import sys import re
WORD_RE = re.compile('\w+')
index = {} with open(sys.argv[1], encoding='utf-8') as fp: for line_no, line in enumerate(fp, 1): for match in WORD_RE.finditer(line): word = match.group() column_no = match.start()+1 location = (line_no, column_no) index.setdefault(word, []).append(location) # <1>
for word in sorted(index, key=str.upper): print(word, index[word])