python 统计 英文 单词

import sys, os, re

def count_words(text):
# !num !char -> ' '
text = re.sub("\W+", " ", text)

# number -> ' '
text = re.sub("[0-9]", " ", text)

# shrink whitespace
text = re.sub("\s+", " ", text)

return text.count(' ')

def getfiletext(file):
file = open(file, 'rb')
textb = file.read()
file.close()

# ignore gbk
textb = textb.decode('gbk', 'ignore').encode('utf-8')
# bytes -> str
text = bytes.decode(textb, 'utf-8')
return text

def main():
for argv in sys.argv[1:]:
#print(argv)
print (count_words(getfiletext(argv)))

if __name__ == "__main__":
main()