title
Full Dash App - Data Visualization GUIs with Dash and Python p.12

description
Running through the larger Dash sentiment streaming application. Github source: https://github.com/Sentdex/socialsentiment/ Discord: https://discordapp.com/invite/3jCqXJj 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': 'Full Dash App - Data Visualization GUIs with Dash and Python p.12', 'heatmap': [{'end': 407.038, 'start': 362.655, 'weight': 1}], 'summary': 'The tutorial covers the update of a data visualization app with python and dash, demonstrating improvements in text search speed using sqlite, live sentiment tracking with instant tweet updates, color-coded sentiment analysis, and open-sourced code for further exploration, as well as providing an overview of twitter stream analysis, database caching for web app performance, and the use of materialized css and plotly graphs integration, and discussing optimizing cache for sql queries, utilizing sqlite fts for text search, and addressing design and functionality improvements.', 'chapters': [{'end': 246.676, 'segs': [{'end': 30.443, 'src': 'embed', 'start': 1.553, 'weight': 0, 'content': [{'end': 6.559, 'text': "what's going on everybody and welcome to another data visualization with python and dash tutorial.", 'start': 1.553, 'duration': 5.006}, {'end': 14.147, 'text': "in this tutorial, what we're going to be doing is kind of bringing everything up to at least the point where i'm at right now with the app.", 'start': 6.559, 'duration': 7.588}, {'end': 21.115, 'text': "there's a lot of little things that have been thrown in here and changed and added and all that, and i'll just kind of go over them pretty quickly.", 'start': 14.147, 'duration': 6.968}, {'end': 30.443, 'text': "there's really no Super new concepts here, except for maybe the way that, though, that we're doing the database, Which I may get into the,", 'start': 21.115, 'duration': 9.328}], 'summary': 'Data visualization tutorial covering app development with python and dash, focusing on database implementation.', 'duration': 28.89, 'max_score': 1.553, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/rDodciQhfS8/pics/rDodciQhfS81553.jpg'}, {'end': 118.011, 'src': 'embed', 'start': 85.996, 'weight': 1, 'content': [{'end': 87.817, 'text': "so that's one thing I'd like to improve.", 'start': 85.996, 'duration': 1.821}, {'end': 92.64, 'text': 'Otherwise, what we have is just live updated sentiment over here.', 'start': 88.017, 'duration': 4.623}, {'end': 94.681, 'text': "Just basically it's every second, I think.", 'start': 92.72, 'duration': 1.961}, {'end': 98.343, 'text': 'And then over here, this is just longer term sentiment.', 'start': 95.602, 'duration': 2.741}, {'end': 99.104, 'text': "It's updated.", 'start': 98.504, 'duration': 0.6}, {'end': 102.186, 'text': 'We can look at that later, but I think maybe 60 seconds.', 'start': 99.164, 'duration': 3.022}, {'end': 103.787, 'text': 'Here are the tweets.', 'start': 103.106, 'duration': 0.681}, {'end': 105.367, 'text': 'These are updated instantly.', 'start': 103.887, 'duration': 1.48}, {'end': 107.829, 'text': 'So as they come in, it gets updated here.', 'start': 105.448, 'duration': 2.381}, {'end': 118.011, 'text': 'And then also I show basically the date, the tweet and then the sentiment, and I also color code the sentiment with a slight kind of background Tint,', 'start': 108.629, 'duration': 9.382}], 'summary': 'Improving live sentiment analysis with updated data and real-time tweet updates.', 'duration': 32.015, 'max_score': 85.996, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/rDodciQhfS8/pics/rDodciQhfS885996.jpg'}, {'end': 198.231, 'src': 'embed', 'start': 170.399, 'weight': 2, 'content': [{'end': 173.38, 'text': "but that's also so like, depending on what you search into here.", 'start': 170.399, 'duration': 2.981}, {'end': 178.502, 'text': "like, if we search car, we can see the related terms to car, and that's just any.", 'start': 173.38, 'duration': 5.122}, {'end': 187.666, 'text': "basically it's any nouns that are contained in tweets with car and then we count and then the top ones get shown.", 'start': 178.502, 'duration': 9.164}, {'end': 192.967, 'text': 'um, so for especially for a lot of things like, for example, with car, career gets chosen.', 'start': 187.666, 'duration': 5.301}, {'end': 196.85, 'text': "Well, car is a, it's a sub word inside of career.", 'start': 193.007, 'duration': 3.843}, {'end': 198.231, 'text': "And so that's probably what's going on.", 'start': 196.91, 'duration': 1.321}], 'summary': "Analyzing tweets for related terms to 'car', career is a top choice due to its inclusion of 'car' as a sub-word.", 'duration': 27.832, 'max_score': 170.399, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/rDodciQhfS8/pics/rDodciQhfS8170399.jpg'}], 'start': 1.553, 'title': 'Twitter sentiment analysis app update and live sentiment tracking demo', 'summary': 'Covers the update of a data visualization with python and dash tutorial, including changes in the app and improvements in text search speed using sqlite. it also discusses a live sentiment tracking demo showcasing instant tweet updates, color-coded sentiment analysis, and open-sourced code for further exploration.', 'chapters': [{'end': 85.996, 'start': 1.553, 'title': 'Twitter sentiment analysis app update', 'summary': 'Covers the update of a data visualization with python and dash tutorial, including changes in the app and improvements in text search speed using sqlite.', 'duration': 84.443, 'highlights': ['The tutorial covers the update of a data visualization with Python and Dash, focusing on minor changes in the app and improvements in text search speed using SQLite.', 'The app, live Twitter sentiment, allows users to type in a search term and observe the search results, with a note on the speed difference when highlighting and deleting the search term.', 'The text search in the current setup searches for each letter in the database, resulting in a delay when typing slower, while typing faster may not display the intermediate search results.']}, {'end': 150.868, 'start': 85.996, 'title': 'Live sentiment tracking demo', 'summary': 'Discusses a live sentiment tracking demo showcasing instant tweet updates, color-coded sentiment analysis, and open-sourced code for further exploration.', 'duration': 64.872, 'highlights': ['The demo showcases live updated sentiment data every second and longer-term sentiment updated approximately every 60 seconds.', 'The tweets are updated instantly as they come in, and each tweet is accompanied by its date, content, and sentiment, color-coded with green for positive and red for negative sentiments.', 'The code for the live sentiment tracking demo is open-sourced and available on GitHub at github.com/Centex/social-sentiment.']}, {'end': 246.676, 'start': 151.528, 'title': 'Explaining related terms in tweets', 'summary': "Discusses the feature that shows related terms to a search query in tweets, with examples such as 'car' and 'trump' and mentions of specific terms related to 'trump' in tweets, including 'sessions,' 'rex tillerson,' 'russia,' and 'gop.'", 'duration': 95.148, 'highlights': ["The feature shows related terms to a search query in tweets, with examples like 'car' and 'Trump' and the top related terms are determined by counting the occurrences of nouns contained in tweets with the search query.", "Specific terms related to 'Trump' in tweets are mentioned, including 'Sessions,' 'Rex Tillerson,' 'Russia,' and 'gop.'", "The feature works based on counting the occurrences of nouns contained in tweets with the search query, where for 'car,' 'career' gets chosen, as 'car' is a sub-word inside of 'career.'", 'The chapter discusses the truncation of the database and the recent passing of Stephen Hawking.']}], 'duration': 245.123, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/rDodciQhfS8/pics/rDodciQhfS81553.jpg', 'highlights': ['The tutorial covers the update of a data visualization with Python and Dash, focusing on minor changes in the app and improvements in text search speed using SQLite.', 'The demo showcases live updated sentiment data every second and longer-term sentiment updated approximately every 60 seconds.', "The feature shows related terms to a search query in tweets, with examples like 'car' and 'Trump' and the top related terms are determined by counting the occurrences of nouns contained in tweets with the search query."]}, {'end': 541.698, 'segs': [{'end': 294.568, 'src': 'embed', 'start': 246.676, 'weight': 0, 'content': [{'end': 251.038, 'text': "so that's trending um and yeah the other thing.", 'start': 246.676, 'duration': 4.362}, {'end': 254.58, 'text': "so let's run through the code at this point.", 'start': 251.038, 'duration': 3.542}, {'end': 258.303, 'text': 'So what we have here is the contents in here.', 'start': 255.24, 'duration': 3.063}, {'end': 260.565, 'text': 'Basically, the main application is this dash mess.', 'start': 258.363, 'duration': 2.202}, {'end': 268.313, 'text': 'If you wanted to run it locally, you can use the dev server just so you could run it on local host port 8050.', 'start': 261.307, 'duration': 7.006}, {'end': 272.777, 'text': "The Twitter stream, this is what you're going to use to actually stream tweets from Twitter.", 'start': 268.313, 'duration': 4.464}, {'end': 276.16, 'text': "You've got the config, which right now is just stop words.", 'start': 273.057, 'duration': 3.103}, {'end': 280.984, 'text': 'So it has to do with these related terms for the most part.', 'start': 276.2, 'duration': 4.784}, {'end': 285.048, 'text': "So there's a lot of words that we, you know, they're just totally useless.", 'start': 281.064, 'duration': 3.984}, {'end': 288.911, 'text': 'So we actually want to just ignore them if they did happen to come up.', 'start': 285.248, 'duration': 3.663}, {'end': 294.568, 'text': "So that's all that's in the config, but we'll look at it in a moment.", 'start': 291.266, 'duration': 3.302}], 'summary': 'Code runs twitter stream for data analysis on stop words.', 'duration': 47.892, 'max_score': 246.676, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/rDodciQhfS8/pics/rDodciQhfS8246676.jpg'}, {'end': 360.675, 'src': 'embed', 'start': 332.067, 'weight': 3, 'content': [{'end': 337.829, 'text': "i think we had like 35 million records or something, and i just i didn't want to leave a bunch of records i could never get rid of.", 'start': 332.067, 'duration': 5.762}, {'end': 338.709, 'text': 'so i just started over.', 'start': 337.829, 'duration': 0.88}, {'end': 342.59, 'text': 'but it should be about 3.5 million records a day.', 'start': 339.629, 'duration': 2.961}, {'end': 348.832, 'text': "if you're faster processing, you should be able to get more than four, and if you're slower at processing you might get less.", 'start': 342.59, 'duration': 6.242}, {'end': 352.012, 'text': "but that's a lot of records every day and that database grows very quick.", 'start': 348.832, 'duration': 3.18}, {'end': 360.675, 'text': "it's just a simple SQLite database, but we're actually using FTS with the SQLite, which is great for text search.", 'start': 352.012, 'duration': 8.663}], 'summary': 'Database has 35m records, processes 3.5m/day. uses fts for text search.', 'duration': 28.608, 'max_score': 332.067, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/rDodciQhfS8/pics/rDodciQhfS8332067.jpg'}, {'end': 425.414, 'src': 'heatmap', 'start': 362.655, 'weight': 4, 'content': [{'end': 368.337, 'text': 'so I think probably the first thing we\'ll open up here is just "-mes.py to kind of run through the code.', 'start': 362.655, 'duration': 5.682}, {'end': 372.859, 'text': "here I'm trying to think if there's anything super major.", 'start': 368.337, 'duration': 4.522}, {'end': 376.821, 'text': "So a lot of stuff here, it's just really pretty badly organized.", 'start': 372.939, 'duration': 3.882}, {'end': 383.484, 'text': "So if anybody wants to contribute, that's probably one really easy way to do it is just to pepate this code.", 'start': 376.941, 'duration': 6.543}, {'end': 384.985, 'text': "It's just all over the place.", 'start': 383.544, 'duration': 1.441}, {'end': 390.828, 'text': "But as you can see, we've got basically the layout of the application.", 'start': 385.945, 'duration': 4.883}, {'end': 396.171, 'text': "I'm using the row divs basically from materialized CSS.", 'start': 390.868, 'duration': 5.303}, {'end': 407.038, 'text': "So that's kind of how we're maintaining the interactability, I guess, of the application.", 'start': 396.452, 'duration': 10.586}, {'end': 412.141, 'text': "So, for example, if I squish this up, everything's kind of interactive and eventually it'll pop down,", 'start': 407.078, 'duration': 5.063}, {'end': 416.709, 'text': "And then we just have one graph and one thing per, and the table's actually interactive as well.", 'start': 412.486, 'duration': 4.223}, {'end': 425.414, 'text': "So using materialized CSS, we're able to actually have that interactability, I guess.", 'start': 417.829, 'duration': 7.585}], 'summary': 'Transcript showcases poorly organized code and use of materialized css for interactive elements.', 'duration': 28.962, 'max_score': 362.655, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/rDodciQhfS8/pics/rDodciQhfS8362655.jpg'}, {'end': 501.335, 'src': 'embed', 'start': 474.149, 'weight': 5, 'content': [{'end': 480.815, 'text': "Uh, the only graph that probably we haven't covered is a pie chart, but again, all these things are just plotly graphs.", 'start': 474.149, 'duration': 6.666}, {'end': 489.925, 'text': "Uh, so with the pie, I honestly can't remember if it's a donut in, um, No, it's a pie.", 'start': 481.355, 'duration': 8.57}, {'end': 490.685, 'text': "Yeah, it's called pie.", 'start': 490.005, 'duration': 0.68}, {'end': 501.335, 'text': 'But again, to figure out for me the way that I did, that I just went to the Plotly documentation, looked for a pie chart, what was required,', 'start': 492.087, 'duration': 9.248}], 'summary': 'The speaker discussed pie chart and obtaining information from plotly documentation.', 'duration': 27.186, 'max_score': 474.149, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/rDodciQhfS8/pics/rDodciQhfS8474149.jpg'}], 'start': 246.676, 'title': 'Twitter stream analysis and database caching', 'summary': "Provides an overview of twitter stream analysis code, local server setup, and stop words. it also discusses database caching for quicker web app performance, truncating a database with 35 million records to 3.5 million records daily, and organizing the web app's code and layout with materialized css and plotly graphs integration.", 'chapters': [{'end': 294.568, 'start': 246.676, 'title': 'Twitter stream analysis code overview', 'summary': 'Provides an overview of the code for analyzing twitter streams, including the main application, local server setup, and the purpose of the configuration file with stop words.', 'duration': 47.892, 'highlights': ['The main application is the dash mess, which can be run locally using the dev server on localhost port 8050.', 'The Twitter stream code is used for streaming tweets from Twitter for analysis.', 'The configuration file contains stop words used to filter out irrelevant terms from the tweets.']}, {'end': 541.698, 'start': 294.889, 'title': 'Database caching and web app structure', 'summary': "Discusses database caching for quicker web app performance, truncating a database with 35 million records to 3.5 million records a day, and organizing the web app's code and layout, using materialized css for interactability and integrating plotly graphs.", 'duration': 246.809, 'highlights': ['Truncating a database from 35 million records to 3.5 million records a day. The speaker mentions truncating a database from 35 million records down to 3.5 million records a day, emphasizing the rapid growth of the database and the need for efficient processing.', 'Using materialized CSS for interactive web app layout and integrating Google Analytics. The chapter discusses the usage of materialized CSS for an interactive web app layout, highlighting the integration of Google Analytics and the benefits of maintaining interactability.', 'Utilizing plotly graphs and referencing its documentation for creating different graph types. The speaker mentions using plotly graphs, specifically referencing the documentation for creating various graph types like line graphs and pie charts, emphasizing the ease of implementation and the return of data and layout.']}], 'duration': 295.022, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/rDodciQhfS8/pics/rDodciQhfS8246676.jpg', 'highlights': ['The main application is the dash mess, which can be run locally using the dev server on localhost port 8050.', 'The Twitter stream code is used for streaming tweets from Twitter for analysis.', 'The configuration file contains stop words used to filter out irrelevant terms from the tweets.', 'Truncating a database from 35 million records to 3.5 million records a day. The speaker mentions truncating a database from 35 million records down to 3.5 million records a day, emphasizing the rapid growth of the database and the need for efficient processing.', 'Using materialized CSS for interactive web app layout and integrating Google Analytics. The chapter discusses the usage of materialized CSS for an interactive web app layout, highlighting the integration of Google Analytics and the benefits of maintaining interactability.', 'Utilizing plotly graphs and referencing its documentation for creating different graph types. The speaker mentions using plotly graphs, specifically referencing the documentation for creating various graph types like line graphs and pie charts, emphasizing the ease of implementation and the return of data and layout.']}, {'end': 935.754, 'segs': [{'end': 571.625, 'src': 'embed', 'start': 541.718, 'weight': 0, 'content': [{'end': 552.245, 'text': "So for example, we're using this caching system so that we only pull, like for example, is this, I'm trying to look for one that updates our cache.", 'start': 541.718, 'duration': 10.527}, {'end': 559.53, 'text': "It's at least one of the SQL queries that's like the 10,000 poll, for example.", 'start': 555.588, 'duration': 3.942}, {'end': 563.833, 'text': "It's not going to be that one.", 'start': 559.55, 'duration': 4.283}, {'end': 568.123, 'text': 'I could just do a search, I suppose, for cache.', 'start': 565.342, 'duration': 2.781}, {'end': 569.804, 'text': "Cache.get, I don't want to do that.", 'start': 568.183, 'duration': 1.621}, {'end': 571.625, 'text': "Here's a cache.set here at least.", 'start': 569.904, 'duration': 1.721}], 'summary': 'Using caching system to optimize sql queries, with a 10,000 pull example.', 'duration': 29.907, 'max_score': 541.718, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/rDodciQhfS8/pics/rDodciQhfS8541718.jpg'}, {'end': 641.311, 'src': 'embed', 'start': 617.415, 'weight': 1, 'content': [{'end': 624.179, 'text': "where you're looking for a word inside of one of the columns and you're using that whole like like thing,", 'start': 617.415, 'duration': 6.764}, {'end': 634.486, 'text': 'then you will probably be able to see significant gains, like huge gains, by using FTS Fast Text Search.', 'start': 625.68, 'duration': 8.806}, {'end': 639.069, 'text': "Actually, I'm not even sure if that's what it stands for, but that's probably what it stands for.", 'start': 634.766, 'duration': 4.303}, {'end': 641.311, 'text': "Anyway, sorry if that's not what it stands for.", 'start': 639.449, 'duration': 1.862}], 'summary': 'Fts fast text search can lead to significant gains in finding words within columns.', 'duration': 23.896, 'max_score': 617.415, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/rDodciQhfS8/pics/rDodciQhfS8617415.jpg'}, {'end': 723.933, 'src': 'embed', 'start': 693.492, 'weight': 2, 'content': [{'end': 700.858, 'text': "so these words right here, i'd really like to make them clickable, and the issue i had was obviously to make them clickable.", 'start': 693.492, 'duration': 7.366}, {'end': 705.181, 'text': 'you would just give them some sort of id and then have like an on click event.', 'start': 700.858, 'duration': 4.323}, {'end': 715.749, 'text': 'the problem i came across is when they are displayed on the page that causes an event which caused them to run.', 'start': 705.181, 'duration': 10.568}, {'end': 723.933, 'text': 'And then it just starts this never ending loop of, One gets called, it pops up, does a search, gets some related terms.', 'start': 716.05, 'duration': 7.883}], 'summary': 'The challenge is making certain words clickable without causing a never-ending loop.', 'duration': 30.441, 'max_score': 693.492, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/rDodciQhfS8/pics/rDodciQhfS8693492.jpg'}, {'end': 781.704, 'src': 'embed', 'start': 755.41, 'weight': 3, 'content': [{'end': 763.878, 'text': "I mostly just wanted to to put the code out, describe a few things to you guys and explain a few things, and then And really that's it.", 'start': 755.41, 'duration': 8.468}, {'end': 766.681, 'text': "So I don't think.", 'start': 764.078, 'duration': 2.603}, {'end': 767.502, 'text': 'oh the other thing.', 'start': 766.681, 'duration': 0.821}, {'end': 778.721, 'text': 'for I still was making that mistake here, where we were just defining external js, but then i was iterating over external css,', 'start': 767.502, 'duration': 11.219}, {'end': 779.962, 'text': 'which was kind of weird.', 'start': 778.721, 'duration': 1.241}, {'end': 781.704, 'text': "so that's been going on for a while.", 'start': 779.962, 'duration': 1.742}], 'summary': 'Code was shared, explanations given, and a mistake in defining external css was noted.', 'duration': 26.294, 'max_score': 755.41, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/rDodciQhfS8/pics/rDodciQhfS8755410.jpg'}, {'end': 832.311, 'src': 'embed', 'start': 803.245, 'weight': 4, 'content': [{'end': 804.826, 'text': 'if you want to deploy it, use this.', 'start': 803.245, 'duration': 1.581}, {'end': 809.69, 'text': 'otherwise just run the dev server instead, And then this should be probably run from time to time.', 'start': 804.826, 'duration': 4.864}, {'end': 811.871, 'text': "I think that's really it.", 'start': 811.03, 'duration': 0.841}, {'end': 814.312, 'text': "I don't really know that I need to cover anything else.", 'start': 812.251, 'duration': 2.061}, {'end': 820.854, 'text': 'But if you have like questions or whatever on the application itself, feel free to ask in the comments below.', 'start': 814.392, 'duration': 6.462}, {'end': 822.935, 'text': 'You can also join our Discord.', 'start': 821.274, 'duration': 1.661}, {'end': 825.096, 'text': "I'll have a link in the description for the Discord.", 'start': 822.975, 'duration': 2.121}, {'end': 828.37, 'text': 'If you want, you can also file an issue.', 'start': 825.989, 'duration': 2.381}, {'end': 832.311, 'text': "Like someone said social sentiment wasn't working, but I guess he hasn't responded yet.", 'start': 828.43, 'duration': 3.881}], 'summary': 'Use dev server for deployment, run periodically. join discord, file issues for queries.', 'duration': 29.066, 'max_score': 803.245, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/rDodciQhfS8/pics/rDodciQhfS8803245.jpg'}, {'end': 872.88, 'src': 'embed', 'start': 845.795, 'weight': 5, 'content': [{'end': 850.717, 'text': 'If you have ideas on how to make this look better, even if you just wanna change the colors, uh, go for it.', 'start': 845.795, 'duration': 4.922}, {'end': 853.86, 'text': "most of the colors, like i said, are oops, who's that?", 'start': 850.717, 'duration': 3.143}, {'end': 855.441, 'text': "who's that good looking individual?", 'start': 853.86, 'duration': 1.581}, {'end': 857.823, 'text': 'oh, my goodness.', 'start': 855.441, 'duration': 2.382}, {'end': 861.326, 'text': "uh, let's go to dash mess.", 'start': 857.823, 'duration': 3.503}, {'end': 869.994, 'text': 'so the main colors are right here in app colors, and then these are sentiment colors, for, uh, the related sentiment, i believe,', 'start': 861.326, 'duration': 8.668}, {'end': 872.88, 'text': 'and then Really really well placed.', 'start': 869.994, 'duration': 2.886}], 'summary': 'Discussion about making visual improvements to the app, including changing colors and sentiment colors.', 'duration': 27.085, 'max_score': 845.795, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/rDodciQhfS8/pics/rDodciQhfS8845795.jpg'}], 'start': 541.718, 'title': 'Optimizing cache, sqlite fts, code and design', 'summary': 'Discusses optimizing cache for sql queries, utilizing sqlite fts for text search, and addressing challenges in making terms clickable. it also emphasizes the need to fix code issues, deploy code, and seek feedback for improving design and functionality.', 'chapters': [{'end': 738.242, 'start': 541.718, 'title': 'Optimizing cache and sqlite fts', 'summary': 'Discusses the usage of caching system for sql queries, the benefits of using fts from sqlite for text search, and the challenges faced in making specific terms clickable, with an emphasis on the importance of optimization in improving query performance.', 'duration': 196.524, 'highlights': ['The usage of caching system for SQL queries is highlighted, emphasizing the benefits of optimization in improving query performance and reducing the time taken for queries, such as the 10,000-poll query. The caching system is used to optimize SQL queries, specifically reducing the time taken for queries, such as the 10,000-poll query, by efficiently storing and retrieving data.', 'The advantages of using FTS from SQLite for text search are emphasized, with a mention of significant gains in query performance by utilizing FTS for word searches within columns. FTS from SQLite is highlighted for its advantages in text search, particularly in achieving significant gains in query performance when used for word searches within columns.', 'The challenge of making specific terms clickable is discussed, highlighting the issue of causing an event loop and the need for finding a suitable approach to handle clickable terms effectively. The challenge of making specific terms clickable is highlighted, addressing the issue of causing an event loop and the need for finding a suitable approach to handle clickable terms effectively.']}, {'end': 935.754, 'start': 739.503, 'title': 'Improving code and design', 'summary': 'Discusses the need to fix code issues, such as iterating over external css instead of js, and provides instructions for deploying the code, and encourages feedback for improving the design and functionality of the application.', 'duration': 196.251, 'highlights': ['The need to fix code issues, such as iterating over external css instead of js, is mentioned. Code issues, such as the mentioned mistake, need to be addressed.', 'Instructions for deploying the code and ensuring its proper functioning are provided. Clear guidance is given for installing the requirements and filling in information to the twitter stream.pi for deployment.', 'Encouragement for feedback and suggestions to improve the design and functionality of the application is emphasized. The speaker encourages feedback, including ideas for improving the design and functionality of the application.']}], 'duration': 394.036, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/rDodciQhfS8/pics/rDodciQhfS8541718.jpg', 'highlights': ['The caching system optimizes SQL queries, reducing time taken for queries, such as the 10,000-poll query.', 'FTS from SQLite achieves significant gains in query performance for word searches within columns.', 'Addressing the challenge of making specific terms clickable effectively is highlighted.', 'Code issues, like iterating over external CSS instead of JS, need to be fixed.', 'Clear guidance is provided for deploying the code and ensuring its proper functioning.', 'Encouragement for feedback and suggestions to improve the design and functionality is emphasized.']}], 'highlights': ['The tutorial covers the update of a data visualization with Python and Dash, focusing on minor changes in the app and improvements in text search speed using SQLite.', 'The demo showcases live updated sentiment data every second and longer-term sentiment updated approximately every 60 seconds.', "The feature shows related terms to a search query in tweets, with examples like 'car' and 'Trump' and the top related terms are determined by counting the occurrences of nouns contained in tweets with the search query.", 'The main application is the dash mess, which can be run locally using the dev server on localhost port 8050.', 'The Twitter stream code is used for streaming tweets from Twitter for analysis.', 'The configuration file contains stop words used to filter out irrelevant terms from the tweets.', 'Truncating a database from 35 million records to 3.5 million records a day. The speaker mentions truncating a database from 35 million records down to 3.5 million records a day, emphasizing the rapid growth of the database and the need for efficient processing.', 'Using materialized CSS for interactive web app layout and integrating Google Analytics. The chapter discusses the usage of materialized CSS for an interactive web app layout, highlighting the integration of Google Analytics and the benefits of maintaining interactability.', 'Utilizing plotly graphs and referencing its documentation for creating different graph types. The speaker mentions using plotly graphs, specifically referencing the documentation for creating various graph types like line graphs and pie charts, emphasizing the ease of implementation and the return of data and layout.', 'The caching system optimizes SQL queries, reducing time taken for queries, such as the 10,000-poll query.', 'FTS from SQLite achieves significant gains in query performance for word searches within columns.', 'Addressing the challenge of making specific terms clickable effectively is highlighted.', 'Code issues, like iterating over external CSS instead of JS, need to be fixed.', 'Clear guidance is provided for deploying the code and ensuring its proper functioning.', 'Encouragement for feedback and suggestions to improve the design and functionality is emphasized.']}