python - 计算多个文本文件中单词列表的出现次数

Question

我有一个单词列表:

words = ["hello","my","name"]
files = ["file1.txt","file2.txt"]

我想要的是计算所有文本文件中列表中每个单词的出现次数。
我到目前为止的工作:

import re 
occ = []
for file in files:
 try:
   fichier = open(file, encoding="utf-8")
 except:
   pass
 data = fichier.read()
 for wrd in words:
    count = sum(1 for _ in re.finditer(r'\b%s\b' % re.escape(wrd), data))
    occ.append(wrd + " : " + str(count))
 texto = open("occurence.txt", "w+b")
for ww in occ:
   texto.write(ww.encode("utf-8")+"\n".encode("utf-8"))

所以这段代码适用于单个文件，但是当我尝试文件列表时，它只给我最后一个文件的结果。

Answer 1

使用字典而不是列表:

import re 
occ = {} # Create an empty dictionary
words = ["hello", "my", "name"]
files = ["f1.txt", "f2.txt", "f3.txt" ]
for file in files:
 try:
   fichier = open(file, encoding="utf-8")
 except:
   pass
else:
 data = fichier.read()
 for wrd in words:
    count = sum(1 for _ in re.finditer(r'\b%s\b' % re.escape(wrd), data))
    if wrd in occ:
        occ[wrd] += count # If wrd is already in dictionary, increment occurrence count 
    else:
        occ[wrd] = count # Else add wrd to dictionary with occurrence count 
 
print(occ)

如果你想把它作为你的问题中的字符串列表:

occ_list = [ f"{key} : {value}" for key, value in occ.items() ]