使用tuple统计文件中单词的个数

 1 name = input("Enter file:")
 2 if len(name) < 1 : name = "input.txt"
 3 fhand = open(name)
 4 
 5 counts = dict()
 6 for line in fhand:
 7     words = line.split()
 8     for word in words:
 9         # find the value that key is word, if not, return 0
10         counts[word] = counts.get(word, 0) + 1
11 
12 lst = list()
13 for key, val in counts.items():
14     lst.append( (val, key) )
15 
16 lst.sort(reverse = True)
17 for val, key in lst[:10]:
18     print (key, val)