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.

Metadata

Release files for token-utils 0.3.3

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Source distribution for token-utils 0.3.3
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