token-utils
Installation: pip install token-utils.
The purpose of token-utils is to simplify manipulations of tokens normally obtaind from Python's tokenize module. One of token-utils' features is that, unlike Python's version, the following is always guaranteed:
from token_utils import tokenize, untokenize
source = "Arbitrary Python code here"
assert source == untokenize(tokenize(source))
To get an idea of the simplicity of using token-utils, consider this example from Python's standard library which substitute Decimals for floats in a string of statements:
from tokenize import tokenize, untokenize, NUMBER, STRING, NAME, OP
from io import BytesIO
def decistmt(s):
result = []
g = tokenize(BytesIO(s.encode('utf-8')).readline) # tokenize the string
for toknum, tokval, _, _, _ in g:
if toknum == NUMBER and '.' in tokval: # replace NUMBER tokens
result.extend([
(NAME, 'Decimal'),
(OP, '('),
(STRING, repr(tokval)),
(OP, ')')
])
else:
result.append((toknum, tokval))
return untokenize(result).decode('utf-8')
Here's how you could achieve the same result with token-utils:
from token_utils import tokenize, untokenize
def decistmt(source):
tokens = tokenize(source)
for token in tokens:
if token.is_float():
token.string = f"Decimal('{token.string}')"
return untokenize(tokens)
See the documentation for more information.
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Release files for token-utils 0.3.1
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