[issue26331] Tokenizer: allow underscores for grouping in numeric literals

[Stefan Behnel]

Stefan Behnel added the comment:

Ah, thanks. Here's my implementation then:

https://github.com/cython/cython/pull/499/files

It seems that tests for valid complex literals are missing. I've added these to the end of the list:

    '1_00_00.5j',
    '1_00_00.5e5',
    '1_00_00j',
    '1_00_00e5_1',
    '1e1_0',
    '.1_4',
    '.1_4e1',
    '.1_4j',

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<http://bugs.python.org/issue26331>
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