Multiple parameter in Python

Question

I am stuck in using multiple parameter through function. I have two files:

1.py

import function
x=2
y=5
print function.power(x,y)

function.py

import math
def power(*x)
return math.pow(x,x)

Whenever i try to pass multiple parameter to power function, it is giving following error:

Traceback (most recent call last):

File "C:\Examples\1.py", line 33, in

print function.power(x,y)

File "c:\Examples\function.py", line 11, in power
return math.pow(x,x)
TypeError: a float is required

This code has at least 2 syntax errors in addition to what you are asking — Matt
– Matt, Commented Jan 31, 2013 at 5:18

mgilson · Accepted Answer · 2013-01-31 05:23:51Z

3

I think you want:

def power(*x):
    return math.pow(*x)

This is a form of argument unpacking. within the power function, x is a tuple which can then be unpacked when passed to another function.

edited Jan 31, 2013 at 5:23

answered Jan 31, 2013 at 5:17

mgilson

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Comments

milkypostman · Accepted Answer · 2013-01-31 06:27:58Z

0

that's because *x is actually making x a list.

You really want to make function.py be:

import math
def power(*x)
    return math.pow(x[0],x[1])

Why do you really want to know how to do this though? It obviously can't be to pointlessly wrap the math.pow function.

answered Jan 31, 2013 at 6:27

milkypostman

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