我有兩個功能。第一個用于獲取文本檔案的路徑串列，第二個用于迭代此路徑串列，然后檢查它們是否包含單詞密碼。但是由于第二個函式中的 Try except 陳述句，我不得不使用遞回來使其繼續運行，除非如果可能在下面提供另一種方法。我的問題是第二個函式中回傳的串列是空的，為什么以及如何修復它？
def search_txt():
"""Function to search the C:\\ for .txt files -> then add them (including full path to file) to a list."""
list_of_txt = []
for dir_path, sub_dir, files in os.walk("C:\\"):
"""Method 1 -> checks the end of the file name (could be used for specific extensions)"""
for file in files:
if file.endswith(".txt"):
list_of_txt.append(os.path.join(dir_path, file))
return list_of_txt
def search_pass_file(list_of_files: list):
"""Function to iterate over each text file, searching if the word "password" is included -> Returns the text
file's path """
list_of_pass = []
if len(list_of_files) != 0:
for i in range(len(list_of_files)):
file = list_of_files.pop()
try:
with open(file, encoding="utf8") as f:
for line in f.readlines():
if "password" in line:
list_of_pass.append(file)
except UnicodeDecodeError:
return search_pass_file(list_of_files)
except PermissionError:
return search_pass_file(list_of_files)
else:
return list_of_pass
if __name__ == '__main__':
myList = search_txt()
print(search_pass_file(myList))
uj5u.com熱心網友回復：
list_of_pass只有當len(list_of_files) == 0（它在 else 塊中）時，您才會回傳。您的 return 陳述句應該在回圈之后發生（應該是while一個順便說一句）
您可以通過將它們放在括號中來排除一行中的多個錯誤：except (UnicodeDecodeError, PermissionError)of except all exceptions（例如，您沒有處理FileNotFoundError）。
我會將您的功能簡化為：
def search_pass_file(list_of_files: list):
"""Function to iterate over each text file, searching if the word "password" is included -> Returns the text
file's path """
list_of_pass = []
while list_of_files:
file = list_of_files.pop()
try:
with open(file, encoding="utf8") as f:
for line in f.readlines():
if "password" in line:
list_of_pass.append(file)
break
except Exception:
list_of_pass = search_pass_file(list_of_files)
return list_of_pass
編輯：同樣在您的 except 塊中，您應該將遞回函式的回傳值附加到，list_of_pass否則您將丟失錯誤發生后找到的檔案。
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標籤：python-3.x 列表 文件 递归 蟒蛇操作系统
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