of Python variables and demonstrates how to use the print function to display strings and numbers.', 'It demonstrates the process of assigning values to variables and printing the contents of variables.', 'Creating a new folder on desktop before starting the first program, recommended by the speaker.', 'It emphasizes the interchangeability of single and double quotes when defining strings.']}, {'end': 1143.684, 'segs': [{'end': 816.737, 'src': 'embed', 'start': 792.768, 'weight': 0, 'content': [{'end': 801.871, 'text': 'When you write a equals one in a different language, for example, C or C++, the correct way to think about it might be as a box.', 'start': 792.768, 'duration': 9.103}, {'end': 809.093, 'text': 'So you have a box a containing the value one, but in Python, this is not the accurate way to think about it.', 'start': 802.631, 'duration': 6.462}, {'end': 816.737, 'text': 'The more accurate way to think about it is that a is more like a name tag, and this can refer to any value you want.', 'start': 809.753, 'duration': 6.984}], 'summary': "In programming, 'a equals one' is a box in c or c++, but in python, 'a' is a name tag that can refer to any value.", 'duration': 23.969, 'max_score': 792.768, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/Z1Yd7upQsXY/pics/Z1Yd7upQsXY792768.jpg'}, {'end': 892.866, 'src': 'embed', 'start': 867.268, 'weight': 1, 'content': [{'end': 875.592, 'text': 'Then what happens is the variable d, of course, refers to the value 2, which the variable b also refers to.', 'start': 867.268, 'duration': 8.324}, {'end': 883.698, 'text': "So it's totally possible for two or more variables in Python to point to the same value, in this case two.", 'start': 876.312, 'duration': 7.386}, {'end': 889.763, 'text': "And then it's also possible for you to reassign an existing variable to another value.", 'start': 884.279, 'duration': 5.484}, {'end': 892.866, 'text': 'So if you write b equals one.', 'start': 890.224, 'duration': 2.642}], 'summary': 'Python allows multiple variables to reference the same value and be reassigned.', 'duration': 25.598, 'max_score': 867.268, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/Z1Yd7upQsXY/pics/Z1Yd7upQsXY867268.jpg'}], 'start': 792.768, 'title': 'Variables in python: assigning values and reassignment', 'summary': 'Discusses the concept of variables in python, explaining their role as name tags that can refer to different values, and demonstrates creating, reassigning, and pointing multiple variables to the same value. it also addresses assigning variables to each other, with illustrative examples.', 'chapters': [{'end': 1143.684, 'start': 792.768, 'title': 'Variables in python: assigning values and reassignment', 'summary': 'Discusses the concept of variables in python, explaining how they are more like name tags that can refer to different values, and demonstrates the process of creating, reassigning, and pointing multiple variables to the same value. it also addresses the possibility of assigning variables to each other, with an illustrative example.', 'duration': 350.916, 'highlights': ['Variables in Python are more like name tags that can refer to different values, rather than boxes containing a specific value, allowing for reassignment and multiple variables pointing to the same value.', 'Demonstrates the process of creating variables and reassigning them to different values in Python, showing how multiple variables can point to the same value and the possibility of reassigning an existing variable to another value.', 'Illustrates the possibility of assigning variables to each other, with an example of a variable referring to the value another variable is pointing to, emphasizing the importance of understanding variable referencing in Python.']}], 'duration': 350.916, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/Z1Yd7upQsXY/pics/Z1Yd7upQsXY792768.jpg', 'highlights': ['Variables in Python are more like name tags that can refer to different values, rather than boxes containing a specific value, allowing for reassignment and multiple variables pointing to the same value.', 'Demonstrates the process of creating variables and reassigning them to different values in Python, showing how multiple variables can point to the same value and the possibility of reassigning an existing variable to another value.', 'Illustrates the possibility of assigning variables to each other, with an example of a variable referring to the value another variable is pointing to, emphasizing the importance of understanding variable referencing in Python.']}, {'end': 1476.819, 'segs': [{'end': 1239.544, 'src': 'embed', 'start': 1168.118, 'weight': 3, 'content': [{'end': 1170.08, 'text': 'Click new in the top right corner.', 'start': 1168.118, 'duration': 1.962}, {'end': 1171.44, 'text': 'Click Python three again.', 'start': 1170.42, 'duration': 1.02}, {'end': 1180.75, 'text': "And let's rename this notebook by clicking untitled and by changing it to swapping to variables.", 'start': 1172.561, 'duration': 8.189}, {'end': 1183.257, 'text': "And here's the problem.", 'start': 1182.356, 'duration': 0.901}, {'end': 1185.379, 'text': "You're given two variables.", 'start': 1183.597, 'duration': 1.782}, {'end': 1194.368, 'text': "Let's say v1 equals first string in double quotes and v2 equals second string again in double quotes.", 'start': 1185.94, 'duration': 8.428}, {'end': 1197.891, 'text': 'How can you swap the values within these two variables with each other?', 'start': 1194.768, 'duration': 3.123}, {'end': 1208.64, 'text': 'The easiest way to solve this problem is just to write v1 equals second string and then b2 equals first string.', 'start': 1198.411, 'duration': 10.229}, {'end': 1217.446, 'text': 'But this might not be the best solution, because if you had a much longer string, it would be kind of cumbersome to repeat these strings.', 'start': 1208.64, 'duration': 8.806}, {'end': 1219.888, 'text': 'and Then, if one of the strings changes.', 'start': 1217.446, 'duration': 2.442}, {'end': 1230.516, 'text': 'so if first string becomes first two strings, Then you need to rewrite your code right here to match that, to write first two strings again.', 'start': 1219.888, 'duration': 10.628}, {'end': 1235.36, 'text': 'So ideally you want to be able to solve this problem without repeating the strings.', 'start': 1231.096, 'duration': 4.264}, {'end': 1239.544, 'text': "Think about it for a second, and then I'm going to show you what a good solution might look like.", 'start': 1235.841, 'duration': 3.703}], 'summary': 'Given a python notebook, demonstrating how to swap variables efficiently without repeating strings.', 'duration': 71.426, 'max_score': 1168.118, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/Z1Yd7upQsXY/pics/Z1Yd7upQsXY1168118.jpg'}, {'end': 1318.964, 'src': 'embed', 'start': 1263.423, 'weight': 2, 'content': [{'end': 1274.707, 'text': 'but actually this solution is wrong, because when we execute this line, v1 equals v2, v1 now refers to whatever v2 refers to, of course,', 'start': 1263.423, 'duration': 11.284}, {'end': 1275.707, 'text': 'which is second string.', 'start': 1274.707, 'duration': 1}, {'end': 1284.53, 'text': 'And then, when we write v2 equals v1, v2 will now refer to what v1 refers to now, which is second string.', 'start': 1276.387, 'duration': 8.143}, {'end': 1292.914, 'text': "So at the end of these lines of code, we'll have v1 and v2 both referring to second string, which is not what we want.", 'start': 1285.191, 'duration': 7.723}, {'end': 1296.095, 'text': "Let's now see what a good solution might look like.", 'start': 1294.014, 'duration': 2.081}, {'end': 1298.896, 'text': "I'm going to give you a few different options here.", 'start': 1296.895, 'duration': 2.001}, {'end': 1302.457, 'text': 'The first option is to use two temporary variables.', 'start': 1299.496, 'duration': 2.961}, {'end': 1305.699, 'text': "We're going to call them temp1 and temp2.", 'start': 1302.958, 'duration': 2.741}, {'end': 1318.964, 'text': "temp1 will be equal to what v1 refers to, so that's first string, and then temp2 will be equal to what v2 refers to, which is of course second string.", 'start': 1306.419, 'duration': 12.545}], 'summary': 'Using two temporary variables can resolve the issue.', 'duration': 55.541, 'max_score': 1263.423, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/Z1Yd7upQsXY/pics/Z1Yd7upQsXY1263423.jpg'}, {'end': 1377.204, 'src': 'embed', 'start': 1350.564, 'weight': 1, 'content': [{'end': 1354.527, 'text': "Okay, here's a solution that only uses one temporary variable instead of two.", 'start': 1350.564, 'duration': 3.963}, {'end': 1362.173, 'text': "The first thing we're going to do is we're going to set a new temporary variable called temp to what v1 refers to.", 'start': 1355.248, 'duration': 6.925}, {'end': 1367.117, 'text': 'So temp will be this string right here.', 'start': 1363.134, 'duration': 3.983}, {'end': 1371.28, 'text': "And after that, we'll set v1 to v2.", 'start': 1368.418, 'duration': 2.862}, {'end': 1377.204, 'text': 'So v1 will no longer refer to first string, and then it will refer to second string instead.', 'start': 1371.941, 'duration': 5.263}], 'summary': 'Optimized solution using one temporary variable and swapping v1 with v2.', 'duration': 26.64, 'max_score': 1350.564, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/Z1Yd7upQsXY/pics/Z1Yd7upQsXY1350564.jpg'}, {'end': 1427.491, 'src': 'embed', 'start': 1403.08, 'weight': 0, 'content': [{'end': 1410.683, 'text': 'And this little pattern of using a single variable to switch the values of two variables is actually really important to know,', 'start': 1403.08, 'duration': 7.603}, {'end': 1413.665, 'text': "because it's a very common pattern to use for any programmer.", 'start': 1410.683, 'duration': 2.982}, {'end': 1417.626, 'text': "Okay, let's now test that pattern with our Python code.", 'start': 1414.665, 'duration': 2.961}, {'end': 1420.468, 'text': "So in the second cell, we're going to write our solution.", 'start': 1417.987, 'duration': 2.481}, {'end': 1427.491, 'text': "We're going to create a new variable called temp, which refers to whatever v1 refers to, which is first string.", 'start': 1421.048, 'duration': 6.443}], 'summary': 'Using a single variable to switch values is important for programmers. testing pattern with python code.', 'duration': 24.411, 'max_score': 1403.08, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/Z1Yd7upQsXY/pics/Z1Yd7upQsXY1403080.jpg'}], 'start': 1143.684, 'title': 'Variable swapping practice and solutions', 'summary': 'Covers variable swapping practice, an incorrect variable swap problem, and the process of swapping variables in python. it also demonstrates efficient solutions and emphasizes the significance of the common pattern for programmers.', 'chapters': [{'end': 1239.544, 'start': 1143.684, 'title': 'Variable swapping practice', 'summary': 'Introduces a practice problem to solidify understanding of variables, demonstrating how to swap the values within two variables without repeating the strings and providing a more efficient solution.', 'duration': 95.86, 'highlights': ['The chapter introduces a practice problem to solidify understanding of variables, demonstrating how to swap the values within two variables without repeating the strings and providing a more efficient solution.', 'The easiest way to solve the variable swapping problem is to directly assign the values of the variables to each other, but this may not be the best solution for longer strings or if the strings change.', 'It is ideal to solve the variable swapping problem without repeating the strings, and the chapter encourages the audience to think about a more efficient solution.']}, {'end': 1292.914, 'start': 1240.105, 'title': 'Variable swap problem', 'summary': 'Discusses the incorrect solution of swapping variables v1 and v2 and explains the flaw in the logic, resulting in both variables referring to the second string at the end of the code.', 'duration': 52.809, 'highlights': ['The incorrect solution of swapping variables v1 and v2 results in both variables referring to the second string at the end of the code.', 'Explanation of why the initial solution of swapping variables is flawed.']}, {'end': 1476.819, 'start': 1294.014, 'title': 'Swapping variables in python', 'summary': 'Explores the process of swapping variables in python using temporary variables and demonstrates a more efficient solution that employs a single temporary variable, emphasizing the common pattern and its significance for programmers.', 'duration': 182.805, 'highlights': ['The process involves using two temporary variables, temp1 and temp2, to swap the values of v1 and v2, showcasing a potential solution with quantifiable steps and demonstrating the need for improvement.', 'A more efficient solution is presented, utilizing only one temporary variable called temp to switch the values of v1 and v2, highlighting the significance of this common pattern for programmers and emphasizing its practical application.', 'The demonstration of the Python code validates the effectiveness of the single-variable swapping pattern, showcasing the successful swapping of v1 and v2 and reinforcing the importance of understanding this approach in programming.']}], 'duration': 333.135, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/Z1Yd7upQsXY/pics/Z1Yd7upQsXY1143684.jpg', 'highlights': ['The demonstration of the Python code validates the effectiveness of the single-variable swapping pattern, showcasing the successful swapping of v1 and v2 and reinforcing the importance of understanding this approach in programming.', 'A more efficient solution is presented, utilizing only one temporary variable called temp to switch the values of v1 and v2, highlighting the significance of this common pattern for programmers and emphasizing its practical application.', 'The process involves using two temporary variables, temp1 and temp2, to swap the values of v1 and v2, showcasing a potential solution with quantifiable steps and demonstrating the need for improvement.', 'The chapter introduces a practice problem to solidify understanding of variables, demonstrating how to swap the values within two variables without repeating the strings and providing a more efficient solution.', 'It is ideal to solve the variable swapping problem without repeating the strings, and the chapter encourages the audience to think about a more efficient solution.', 'The easiest way to solve the variable swapping problem is to directly assign the values of the variables to each other, but this may not be the best solution for longer strings or if the strings change.', 'The incorrect solution of swapping variables v1 and v2 results in both variables referring to the second string at the end of the code.', 'Explanation of why the initial solution of swapping variables is flawed.']}], 'highlights': ['Python is popular at smaller and larger companies, including Google, and is widely used in universities for computer science courses.', 'The series is designed for complete beginners and those with some programming experience, aiming to teach Python programming.', 'The video covers topics such as Python introduction, installation, setting up a development environment, using the print function, and understanding variables.', 'The use of Jupyter Notebook is emphasized as the development environment for the series.', 'Variables in Python are more like name tags that can refer to different values, rather than boxes containing a specific value, allowing for reassignment and multiple variables pointing to the same value.', 'The demonstration of the Python code validates the effectiveness of the single-variable swapping pattern, showcasing the successful swapping of v1 and v2 and reinforcing the importance of understanding this approach in programming.', 'A more efficient solution is presented, utilizing only one temporary variable called temp to switch the values of v1 and v2, highlighting the significance of this common pattern for programmers and emphasizing its practical application.', 'The process involves using two temporary variables, temp1 and temp2, to swap the values of v1 and v2, showcasing a potential solution with quantifiable steps and demonstrating the need for improvement.', 'The chapter introduces a practice problem to solidify understanding of variables, demonstrating how to swap the values within two variables without repeating the strings and providing a more efficient solution.']}