python - Splitting Lines and Lines -

so, wondering how split lines of file , put them list? tested out code works 1 segment of list not other chunks:

the file looks like:

rank ballots  riding 0  ndp liberal green cpc  ndp green liberal cpc  cpc liberal green ndp  ndp green liberal cpc   riding 1  ndp liberal green cpc  liberal green ndp cpc  ndp green liberal cpc  liberal green ndp cpc  ndp green liberal cpc 

and forth.

this code first half, riding 0: line = f.readline()

 while line !='':     district = str.split(line)     line = f.readline()     a.append(district) print(a) 

and code did second half:

header = f.readline().rstrip()  riding = f.readline().rstrip() riding = f.readline().rstrip() votes = []  while riding !='':     rank = str.split(riding)     votes = []     while rank != '':         votes.append(rank)         rank = str.split(riding)         riding = f.readline().rstrip()      print(votes)     riding = f.readline().rstrip() 

when print it's blank space. wondering if out. output should lists of lists each riding. so, riding 0: it'd [[line 1], [line 2] etc] , riding 1: [[line 1], [line 2]] etc.

this should solve -

import re  f = open('x.txt') d = [l.strip() l in f.readlines() if l.strip()]  groups   = {} curr_key = '' line in d:     if re.search('riding [0-9]+', line):         curr_key = line         groups[curr_key] = []     elif curr_key:         groups[curr_key].append([line])  print groups  >>> {'riding 1': [['ndp liberal green cpc'], ['liberal green ndp cpc'], ['ndp green liberal cpc'], ['liberal green ndp cpc'], ['ndp green liberal cpc']], 'riding 0': [['ndp liberal green cpc'], ['ndp green liberal cpc'], ['cpc liberal green ndp'], ['ndp green liberal cpc']]}