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[3.8] Minor modernization and readability improvement to the tokenizer example (GH-19558) by miss-islington · Pull Request #19661 · python/cpython · GitHub

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[3.8] Minor modernization and readability improvement to the tokenizer example (GH-19558) #19661

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rhettinger merged 1 commit into from
Apr 22, 2020
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[3.8] Minor modernization and readability improvement to the tokenizer example (GH-19558) #19661

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8 changes: 6 additions & 2 deletions Doc/library/re.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -1617,10 +1617,14 @@ The text categories are specified with regular expressions. The technique is
to combine those into a single master regular expression and to loop over
successive matches::

import collections
from typing import NamedTuple
import re

Token = collections.namedtuple('Token', ['type', 'value', 'line', 'column'])
class Token(NamedTuple):
type: str
value: str
line: int
column: int

def tokenize(code):
keywords = {'IF', 'THEN', 'ENDIF', 'FOR', 'NEXT', 'GOSUB', 'RETURN'}
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