#!/usr/bin/env python
"""latexcount.py: program to count the number real words in a .tex file. 
SYNTAX: latexcount.py FILENAME"""

import sys, string

if len(sys.argv) < 2:
  print __doc__
  sys.exit(0)

filename = sys.argv[1]

f = open(filename,'r')  
lines = f.readlines()
f.close()

wc = 0
ignore = 0
brace = 0
math = 0

for line in lines:
  if line[0] != '%':
    words = string.split(line)  
    for word in words:
      if word[0:6] == "\\begin":
        ignore = 1
      if word[0] == '$':
        math = 1
      if ignore == 0 and brace == 0 and math == 0:
        if word[0:2] != "{\\" and word != "--":
          if word[0] != "\\":
            wc = wc + 1
          else:
            if string.count(word,"{") != 0:
              brace = 1
      if brace == 1:
        if string.count(word,"}") != 0:
          brace = 0
      if word[0:4] == "\\end":
        ignore = 0
      if string.count(word,"$", 1) != 0:
        math = 0  
print wc