#### 统计一个文本文件里各单词出现的次数
#### 单词简单定义为空白字符分隔的连续非空白字符
def textstat (infname, statfile):
    worddict = {}
    textfile = open(infname)

    for line in textfile:
        wordlist = line.split()
        for word in wordlist:
            if word in worddict:
                worddict[word] += 1
            else:
                worddict[word] = 1
    textfile.close()

    outfile = open(statfile, "w")
    for word in sorted(worddict.keys()):
        outfile.write(word + ", " + str(worddict[word]) + "\n")
    outfile.close()
#### end of textstat

if __name__ == "__main__":
    textstat("sun1.txt", "sun-data.txt")
    print("Finished, and the result is in sun-data.txt.")