use two items as key to create dictionary python [duplicate]

Question

Possible Duplicate:
How do I make a dictionary with multiple keys to one value?

I have 5 columns of data,

 usermac, useragent, area ,videoid, number of requests 

I want to use both (usermac,useragent) as key to create a dictionary, since unique combination of (usermac, useragent) represents a unique user.

so the dictionary would be like:

 usermac1, useragent1: area1, videoid1, 10                        area1, videoid2, 29  usermac1, useragent2: area1, videoid1, 90                        area1, videoid2, 34                          ... 

I only know how to create a dictionary with only one item as key. so can anyone help?

my code is:

    for line in fd_in.readlines():         (mac, useragent, area, videoid, reqs) = line.split()      video_dict = d1.setdefault((mac,useragent) {})     video_dict.setdefault(videoid, []).append(float(reqs)) 

and it has syntax error:

    video_dict = d1.setdefault((mac,useragent) {}) 

Answer 1

You can use any (hashable) object as a key for a python dictionary, so just use a tuple containing those two values as the key.

Answer 2

I believe you can use a tuple as the key for the dictionary. So you'd have

mydict = {} mydict[(usermac1,useragent1)] = [ [area1, videoid1, 10],[area1,videoid2,29]... ]