how to fix the error in python code?

Question

def main():
    fname = input("Enter name of file: ")
    with open(fname) as inf:
        animalnames, dates, locations = zip(*[line.strip().split(':') for line in inf])

    d = {}
    for animalname, loc in zip(animalname, locations):
        d.setdefault(animalname, []).append(loc)  

    for k, v in d.items():
       print(k, end='\t')
       print(v.count('loc1'), end='\t')
       print(v.count('loc2'))        

main()

i have a txt file name animallog1.txt which contains the following

a01:01-24-2011:s1 
a03:01-24-2011:s2 
a02:01-24-2011:s2 
a03:02-02-2011:s2 
a03:03-02-2011:s1 
a02:04-19-2011:s2 
a01:05-14-2011:s2 
a02:06-11-2011:s2 
a03:07-12-2011:s1 
a01:08-19-2011:s1 
a03:09-19-2011:s1 
a03:10-19-2011:s2 
a03:11-19-2011:s1 
a03:12-19-2011:s2

i would like to use the above data which is in the format animaname:data:location to print the following table:

Number of times each animal visited each station : 
Animal name Station 1 Station 2 
a01         2         1 
a02         0         3 
a03         4         4 
========================================

i have tried and my code is what i have got, but it gives me the error

builtins.UnboundLocalError: local variable 'animalname' referenced before assignment

could someone help me fix this so i can get the desired result.

thefourtheye · Accepted Answer · 2013-11-25 03:25:16Z

5

You might want to refer animalnames here

for animalname, loc in zip(animalnames, locations):

answered Nov 25, 2013 at 3:25

thefourtheye

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1 Comment

rggod Over a year ago

i have another problem now, the table is not showing the right data, as it should contains numbers and not zeros....

Tim Wilder · Accepted Answer · 2013-11-25 04:01:26Z

0

In response to your second question, are you searching for the exact string names of the stations with count?

I see "loc1" and "loc2" are hard-coded into the provided snippet, and am wondering if that is just by way of example, or if the final script uses those instead of "s1" and "s2" or some flexible parameters.

edited Nov 25, 2013 at 4:01

answered Nov 25, 2013 at 3:47

Tim Wilder

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2 Comments

rggod Over a year ago

i am pretty sure that i am not

Tim Wilder Over a year ago

Can you post the snippet that is returning 0 where you expect other numbers, and a short piece of a file you're parsing?

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