Add module docstring title to all files

src/collect_others.py

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-"""
+"""CSC110 Fall 2021 Project
 This module uses web requests to collect and process other data we are using in our analysis.
 """
 

src/collect_twitter.py

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-"""
+"""CSC110 Fall 2021 Project
 This module interacts directly with the Twitter API to download tweets and users.
 It contains functions related scraping users/tweets, including:
 - getting the tweets of a user

src/constants.py

@@ -1,4 +1,4 @@
-"""
+"""CSC110 Fall 2021 Project
 This module stores constant variables in our projects.
 
 Instructors said that we can use global constants: https://piazza.com/class/ksovzjrlsye72f?cid=1664

src/main.py

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-"""
+"""CSC110 Fall 2021 Project
 This module is the main module of our program which runs different functions in different modules
 by steps.
 """

src/processing.py

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-"""
+"""CSC110 Fall 2021 Project
 Processes data downloaded from the Twitter API. Processing consists of calculating popularity of
 users, creating samples of users, filtering news channels, and processing tweets for file storage.
 """

src/report.py

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-"""
+"""CSC110 Fall 2021 Project
 This module generates report HTML and serves it in an HTTP server.
 """
 

src/utils.py

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-"""
+"""CSC110 Fall 2021 Project
 This module contains useful functions and classes, including:
 - debug messages
 - file I/O

src/visualization.py

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-"""
+"""CSC110 Fall 2021 Project
 This module uses matplotlib to visualize processed data as graphs. The results are stored in
 report directory.
 The graphs are created after processing the data, for example with filtering and removing outliers.