Question

I have have two list and and I am trying to compare differences in $ amount over a certain amount.

the list are

file1 = ['file1,product1,-1000.56', 'file1,product2,500.43']

file2 = ['file2,product1,-1001.37', 'file2,product2,511.99']

I want to print the differences if over $5 in the below format

file1 product2 500.43
file2 product2 511.99

Difference = $11.56

Product 1 won’t display because it’s less than $5

Is there a good way to do this?

I have tried…

for i in file1:
    i.split(",")

This works to get the list split out but how to I compare the two $ amounts, and display only $5 or more.

If someone could give me a way to compare the two $ amounts over $5 difference I can prob figure out the rest.

Answer 1

use zip() to traverse over both lists:

In [114]: file1 = ['file1,product1,-1000.56', 'file1,product2,500.43']

In [115]: file2 = ['file2,product1,-1001.37', 'file2,product2,511.99']

In [116]: for f1,f2 in zip(file1,file2):
    spl1=f1.split(',')     #returns something like ['file1', 'product2', '500.43']
    spl2=f2.split(',')     #returns something like ['file2', 'product2', '511.99']

    diff=abs(float(spl1[-1])-float(spl2[-1]))  ##use abs() to find the difference

    if diff>5:  
        print " ".join(spl1)                    #use print() as you're on py 3.x 
        print " ".join(spl2)                    #join the lists by " " 
        print "${0}".format(diff)
   .....:         
   .....:         
file1 product2 500.43
file2 product2 511.99
$11.56