python统计文本文件内单词数量的方法

# count lines,sentences,and words of a text file
# set all the counters to zero
lines,blanklines,words = 0,0
print '-' * 50
try:
 # use a text file you have,or google for this one ...
 filename = 'GettysburgAddress.txt'
 textf = open(filename,'r')
except IOError:
 print 'Cannot open file %s for reading' % filename
 import sys
 sys.exit(0)
# reads one line at a time
for line in textf:
 print line,# test
 lines += 1
 if line.startswith('n'):
  blanklines += 1
 else:
  # assume that each sentence ends with . or ! or ?
  # so simply count these characters
  sentences += line.count('.') + line.count('!') + line.count('?')
  # create a list of words
  # use None to split at any whitespace regardless of length
  # so for instance double space counts as one space
  tempwords = line.split(None)
  print tempwords # test
  # word total count
  words += len(tempwords)
textf.close()
print '-' * 50
print "Lines   : ",lines
print "Blank lines: ",blanklines
print "Sentences : ",sentences
print "Words   : ",words
# optional console wait for keypress
from msvcrt import getch
getch()