用python爬github上星级排名前列的项目报错AttributeError: 'NoneType' object has no attribute 'decode'

代码：

import requests
import pygal
from pygal.style import LightenStyle as ls,LightColorizedStyle as lcs
#执行api调用并存储相应
url = 'https://api.github.com/search/repositories?q=language:python&sort=stars'
r = requests.get(url)
print(r.status_code)
#响应存储在变量中
response_dic = r.json()
#print(response_dic.keys())
print("total:"+str(response_dic["total_count"]))

#respon_dic :所有仓库，是一个列表，有很多字典
respon_dics = response_dic["items"]
print("dics:"+str(len(respon_dics)))
"""找出第一个字典
respon_dic = respon_dics[0]
print("\nkeys:"+str(len(respon_dic)))
for key in sorted(respon_dic.keys()):
print(key)"""

names,plot_dicts = [],[]
for respon_dic in respon_dics:
names.append(respon_dic['name'])
plot_dict = {
'value':respon_dic['stargazers_count'],
'label':respon_dic['description']
}
plot_dicts.append(plot_dict)
#plot_dicts.append(respon_dic['stargazers_count'])
#可视化
my_style= ls('#333366',base_style = lcs)

my_config = pygal.Config()
my_config.x_label_rotation = 45
my_config.show_legend = False
my_config.title_font_size = 24
my_config.label_font_size = 14
my_config.major_label_font_size = 18
my_config.truncate_label = 15
my_config.show_y_guides = False
my_config.width = 1000

chart = pygal.Bar(my_config,style = my_style)
chart.title = "most stared python projects on github"
chart.x_labels= names

chart.add('',plot_dicts)
chart.render_to_file("python_respon.svg")

报错：

Traceback (most recent call last):

  File "F:\workspace\python\api\python_request.py", line 62, in <module>

    chart.render_to_file("python_respon.svg")

  File "C:\Users\zawdcxs\AppData\Local\Programs\Python\Python36\lib\site-packages\pygal\graph\public.py", line 114, in render_to_file

    f.write(self.render(is_unicode=True, **kwargs))

  File "C:\Users\zawdcxs\AppData\Local\Programs\Python\Python36\lib\site-packages\pygal\graph\public.py", line 52, in render

    self.setup(**kwargs)

  File "C:\Users\zawdcxs\AppData\Local\Programs\Python\Python36\lib\site-packages\pygal\graph\base.py", line 217, in setup

    self._draw()

  File "C:\Users\zawdcxs\AppData\Local\Programs\Python\Python36\lib\site-packages\pygal\graph\graph.py", line 933, in _draw

    self._plot()

  File "C:\Users\zawdcxs\AppData\Local\Programs\Python\Python36\lib\site-packages\pygal\graph\bar.py", line 146, in _plot

    self.bar(serie)

  File "C:\Users\zawdcxs\AppData\Local\Programs\Python\Python36\lib\site-packages\pygal\graph\bar.py", line 116, in bar

    metadata)

  File "C:\Users\zawdcxs\AppData\Local\Programs\Python\Python36\lib\site-packages\pygal\util.py", line 233, in decorate

    metadata['label'])

  File "C:\Users\zawdcxs\AppData\Local\Programs\Python\Python36\lib\site-packages\pygal\_compat.py", line 61, in to_unicode

    return string.decode('utf-8')

AttributeError: 'NoneType' object has no attribute 'decode'

仔细校对和书上的对比过都打的一样了，还是报错。。

最后看到关键3行：

metadata['label'])

return string.decode('utf-8')

AttributeError: 'NoneType' object has no attribute 'decode'

”空类型“对象没有属性“decode”

应该是label属性 期望是个字符串？

for respon_dic in respon_dics:

    names.append(respon_dic['name'])

    plot_dict = {

        'value':respon_dic['stargazers_count'],

        'label':respon_dic['description']

        }

    plot_dicts.append(plot_dict)

    #plot_dicts.append(respon_dic['stargazers_count'])

里面'label':respon_dic['description']改为'label':str(respon_dic['description'])

搞定。

效果：