树莓派Zero W调用picamera报NameError异常，求解决方案

Hey there, that’s a really odd error—those garbled identifiers like ni7MessageESt5dequeIS2_SaIS2_EEE5frontEvrames6resizeEjj don’t look like valid Python code at all. This usually points to corrupted system files or SD card issues, not a problem with your picamera implementation (since it worked fine for months!). Let’s go through some fixes step by step:

Possible Fixes #

• Reinstall the Python 2.7 core library
  The error originates in /usr/lib/python2.7/numbers.py—a critical standard library file that’s clearly been corrupted. Replace it with a fresh copy by running:

  sudo apt-get install --reinstall python2.7-minimal
  

  This will overwrite any damaged core Python files with clean versions from the repository.

• Refresh your picamera installation
  Even though the error starts in a core file, it’s triggered when importing picamera. Force a reinstall to rule out any corruption in that package:

  sudo pip install --upgrade --force-reinstall picamera
  

• Check your SD card for filesystem corruption
  Raspberry Pi SD cards can develop errors over time, especially if the device was powered off unexpectedly. Here’s how to check:

  1. Safely shut down your Pi, remove the SD card, and connect it to another computer (use an adapter if needed).
  2. Linux: Run fsck on the root partition (usually /dev/sdX2, replace X with your device’s letter):

     sudo fsck /dev/sdX2
     

  3. Windows: Right-click the SD card drive, go to Properties > Tools > Check to run error checking.
  4. macOS: Open Disk Utility, select the SD card, and run First Aid.

• Test with a minimal isolated script
  Create a simple test script to confirm if the issue is system-wide or tied to your main code:

  import picamera
  with picamera.PiCamera() as camera:
      camera.resolution = (1280, 720)
      camera.capture("test_capture.jpg")
  print("Test photo captured successfully!")
  

  Run this directly on your Pi (not via your Android trigger) to see if you get the same error. If this works, the problem might be in how your main script is handling imports or file paths.

• Consider migrating to Python 3 and picamera2
  Python 2.7 is no longer supported (end-of-life since 2020), so it’s more prone to unpatched issues and compatibility problems. If your project can be adjusted, switching to Python 3 and the official picamera2 library (the replacement for the old picamera) will give you better long-term stability.

内容的提问来源于stack exchange，提问作者jerry fa