Python：尝试使用已关闭的 ZIP 存档

Posted 2023-03-06

【中文标题】Python：尝试使用已关闭的 ZIP 存档

【英文标题】：Python: Attempt to use ZIP archive that was already closed

【发布时间】：2021-09-23 04:29:45

【问题描述】：

我想打开一个压缩文件A001-C-002.zip。它引发Attempt to use ZIP archive that was already closed 错误。

from pathlib import Path
import pandas as pd
import zipfile
import os
import sys

path = "./CODEX/input/"

for filename in os.listdir(os.getcwd()):
    with open(os.path.join(os.getcwd(), filename), 'r') as f:
        # Antibody information
        ab = pd.read_excel("HUBMAP B004 codex antibodies metadata.xlsx")
        print(f"Antibody metadata column names:\n ab.columns.values")
        
        # Patient A001
        with zipfile.ZipFile("A001-C-002.zip") as z:
            for filename in z.namelist():
                if not os.path.isdir(filename):
                    for line in z.open(filename):
                        print(line)
                    z.close()

追溯：

---------------------------------------------------------------------------
ValueError                                Traceback (most recent call last)
/tmp/ipykernel_4872/558093962.py in <module>
      9             for filename in z.namelist():
     10                 if not os.path.isdir(filename):
---> 11                     for line in z.open(filename):
     12                         print(line)
     13                     z.close()

/usr/lib/python3.8/zipfile.py in open(self, name, mode, pwd, force_zip64)
   1499             raise ValueError("pwd is only supported for reading files")
   1500         if not self.fp:
-> 1501             raise ValueError(
   1502                 "Attempt to use ZIP archive that was already closed")
   1503 

ValueError: Attempt to use ZIP archive that was already closed

【问题讨论】：

你在打印一个文件后调用z.close()，然后它就关闭了:)

您在使用with 时无需致电close()。当你离开区块时它会自动关闭它。

【参考方案1】：

你的麻烦来自代码的最后三行：

                for line in z.open(filename):
                    print(line)
                z.close()

您似乎希望 z.close 调用关闭您在这些行的第一行中打开的文件。但这不是它的作用。 z 是您一直在扫描的整个 zip 存档，当您关闭它时，您将无法再次打开其中包含的任何文件（无论如何都要重新打开整个文件）。

我怀疑你想要更像这样的东西：

with z.open(filename) as file:
    for line in file:
        print(line)

这里我们使用with 语句来处理归档中内部文件的关闭，该文件始终保持打开状态（直到外部with 语句结束）。我为该文件对象命名为file，以便with 语句可以将其交给for 循环。