Python程序重复运行无反应：如何解决批量文件处理程序在第二次运行时无响应的问题？

<code class="python">import os
import re
import csv

aa_codes = {'ala':'a','cys':'c','asp':'d','glu':'e',
'phe':'f','gly':'g','his':'h','lys':'k','ile':'i',
'leu':'l','met':'m','asn':'n',
'pro':'p','gln':'q','arg':'r',
'ser':'s','thr':'t','val':'v','tyr':'y','trp':'w'}

def file_name(files):
    lst = []
    files = os.listdir(file_dir)
    for file in files:
        lst.append(file)
    return lst

file_dir='d:\python代码\new - 副本'  # 请确保此路径正确
files=file_name(file_dir)

#对文件进行批量操作
def get_file(files):
    for file in files:
        try:
            with open(os.path.join(file_dir, file), 'r') as f: # 使用os.path.join避免路径问题
                txts = f.readlines()
                # ... (此处代码逻辑有误，需要修正，见下文) ...
        except Exception as e:
            print(f"Error processing file {file}: {e}")


# ... (修正后的get_file函数逻辑，见下文) ...

print('ok')
get_file(files) # 添加get_file函数调用</code>

<code class="python">def get_file(files):
    for file in files:
        try:
            with open(os.path.join(file_dir, file), 'r') as f:
                txts = f.readlines()
                # 去除重复行
                unique_txts = []
                for line in txts:
                    if line not in unique_txts:
                        unique_txts.append(line)

                res1 = []
                for line in unique_txts:
                    parts = re.split(r's*,s*', line.strip()) # 使用更稳健的分割方式
                    if len(parts) >= 6 and parts[3] in aa_codes: # 增加判断条件避免索引错误
                        res1.append(aa_codes[parts[3]])

            with open(os.path.join(file_dir, file + '.csv'), 'w', newline='') as csvfile: # 添加newline=''避免空行
                writer = csv.writer(csvfile)
                writer.writerow(res1)

        except Exception as e:
            print(f"Error processing file {file}: {e}")
</code>