wordcount.py

python web programming 部分

counter = {}                    # create empty directory
file = open("walrus.txt")       # open file for input
while 1:                        # forever ...
    line = file.readline()      # read the next line
    if line == "":              # end of file?
        break                   # yes: terminate loop
    for w in line.split():      # for each word in the line
        if counter.has_key(w):  # have we seen this word before?
            counter[w] += 1     # yes: add one to its count
        else:
            counter[w] = 1      # no:  establish count of one
file.close()                    # tidy up
  
words = counter.keys()          # extract a list of words found
words.sort()                    # sort the list
for w in words:                 # for each word in the list
    print w, counter[w]         # print the word and its count