modify a variable out of a

Asked Jun 26 '15 at 14:15

Active Jun 26 '15 at 14:16

Viewed 35 times

I defined distGPX function in a saperated file and I imported it into my main file.

def distGPX(Date, Distance):

    Date1, Distance1 = Date, Distance

    size = len(GPX1)

    for n in range(0, size):
        if '.gpx' not in GPX1[size - n - 1]:

            Date1.pop(size - n - 1)
            Distance1.pop(size - n - 1)


    return Date1, Distance1

In the main file I call function this way

newDate, newDistance = distGPX(Date, Distance)

where Date and Distance were not changed. The problem is that at main program variables Date and Distance are change the same way as Date1 and Distance1.

Anyone can explain me the problem?

edited Jun 26 '15 at 14:16

tobias_k

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asked Jun 26 '15 at 14:15

Paulo Gonçalves

Lists are passed by reference. You have to clone them to use in that way. – Zac Jun 26 '15 at 14:19
See http://stackoverflow.com/questions/2612802/how-to-clone-or-copy-a-list-in-python. – jarmod Jun 26 '15 at 14:20

modify a variable out of a

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