问题
Is it possible to declare a number in Python as
a = 35_000
a = 35,000
Neither seem to work of course. How do you emphasize things like these, for clarity in Python? Is it possible?
回答1:
This is actually just now possible in Python 3.6.
You can use the first format that you showed:
a = 35_000
because underscores are now an accepted separator in numbers. (You could even say a = 3_5_00_0, though why would you?)
The second method you showed will actually create a tuple. It's the same as saying:
a = (35, 000) # Which is also the same as (35, 0).
回答2:
Yes, this is possible starting with python 3.6.
PEP 515 adds the ability to use underscores in numeric literals for improved readability. For example:
>>> 1_000_000_000_000_000 1000000000000000 >>> 0x_FF_FF_FF_FF 4294967295
来源：https://stackoverflow.com/questions/43817634/declaring-a-number-in-python-possible-to-emphasize-thousand