Pygal cartography "Attributeerror: ' Nonetype ' object has no attribute ' decode '"

Recently looking at <python into: 17 chapters from Getting started to practice > using the Web Api

17.2.3 based on data drawing

# Coding=utf-8 Import requests import Pygal from Pygal.style import Lightcolorizedstyle as LCS, Lightenstyle as LS # Executive API
Call and store response URL = ' Https://api.github.com/search/repositories?q=language:python&sort=star ' r = Requests.get (URL) Print ("Status code:", R.status_code) # stores the API response in a variable response_dict = R.json () print ("Total repositories:", Response_ dict[' Total_count '] # study the information about the warehouse repo_dicts = response_dict[' items '] print "Number of items:", Len (repo_dicts) Names,plot _dicts=[],[] for repo_dict in Repo_dicts:names.append (repo_dict[' name ']) if repo_dict[' description ': PLO t_dict={' value ': repo_dict[' stargazers_count ', ' label ': repo_dict[' description '], ' XL Ink ': repo_dict[' Html_url ']} plot_dicts.append (plot_dict) else:plot_dict={' value ':
        repo_dict[' Stargazers_count '], ' label ': ' ABC ', ' xlink ': repo_dict[' Html_url ']} Plot_dicts.append (plot_dict) # visualization My_style = LS (' #333366 ', Base_style=lcs) chart = Pygal. Bar (Style=my_style, x_label_rotation=45, show_legend=false) chart.title = ' most-starred Python Projects on GitHub ' chart . x_labels = Names Chart.add (', plot_dicts) print plot_dicts chart.render_to_file (' python_repos.svg ')

The code above is a little different from the book, mainly

For repo_dict in repo_dicts:
    names.append (repo_dict[' name '])
    if repo_dict[' description ':
        plot_dict={' Value ': repo_dict[' Stargazers_count '],
                   ' label ': repo_dict[' description ',
                   ' xlink ': repo_dict[' Html_url ']
                   }
        Plot_dicts.append (plot_dict)
    else:
        plot_dict={' value ': repo_dict[' Stargazers_count '],
                   ' label ': ' ABC ' ,
                   ' xlink ': repo_dict[' Html_url ']}
        plot_dicts.append (plot_dict)

Why add this paragraph.

According to the book, the following error

Traceback (most recent): File "c:/users/vivi01.zhu/pycharmprojects/untitled2/python_repos.py", line ;module> chart.render_to_file (' python_repos.svg ') file "C:\Python27\lib\site-packages\pygal\graph\public.py", Line 114, in Render_to_file f.write (Self.render (Is_unicode=true, **kwargs)) file "C:\Python27\lib\site-packages\pyga l\graph\public.py ", line-render Self.setup (**kwargs) File" C:\Python27\lib\site-packages\pygal\graph\base.py "
    , line 217, in the Setup self._draw () File "C:\Python27\lib\site-packages\pygal\graph\graph.py", line 933, in _draw Self._plot () file "C:\Python27\lib\site-packages\pygal\graph\bar.py", line 146, in _plot self.bar (serie) file "C:\ python27\lib\site-packages\pygal\graph\bar.py ", line 116, in bar metadata) File" C:\Python27\lib\site-packages\pygal \util.py ", line 233, in decorate metadata[' label ') File" C:\Python27\lib\site-packages\pygal\_compat.py ", line 61, In To_unicode return StRing.decode (' Utf-8 ') attributeerror: ' Nonetype ' object has no attribute ' decode ' 

Plot_dicts that need to be shown on the diagram can be printed and normal

The guess is that there is a parameter (Repo_dict's description) of None, no attributes, a if--else judge of whether this parameter is none, run through, bingo~

(' Status code: ')
(' Total repositories: ', 1923446)
Number of items:30
[{' XLink ': U ' https://github.com/vinta/awesome-python ', ' value ': 38175, ' label ': U ' A curated list of awesome Python frameworks, libraries, software and resources} ......... {' XLink ': U ' https://github.com/drduh/macOS-Security-and-Privacy-Guide ', ' value ': 11824, ' label ': U ' A practical Guide to securing MacOS. '}]

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