为什么 Python3.6 允许这个 float('20200407_2') ？

Question

Does anyone understand why Python 3.6 allows this string '20200407_2' code to be converted?有谁明白为什么 Python 3.6 允许转换此字符串'20200407_2'代码？

>>> float('20200407_2')
202004072.0

Python 2.7 does not allow it. Python 2.7 不允许。

>>> float('20200407_2')
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ValueError: invalid literal for float(): 20200407_2

Answer 1

From the docs :从文档：

Changed in version 3.6: Grouping digits with underscores as in code literals is allowed.在 3.6 版更改: 允许在代码文字中使用下划线对数字进行分组。

I think it answers your question.我认为它回答了你的问题。