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bpo-29869: Allow underscores in numeric literals in lib2to3. (GH-1119)

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* Allow underscores in numeric literals in lib2to3.
* Stricter literal parsing for Python 3.6 in lib2to3.pgen2.tokenize.
* Add test case for underscores in literals in Python 3.
This commit is contained in:
Nevada Sanchez 2017-04-13 13:32:54 -04:00 • committed by Mariatta
parent 873ef20d00
commit a6e395dffa
2 changed files with 30 additions and 8 deletions
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22
Lib/lib2to3/tests/data/py3_test_grammar.py
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@ -72,6 +72,28 @@ class TokenTests(unittest.TestCase):
x = 0b100000000000000000000000000000000000000000000000000000000000000000000
x = 0B111111111111111111111111111111111111111111111111111111111111111111111
def testUnderscoresInNumbers(self):
# Integers
x = 1_0
x = 123_456_7_89
x = 0xabc_123_4_5
x = 0X_abc_123
x = 0B11_01
x = 0b_11_01
x = 0o45_67
x = 0O_45_67
# Floats
x = 3_1.4
x = 03_1.4
x = 3_1.
x = .3_1
x = 3.1_4
x = 0_3.1_4
x = 3e1_4
x = 3_1e+4_1
x = 3_1E-4_1
def testFloats(self):
x = 3.14
x = 314.