How can i set default values on the w, d & h?
w, d, h = input("Specify width, depth & height: ").split()
print (w)
print (d)
print (h)
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2 Answers
Explicit is better than implicit:
values = input("Specify width, depth & height: ").split()
w = values[0] if len(values) > 0 else DEFAULT_W
d = values[1] if len(values) > 1 else DEFAULT_D
h = values[2] if len(values) > 2 else DEFAULT_H
But a more extravagant way could be:
values = iter(input("Specify width, depth & height: ").split())
w = next(values, DEFAULT_W)
d = next(values, DEFAULT_D)
h = next(values, DEFAULT_H)
Comments
w, d, h = input("Specify width, depth & height: ").split() or (10, 11, 12)
print (w)
print (d)
print (h)
This sets the values to a default if the user entered nothing, since an empty string will be split to an empty list, which will be evaluated to False.
5 Comments
Urmzd
Simple and sweet. +1
Yevhen Kuzmovych
But will fail if the user enters one or two. But I guess it might be the OP's intention. It's not very clear from the question.
Yevhen Kuzmovych
Also, using
or (...) with a tuple of default values would be more logical, to avoid an unnecessary split of your default values. (and empty list after split would also evaluate to False
Jotha
Yes, it is worth noting that it will also fail if the user enters something nonsensical, like letters. Validation is a whole different task
Jotha
@YevhenKuzmovych +1 You're right, that's better! Didn't think about an empty list also evaluating to false.