Django问题：TypeError: unsupported operand type(s) for -: ‘str‘ and ‘float‘

Django问题：TypeError: unsupported operand type(s) for -: ‘str’ and 'float

Traceback (most recent call last):File "C:\Users\ASUS\Anaconda3\lib\site-packages\django\core\handlers\exception.py", line 34, in innerresponse = get_response(request)File "C:\Users\ASUS\Anaconda3\lib\site-packages\django\core\handlers\base.py", line 115, in _get_responseresponse = self.process_exception_by_middleware(e, request)File "C:\Users\ASUS\Anaconda3\lib\site-packages\django\core\handlers\base.py", line 113, in _get_responseresponse = wrapped_callback(request, *callback_args, **callback_kwargs)File "C:\Users\ASUS\Desktop\wstest\app\views.py", line 333, in msg_sendchartpath = getChart(str(summarize))File "C:\Users\ASUS\Desktop\wstest\app\views.py", line 258, in getChartplt.barh(keys, values, color='steelblue')File "C:\Users\ASUS\Anaconda3\lib\site-packages\matplotlib\pyplot.py", line 2725, in barhret = ax.barh(bottom, width, height=height, left=left, **kwargs)File "C:\Users\ASUS\Anaconda3\lib\site-packages\matplotlib\axes\_axes.py", line 2285, in barhbottom=bottom, orientation='horizontal', **kwargs)File "C:\Users\ASUS\Anaconda3\lib\site-packages\matplotlib\__init__.py", line 1897, in innerreturn func(ax, *args, **kwargs)File "C:\Users\ASUS\Anaconda3\lib\site-packages\matplotlib\axes\_axes.py", line 2108, in barfor i in xrange(len(bottom))]File "C:\Users\ASUS\Anaconda3\lib\site-packages\matplotlib\axes\_axes.py", line 2108, in <listcomp>for i in xrange(len(bottom))]
TypeError: unsupported operand type(s) for -: 'str' and 'float'

解决方法：
错误的原因是第一个参数（x）必需是数字，所以如下修改

x = range(len(keys))
plt.bar(x, values)
plt.xticks(x, keys)#如果改变y轴 则yticks

参考链接

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Django问题：TypeError: unsupported operand type(s) for -: ‘str‘ and ‘float‘

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