python實現文件中計算字串出現的次數和字母出現的次數
from collections import counter
import string
import sys
punctuations = string.punctuation + string.whitespace #標點符號和空格（換行，製表符等）
#計算字串中子串的出現次數
def countwords(file):
with open(file,'r') as f:
lines = f.readlines()
words_list=
for line in lines:
words = line.split()
words = [word.strip(punctuations).lower() for word in words] #去除掉單詞開頭或結尾的標點符號及空格，換行等
words_list.extend(words)
counter_dict = counter(words_list) #返回乙個字典，鍵為單詞，值為出現次數
return counter_dict
#計算字串中字元的出現次數
def countword(file):
with open(file,'r') as f:
lines = f.readlines()
d=dict()
for line in lines:
str = line.strip(punctuations)
for everychar in str:
d[everychar]=d.get(everychar,0)+1
return d
if __name__ =='__main__':
print(sys.ar**[0])
counter_dict = countword('python.txt')
for key,value in counter_dict.items():
var = "%s : %s" % (key, value)
print(var)
print("\n")
counter_dict2 = countwords('python.txt')
for key,value in counter_dict2.items():
var = "%s : %s" % (key, value)
print(var)
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