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Anuoluwapo Balogun
Anuoluwapo Balogun

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Web Scraping GitHub Page

Use Request Library to download webpages 

import requests
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topics_url = 'https://github.com/topics'
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response = requests.get(topics_url)
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response.status_code
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200

len(response.text)
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177177

page_contents = response.text
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page_contents[:1000]
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'\n\n<!DOCTYPE html>\n<html lang="en" data-color-mode="auto" data-light-theme="light" data-dark-theme="dark">\n <head>\n <meta charset="utf-8">\n <link rel="dns-prefetch" href="https://github.githubassets.com">\n <link rel="dns-prefetch" href="https://avatars.githubusercontent.com">\n <link rel="dns-prefetch"....

Write page as a file 

with open('webpage.html', 'wb') as f:
    f.write(page_contents.encode("utf8"))
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Parse and extract information 

from bs4 import BeautifulSoup
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doc = BeautifulSoup(page_contents, 'html.parser')
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selection_class = 'f3 lh-condensed mb-0 mt-1 Link--primary'

topic_title_tags = doc.find_all('p', {'class': selection_class})
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len(topic_title_tags)
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30

topic_title_tags[:5]
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[<p class="f3 lh-condensed mb-0 mt-1 Link--primary">3D</p>,
<p class="f3 lh-condensed mb-0 mt-1 Link--primary">Ajax</p>,
<p class="f3 lh-condensed mb-0 mt-1 Link--primary">Algorithm</p>,
<p class="f3 lh-condensed mb-0 mt-1 Link--primary">Amp</p>,
<p class="f3 lh-condensed mb-0 mt-1 Link--primary">Android</p>]

selection_class = 'f5 color-fg-muted mb-0 mt-1'

topic_desc_tags = doc.find_all('p', {'class': selection_class})
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len(topic_desc_tags)
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30

topic_desc_tags[:5]
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[<p class="f5 color-fg-muted mb-0 mt-1">
3D modeling is the process of virtually developing the surface and structure of a 3D object.
</p>,
<p class="f5 color-fg-muted mb-0 mt-1">
Ajax is a technique for creating interactive web applications.
</p>,
<p class="f5 color-fg-muted mb-0 mt-1">
Algorithms are self-contained sequences that carry out a variety of tasks.
</p>,.....

topic_title_tag0 = topic_title_tags[0]
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div_tag = topic_title_tag0.parent
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topic_link_tags = doc.find_all('a', {'class': 'flex-grow-0'})
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len(topic_link_tags)
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30

topic0_url = "https://github.com" + topic_link_tags[0]['href']
print(topic0_url)
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https://github.com/topics/3d

topic_titles = []


for tag in topic_title_tags:
    topic_titles.append(tag.text)

print(topic_titles)
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['3D', 'Ajax', 'Algorithm', 'Amp', 'Android', 'Angular', 'Ansible', 'API', 'Arduino', 'ASP.NET', 'Atom', 'Awesome Lists', 'Amazon Web Services', 'Azure', 'Babel', 'Bash', 'Bitcoin', 'Bootstrap', 'Bot', 'C', 'Chrome', 'Chrome extension', 'Command line interface', 'Clojure', 'Code quality', 'Code review', 'Compiler', 'Continuous integration', 'COVID-19', 'C++']

topic_descs = []

for tag in topic_desc_tags:
    topic_descs.append(tag.text.strip())

topic_descs[:5]
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['3D modeling is the process of virtually developing the surface and structure of a 3D object.',
'Ajax is a technique for creating interactive web applications.',
'Algorithms are self-contained sequences that carry out a variety of tasks.',
'Amp is a non-blocking concurrency library for PHP.',
'Android is an operating system built by Google designed for mobile devices.']

topic_urls = []
base_url = "https://github.com"

for tag in topic_link_tags:
    topic_urls.append(base_url + tag['href'])

topic_urls
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['https://github.com/topics/3d',
'https://github.com/topics/ajax',
'https://github.com/topics/algorithm',
'https://github.com/topics/amphp',
'https://github.com/topics/android',
'https://github.com/topics/angular',
'https://github.com/topics/ansible',
'https://github.com/topics/api',
'https://github.com/topics/arduino',
'https://github.com/topics/aspnet',
'https://github.com/topics/atom',
'https://github.com/topics/awesome']....

Create CSV FILE 

import pandas as pd
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topics_dict = {
    'title': topic_titles,
    'description': topic_descs,
    'url': topic_urls
}
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topics_df = pd.DataFrame(topics_dict)
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topics_df
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title description url
0 3D 3D modeling is the process of virtually develo... https://github.com/topics/3d
1 Ajax Ajax is a technique for creating interactive w... https://github.com/topics/ajax
2 Algorithm Algorithms are self-contained sequences that c... https://github.com/topics/algorithm
3 Amp Amp is a non-blocking concurrency library for ... https://github.com/topics/amphp
4 Android Android is an operating system built by Google... https://github.com/topics/android
5 Angular Angular is an open source web application plat... https://github.com/topics/angular
6 Ansible Ansible is a simple and powerful automation en... https://github.com/topics/ansible
7 API An API (Application Programming Interface) is ... https://github.com/topics/api
8 Arduino Arduino is an open source hardware and softwar... https://github.com/topics/arduino.....

topics_df.to_csv('topics.csv', index=None)
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Getting information out of a topic page 

topic_page_url = topic_urls[0]
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topic_page_url
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'https://github.com/topics/3d'

response = requests.get(topic_page_url)
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response.status_code
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200

len(response.text)
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662290

topic_doc = BeautifulSoup(response.text, 'html.parser')
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h3_selection_class = "f3 color-fg-muted text-normal lh-condensed"


repo_tags = topic_doc.find_all('h3', {'class': h3_selection_class })
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len(repo_tags)
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30

repo_tags
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[<h3 class="f3 color-fg-muted text-normal lh-condensed">
<a data-ga-click="Explore, go to repository owner, location:explore feed" data-hydro-click='{"event_type":"explore.click","payload":{"click_context":"REPOSITORY_CARD","click_target":"OWNER","click_visual_representation":"REPOSITORY_OWNER_HEADING","actor_id":null,"record_id":97088,"originating_url":"https://github.com/topics/3d","user_id":null}}' data-hydro-click-hmac="4bdbc49d3c05ae7f70b531fbce709a384200b0768554e0172950286a8db30940" data-view-component="true" href="/mrdoob">
mrdoob
</a> /
<a class="text-bold wb-break-word" data-ga-click="Explore, go to repository, location:explore feed" data-hydro-click='{"event_type":"explore.click","payload":{"click_context":"REPOSITORY_CARD","click_target":"REPOSITORY","click_visual_representation":"REPOSITORY_NAME_HEADING","actor_id":null,"record_id":576201,"originating_url":"https://github.com/topics/3d","user_id":null}}' data-hydro-click-hmac="517d3d5cb9d89752156923904a4238816bc9b51ab7772f3e3644ce897d8dd4e5" data-view-component="true" href="/mrdoob/three.js">
three.js....

Write a function that calls out all a tags from repo_tags 

a_tags = repo_tags[0].find_all('a')
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a_tags
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[<a data-ga-click="Explore, go to repository owner, location:explore feed" data-hydro-click='{"event_type":"explore.click","payload":{"click_context":"REPOSITORY_CARD","click_target":"OWNER","click_visual_representation":"REPOSITORY_OWNER_HEADING","actor_id":null,"record_id":97088,"originating_url":"https://github.com/topics/3d","user_id":null}}' data-hydro-click-hmac="4bdbc49d3c05ae7f70b531fbce709a384200b0768554e0172950286a8db30940" data-view-component="true" href="/mrdoob">
mrdoob...]

len(a_tags)
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2

a_tags[0].text.strip()
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'mrdoob'

a_tags[1].text.strip()
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'three.js'

base_url = 'https://github.com'

repo_url = base_url + a_tags[1]['href']
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repo_url
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'https://github.com/mrdoob/three.js'

star_tags = topic_doc.find_all('a', {'class': 'tooltipped tooltipped-s btn-sm btn BtnGroup-item color-bg-default'})
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len(star_tags)
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30

star_tags
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[<a aria-label="You must be signed in to star a repository" class="tooltipped tooltipped-s btn-sm btn BtnGroup-item color-bg-default" data-hydro-click='{"event_type":"authentication.click","payload":{"location_in_page":"star button","repository_id":576201,"auth_type":"LOG_IN","originating_url":"https://github.com/topics/3d","user_id":null}}' data-hydro-click-hmac="b901d0051f5d392e6990ed43be8259b46c6bc69b73fa228065a5b24cb7acf2cf" data-view-component="true" href="/login?return_to=%2Fmrdoob%2Fthree.js" rel="nofollow"> <svg aria-hidden="true" class="octicon octicon-star v-align-text-bottom d-inline-block mr-2" data-view-component="true" height="16" version="1.1" viewbox="0 0 16 16" width="16">
<path d="M8 .25a.75.75 0 01.673.418l1.882 3.815 4.21.612a.75.75 0 01.416 1.279l-3.046 2.97.719 4.192a.75.75 0 01-1.088.791L8 12.347l-3.766 1.98a.75.75 0 01-1.088-.79l.72-4.194L.818 6.374a.75.75 0 01.416-1.28l4.21-.611L7.327.668A.75.75 0 018 .25zm0 2.445L6.615 5.5a.75.75 0 01-.564.41l-3.097.45 2.24 2.184a.75.75 0 01.216.664l-.528 3.084 2.769-1.456a.75.75 0 01.698 0l2.77 1.456-.53-3.084a.75.75 0 01.216-.664l2.24-2.183-3.096-.45a.75.75 0 01-.564-.41L8 2.694v.001z" fill-rule="evenodd"></path>.....

star_tags[0].text
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' \n\n\n Star\n 78.6k\n'

star_tags[0].text.strip('\n\n\n     Star\n')
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'78.6k'

def parse_star_count(stars_str):
    stars_str = stars_str.strip()
    if stars_str[-1] == 'k':
        return int(float(stars_str[:-1]) * 1000)
    return int(stars_str)
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parse_star_count(star_tags[0].text.strip('\n\n\n     Star\n'))
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78600

get_repo_info(repo_tags[0], star_tags[0])
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('mrdoob', 'three.js', 78600, 'https://github.com/mrdoob/three.js')

len(repo_tags) 

def get_repo_info(h3_tag, star_tag):
    # returns all the required information about a respository
    a_tags = h3_tag.find_all('a')
    username = a_tags[0].text.strip()
    repo_name = a_tags[1].text.strip()
    repo_url = base_url + a_tags[1]['href']
    stars = parse_star_count(star_tag.text.strip('\n\n\n     Star\n'))
    return username, repo_name, stars, repo_url
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topic_repos_dict = {
    'username': [],
    'repo_name': [],
    'stars': [],
    'repo_url': []
}


for i in range(len(repo_tags)):
    repo_info = get_repo_info(repo_tags[i], star_tags[i])
    topic_repos_dict['username'].append(repo_info[0])
    topic_repos_dict['repo_name'].append(repo_info[1])
    topic_repos_dict['stars'].append(repo_info[2])
    topic_repos_dict['repo_url'].append(repo_info[3])
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topic_repos_df = pd.DataFrame(topic_repos_dict)
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topic_repos_df
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username repo_name stars repo_url
0 mrdoob three.js 78600 https://github.com/mrdoob/three.js
1 libgdx libgdx 19600 https://github.com/libgdx/libgdx
2 pmndrs react-three-fiber 16600 https://github.com/pmndrs/react-three-fiber
3 BabylonJS Babylon.js 15800 https://github.com/BabylonJS/Babylon.js
4 aframevr aframe 13700 https://github.com/aframevr/aframe
5 ssloy tinyrenderer 12000 https://github.com/ssloy/tinyrenderer
6 lettier 3d-game-shaders-for-beginners 12000 https://github.com/lettier/3d-game-shaders-for...
7 FreeCAD FreeCAD 10600 https://github.com/FreeCAD/FreeCAD
8 metafizzy zdog 9000 https://github.com/metafizzy/zdog
9 CesiumGS cesium 8200 https://github.com/CesiumGS/cesium.....

import os

def get_topic_page(topic_url): 
# Download the page
    response = requests.get(topic_url)
# Check successful response
    if response.status_code != 200:
        raise Exception('Failed to load page {}'.format(topic_url))
# Parse using beautiful soup
    topic_doc = BeautifulSoup(response.text, 'html.parser')
    return topic_doc

def get_repo_info(h3_tag, star_tag):
# Returns all the required information about a respository
    a_tags = h3_tag.find_all('a')
    username = a_tags[0].text.strip()
    repo_name = a_tags[1].text.strip()
    repo_url = base_url + a_tags[1]['href']
    stars = parse_star_count(star_tag.text.strip('\n\n\n     Star\n'))
    return username, repo_name, stars, repo_url

def get_topic_repos(topic_doc):
# Get h3 tags containing, repo title, repo url and username
    h3_selection_class = "f3 color-fg-muted text-normal lh-condensed"
    repo_tags = topic_doc.find_all('h3', {'class': h3_selection_class })

# Get star tags
    star_tags = topic_doc.find_all('a', {'class': 'tooltipped tooltipped-s btn-sm btn BtnGroup-item color-bg-default'})

# Create function name
    topic_repos_dict = {
        'username': [],
        'repo_name': [],
        'stars': [],
        'repo_url': []
    }

# Get repository information
    for i in range(len(repo_tags)):
        repo_info = get_repo_info(repo_tags[i], star_tags[i])
        topic_repos_dict['username'].append(repo_info[0])
        topic_repos_dict['repo_name'].append(repo_info[1])
        topic_repos_dict['stars'].append(repo_info[2])
        topic_repos_dict['repo_url'].append(repo_info[3])

    return pd.DataFrame(topic_repos_dict)

def scrape_topic(topic_url, path):
    if os.path.exists(path):
        print('The file {} already exists. skipping...'.format(path))
        return 

    topic_df = get_topic_repos(get_topic_page(topic_url))

    topic_df.to_csv(path, index=None )
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topic_urls[6]
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'https://github.com/topics/ansible'

get_topic_repos(get_topic_page(topic_urls[6])).to_csv('ansible.csv', index=None)
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def get_topic_titles(doc):
        selection_class = 'f3 lh-condensed mb-0 mt-1 Link--primary'
        topic_title_tags = doc.find_all('p', {'class': selection_class})
        topic_titles = []
        for tag in topic_title_tags:
            topic_titles.append(tag.text)
        return topic_titles

def get_topic_descs(doc):
        selection_class = 'f5 color-fg-muted mb-0 mt-1'
        topic_desc_tags = doc.find_all('p', {'class': selection_class}) 
        topic_descs = []
        for tag in topic_desc_tags:
            topic_descs.append(tag.text.strip())
        return topic_descs

def get_topic_urls(doc):
        topic_link_tags = doc.find_all('a', {'class': 'flex-grow-0'})
        topic_urls = []
        base_url = "https://github.com"
        for tag in topic_link_tags:
            topic_urls.append(base_url + tag['href'])
        return topic_urls


def scrape_topics():
    topics_url = 'https://github.com/topics'
    response = requests.get(topics_url)
    if response.status_code != 200:
        raise Exception('Failed to load page {}'.format(topic_url))
    topics_dict = {
        'title': get_topic_titles(doc),
        'description': get_topic_descs(doc),
        'url': get_topic_urls(doc)
    }

    return pd.DataFrame(topics_dict)
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def scrape_topics_repos():
    print('Scraping list of topics')
    topics_df = scrape_topics()
    # Create a folder
    os.makedirs("data", exist_ok =True)


    for index, row in topics_df.iterrows():
        print('Scraping top repositories for "{}"'.format(row['title']) )
        scrape_topic(row['url'], 'data/{}.csv'.format(row['title']))
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scrape_topics_repos()
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Scraping list of topics
Scraping top repositories for "3D"
The file data/3D.csv already exists. skipping...
Scraping top repositories for "Ajax"
The file data/Ajax.csv already exists. skipping...
Scraping top repositories for "Algorithm"
The file data/Algorithm.csv already exists. skipping...
Scraping top repositories for "Amp"
The file data/Amp.csv already exists. skipping...
Scraping top repositories for "Android".....

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