python浮点到int转换 [英] python float to in int conversion

问题描述

我有一个问题让我很生气通常做 int（20.0）会导致 20 。到现在为止还挺好。但是：

$ $ p $ levels = [int（gex_dict [i]）in sort（gex_dict.keys（））]


while gex_dict [i] 返回一个浮点数，例如 20.0 ，结果是：

  base 10：'20 .0'
  

我只是啃一下键盘的最后一块。

解决方案

'20 .0'是一个字符串，不是浮;你可以通过错误信息中的单引号来判断。你可以先用 float 解析 int ，然后用 int ：

 >>> int（float（'20 .0'））
 20 
  

在你的字典中存储花车而不是字符串，因为这是你期望的。）

I have an issue that really drives me mad. Normally doing int(20.0) would result in 20. So far so good. But:

levels = [int(gex_dict[i]) for i in sorted(gex_dict.keys())]

while gex_dict[i] returns a float, e.g. 20.0, results in:

"invalid literal for int() with base 10: '20.0'"

I am just one step away from munching the last piece of my keyboard.

解决方案

'20.0' is a string, not a float; you can tell by the single-quotes in the error message. You can get an int out of it by first parsing it with float, then truncating it with int:

>>> int(float('20.0'))
20

(Though maybe you'd want to store floats instead of strings in your dictionary, since that is what you seem to be expecting.)

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