文件C中的单词计数错误

import re
from collections import Counter

def count_words(file_path):
    try:
        with open(file_path, 'r', encoding='utf-8') as file:
            text = file.read()
            
            # 使用正则表达式去除标点符号并将文本转换为小写
            words = re.findall(r'\b\w+\b', text.lower())
            
            # 计算单词频率
            word_counts = Counter(words)
            
            return word_counts
    except Exception as e:
        print(f"Error reading file: {e}")
        return None

# 示例用法
file_path = 'C.txt'
word_counts = count_words(file_path)
if word_counts:
    for word, count in word_counts.most_common():
        print(f"{word}: {count}")