loop through rows of one csv file to find corresponding data in another

Question

I got an interesting problem:

file1.csv has a few hundred rows like:

Code,DTime
1,2010-12-26 17:01
2,2010-12-26 17:07
2,2010-12-26 17:15

Answer 1

you can create a dictionary from file2, where the key is the prefix of the time you want, and the value is either first row, or all the rows matching this prefix. then it's simply a matter of doing something like:

entries = file2Dict.get(file1Entry)
if entries:
   print  "First entry is %s" entries[0]