python统计字符串中每个单词出现的次数
import ioimport re
Class Counter:
def __init__(self,path):
self.mapping = dict()
with io.open(path,encoding="utf-8") as f:
data = f.read()
words = [s.lower() for s in re.findall("\w+",data)]
for word in words:
self.mapping[word] = self.mapping.get(word,0) + 1
def most_common(self,n):
assert n > 0, "n should be larger than 0"
return sorted(self.mapping.items(),key=lambda item:item[1],reverse=True)[:n]
if __name__ == "__mian__":
most_common_5 =Counter("importthis.txt").most_common(5)
foritem inmost_common_5:
print(item)
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绛旓細import io import re Class Counter: def __init__(self,path): self.mapping = dict() with io.open(path,encoding="utf-8") as f: data = f...
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绛旓細寰堢畝绛旂殑涓滀笢 import re import collections print( collections.Counter( re.findall( '\w+' ,open( 'test.txt' ).read( ) ) ) )杩樻槸澶氱湅鐪嬭祫鏂欏惂,杩欎釜鏄畼鏂圭殑鏍囧噯绛旀
