CODEWITHSUNDEEP
pythoncoding-stylepep
ComputerFellow
ComputerFellow

Reputation: 12108

Pythonic way of doing this?

I have this code construct:

flag = True
while flag:
    do_something()
    if some_condition:
        flag = False

Is it the best way to do that? Or is there a better pythonic way?

Upvotes: 0

Views: 93

Answers (2)

glglgl
glglgl

Reputation: 91119

def late(cond):
    yield None
    while cond(): yield None

for _ in late(lambda: condition):
    do_something()

Looks weird. What happens here?

The late() generator forst yields a value in order to enter the loop unconditionally. And in every successive loop run, the cond() is checked.

Upvotes: 1

unutbu
unutbu

Reputation: 880399

while True:
    do_something()
    if some_condition: break

or

while not some_condition:
    do_something()

For the second option to be equivalent to the first, some_condition must start as False so do_something() will get called at least once.

Upvotes: 4

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