use-comprehension¶

Collection: fixit-extra Autofix: No Python: Any

Prefer comprehensions over unnecessary collection constructor calls.

Message template¶

Replace this {func}() call with the equivalent comprehension.

Placeholder values are filled in when the violation is reported.

[val for val in iterable]

{val for val in iterable}

{val: val+1 for val in iterable}

dict(line.strip().split('=', 1) for line in attr_file)

def list(value):
    return value

list(val for val in iterable)

list(val for val in iterable)

list(val for row in matrix for val in row)

set(val for val in iterable)

dict((x, f(x)) for val in iterable)

dict((x, y) for y, x in iterable)

dict([val, val+1] for val in iterable)

dict((x["name"], json.loads(x["data"])) for x in responses)

dict((k, v) for k, v in iter for iter in iters)

set([val for val in iterable])

dict([[val, val+1] for val in iterable])

dict([(x, f(x)) for x in foo])

dict([(x, y) for y, x in iterable])

set([val for row in matrix for val in row])