python runtime_error ai_generated true

ValueError: assignment destination is read-only

ID: python/numpy-array-not-writeable

Also available as: JSON · Markdown · 中文
80%Fix Rate
88%Confidence
0Evidence
2025-01-14First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
3.x active — — —

Root Cause

Array is read-only (e.g., from np.broadcast_to or a view backed by immutable buffer).

generic

中文

数组为只读（例如来自 np.broadcast_to 或不可变缓冲区视图）。

Workarounds

  1. 95% success 
    arr = np.array(arr, copy=True) before mutation
  2. 85% success 
    arr.setflags(write=True) when array is a writable view

Dead Ends

Common approaches that don't work:

  1. 85% fail

    Still read-only; same error

  2. 60% fail

    May raise if buffer is genuinely immutable