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十七章课后练习
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‎chapter17/17-1.py‎

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import requests
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import pygal
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from pygal.style import LightColorizedStyle as LCS, LightenStyle as LS
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# Make an API call, and store the response.
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url = 'https://api.github.com/search/repositories?q=language:javascript&sort=stars'
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r = requests.get(url)
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print("Status code:", r.status_code)
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# Store API response in a variable.
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response_dict = r.json()
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print("Total repositories:", response_dict['total_count'])
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# Explore information about the repositories.
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repo_dicts = response_dict['items']
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names, plot_dicts = [], []
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for repo_dict in repo_dicts:
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names.append(repo_dict['name'])
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# When a project is removed, it's still listed with stars.
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# So it's in the top projects, but has no description. The description
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# is None, which causes an exception when being used as a label.
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if repo_dict['description']:
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desc = repo_dict['description']
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else:
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desc = 'No description provided.'
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plot_dict = {
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'value': repo_dict['stargazers_count'],
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'label': desc,
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'xlink': repo_dict['html_url'],
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}
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plot_dicts.append(plot_dict)
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# Make visualization.
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my_style = LS('#333366', base_style=LCS)
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my_style.title_font_size = 24
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my_style.label_font_size = 14
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my_style.major_label_font_size = 18
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my_config = pygal.Config()
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my_config.x_label_rotation = 45
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my_config.show_legend = False
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my_config.truncate_label = 15
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my_config.show_y_guides = False
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my_config.width = 1000
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chart = pygal.Bar(my_config, style=my_style)
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chart.title = 'Most-Starred JavaScript Projects on GitHub'
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chart.x_labels = names
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chart.add('', plot_dicts)
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chart.render_to_file('js_repos.svg')

‎chapter17/17-2.py‎

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import requests
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import pygal
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from pygal.style import LightColorizedStyle as LCS, LightenStyle as LS
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from operator import itemgetter
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# Make an API call, and store the response.
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url = 'https://hacker-news.firebaseio.com/v0/topstories.json'
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r = requests.get(url)
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print("Status code:", r.status_code)
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# Process information about each submission.
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submission_ids = r.json()
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submission_dicts = []
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for submission_id in submission_ids[:30]:
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# Make a separate API call for each submission.
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url = ('https://hacker-news.firebaseio.com/v0/item/' +
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str(submission_id) + '.json')
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submission_r = requests.get(url)
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print(submission_r.status_code)
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response_dict = submission_r.json()
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submission_dict = {
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'title': response_dict['title'],
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'link': 'http://news.ycombinator.com/item?id=' + str(submission_id),
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'comments': response_dict.get('descendants', 0)
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}
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submission_dicts.append(submission_dict)
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submission_dicts = sorted(submission_dicts, key=itemgetter('comments'),
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reverse=True)
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for submission_dict in submission_dicts:
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print("\nTitle:", submission_dict['title'])
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print("Discussion link:", submission_dict['link'])
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print("Comments:", submission_dict['comments'])
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titles, plot_dicts = [], []
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for submission_dict in submission_dicts:
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titles.append(submission_dict['title'])
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plot_dict = {
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'value': submission_dict['comments'],
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'label': submission_dict['title'],
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'xlink': submission_dict['link'],
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}
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plot_dicts.append(plot_dict)
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# Make visualization.
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my_style = LS('#333366', base_style=LCS)
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my_style.title_font_size = 24
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my_style.label_font_size = 14
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my_style.major_label_font_size = 18
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my_config = pygal.Config()
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my_config.x_label_rotation = 45
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my_config.show_legend = False
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my_config.truncate_label = 15
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my_config.show_y_guides = False
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my_config.width = 1000
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my_config.y_title = 'Number of Comments'
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chart = pygal.Bar(my_config, style=my_style)
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chart.title = 'Most Active Discussions on Hacker News'
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chart.x_labels = titles
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chart.add('', plot_dicts)
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chart.render_to_file('hn_discussions.svg')

‎chapter17/17-3.py‎

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import unittest
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import python_repos_for_testing as pr
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class PythonReposTestCase(unittest.TestCase):
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"""Tests for python_repos.py."""
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def setUp(self):
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"""Call all the functions here, and test elements separately."""
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self.r = pr.get_response()
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self.repo_dicts = pr.get_repo_dicts(self.r)
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self.repo_dict = self.repo_dicts[0]
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self.names, self.plot_dicts = pr.get_names_plot_dicts(self.repo_dicts)
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def test_get_response(self):
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"""Test that we get a valid response."""
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self.assertEqual(self.r.status_code, 200)
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def test_repo_dicts(self):
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"""Test that we're getting the data we think we are."""
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# We should get dicts for 30 repositories.
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self.assertEqual(len(self.repo_dicts), 30)
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# Repositories should have required keys.
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required_keys = ['name', 'owner', 'stargazers_count', 'html_url']
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for key in required_keys:
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self.assertTrue(key in self.repo_dict.keys())
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unittest.main()

‎chapter17/python_repos.py‎

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import requests
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import pygal
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from pygal.style import LightColorizedStyle as LCS, LightenStyle as LS
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from operator import itemgetter
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# Make an API call, and store the response.
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url = 'https://hacker-news.firebaseio.com/v0/topstories.json'
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r = requests.get(url)
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print("Status code:", r.status_code)
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# Process information about each submission.
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submission_ids = r.json()
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submission_dicts = []
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for submission_id in submission_ids[:30]:
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# Make a separate API call for each submission.
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url = ('https://hacker-news.firebaseio.com/v0/item/' +
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str(submission_id) + '.json')
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submission_r = requests.get(url)
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print(submission_r.status_code)
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response_dict = submission_r.json()
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submission_dict = {
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'title': response_dict['title'],
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'link': 'http://news.ycombinator.com/item?id=' + str(submission_id),
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'comments': response_dict.get('descendants', 0)
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}
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submission_dicts.append(submission_dict)
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submission_dicts = sorted(submission_dicts, key=itemgetter('comments'),
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reverse=True)
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for submission_dict in submission_dicts:
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print("\nTitle:", submission_dict['title'])
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print("Discussion link:", submission_dict['link'])
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print("Comments:", submission_dict['comments'])
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titles, plot_dicts = [], []
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for submission_dict in submission_dicts:
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titles.append(submission_dict['title'])
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plot_dict = {
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'value': submission_dict['comments'],
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'label': submission_dict['title'],
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'xlink': submission_dict['link'],
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}
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plot_dicts.append(plot_dict)
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# Make visualization.
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my_style = LS('#333366', base_style=LCS)
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my_style.title_font_size = 24
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my_style.label_font_size = 14
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my_style.major_label_font_size = 18
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my_config = pygal.Config()
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my_config.x_label_rotation = 45
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my_config.show_legend = False
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my_config.truncate_label = 15
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my_config.show_y_guides = False
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my_config.width = 1000
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my_config.y_title = 'Number of Comments'
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chart = pygal.Bar(my_config, style=my_style)
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chart.title = 'Most Active Discussions on Hacker News'
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chart.x_labels = titles
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chart.add('', plot_dicts)
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chart.render_to_file('hn_discussions.svg')

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