python / python/cpython

ZipFile.writestr doesn't behave like Path.write_*

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還沒有人認領這個 Issue。

stdlib type-feature
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Python
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描述

Feature or enhancement

Proposal:

Given that ZipPath doesn't provide a write_text or write_bytes, I'm trying to use ZipFile.writestr and noticed that when the data you're trying to write isn't the right type it still stores an empty entry. I didn't expect side effects when it failed this fundamentally to get the data.

import zipfile
with zipfile.ZipFile("foo.zip", "w") as z:
  z.writestr("x", ())
  print(z.namelist()) # -> "x"

Notably, Path.write_text behaves the way I'd expect -- it has to construct a memoryview successfully first before opening the file.

from pathlib import Path
Path("x").write_bytes(()) # -> neither creates nor truncates

@jaraco I assume ZipPath not supporting writes is intentional?

Has this already been discussed elsewhere?

This is a minor feature, which does not need previous discussion elsewhere

Links to previous discussion of this feature:

No response

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研究方向

該 issue 未指定實作檔案或測試。首先重現 zipfile.ZipFile.writestr 範例,並針對無效資料將其與 pathlib.Path.write_bytes 進行比較;檢查標準函式庫中相關的實作與測試。完成的標準是:無效輸入會引發錯誤,但不會建立或截斷封存項目。

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評估

技術堆疊
python
領域
backend
Issue 類型
缺陷
難度
3/5
預估耗時
1-2 天
活躍度
停滯
描述清晰度
基本清楚
新手友好度
45/100

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