python 用字典计数

Posted 2021-05-09

name = input("Enter file:")
if len(name) < 1 : name = "mbox-short.txt"
handle = open(name)

lst = list()

for line in handle :
    line = line.rstrip()
    if not line.startswith("From:") : continue
    words = line.split()
#    print(words[1])
    lst.append(words[1])
#    print(lst)

di = dict()    

for word in lst : 
    di[word] = di.get(word, 0) + 1

maxval = -1
maxkey = None

for key, val in di.items() :
    if val > maxval :
        maxval = val
        maxkey = key

print(maxkey, maxval)