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类型有问题是怎么回事？ #4

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maodoudabai opened this issue Apr 19, 2019 · 2 comments
Open

类型有问题是怎么回事？ #4

maodoudabai opened this issue Apr 19, 2019 · 2 comments

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@maodoudabai
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TypeError: float() argument must be a string or a number, not 'NoneType'
请问这个问题怎么解决，拷贝的程序一点没改，请各位走过路过的大神帮我解答下，困惑了好久了，谢谢！
@PENGZhaoqing
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PENGZhaoqing commented Apr 20, 2019 •
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float(x)表示把x变量变成float型，这里的错误是指x为空值

@maodoudabai
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maodoudabai commented Apr 21, 2019 via email

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@PENGZhaoqing @maodoudabai