Iam trying to perform pass by reference in python but it is not working
def fun(x,y,z):
x=5
y=5
z=6
x=1
y=2
z=3
fun(x,y,z)
print(x,y,z)
The output that I get is
(1, 2, 3)
The output that I expected was
(5, 5, 6)
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Anoop saju
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Simple data types (such as ints and floats) are _not_ passed by reference in Python. They are passed by value. – DYZ Jul 18 '17 at 05:11
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@DYZ How can I pass by reference for such data types – Anoop saju Jul 18 '17 at 05:13
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All passing is by value in Python, but the value is a reference to an object. Search this site for questions about Python passing by value and reference (or "pass by object") for much more information. – BrenBarn Jul 18 '17 at 05:14
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Do this: `global x, y, z` – Ricky Han Jul 18 '17 at 05:16
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@RickyHan s solution does work however it can sometimes be considered bad practice having global variables since they can cause unforeseen side effects if there is a nameclash – mattjegan Jul 18 '17 at 05:25
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1You can not change immutable object inside function. That's it. – Rahul Jul 18 '17 at 05:25
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1@mattjegan OP don't do this: https://xkcd.com/292/ – Ricky Han Jul 18 '17 at 05:32
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@Rahul So is there no other solution other than using a list for passing parameters – Anoop saju Jul 18 '17 at 05:34