TensorFlow风格迁移Demo执行evaluate.py时权限被拒，新手求助

Hey there! Let's work through this permission denied error together—this is a super common hiccup when dealing with file paths and system permissions, especially when you're just getting started. Here are the most likely causes and fixes to try:

1. Verify Input/Output Paths & Permissions #

• First, double-check your <path_to_input_file>:
  • If your input path has spaces (like ~/My Pictures/input.jpg), you must wrap it in quotes or escape the space—otherwise the shell will interpret it as multiple arguments:

    python evaluate.py --checkpoint ./rain-princess.ckpt --in-path "~/My Pictures/input.jpg" --out-path ./output_image.jpg
    

    Or:

    python evaluate.py --checkpoint ./rain-princess.ckpt --in-path ~/My\ Pictures/input.jpg --out-path ./output_image.jpg
    

  • Make sure you have write permission for the directory where you're saving output_image.jpg. If you're trying to save to a system-level directory (like /usr/ or /var/), switch to a directory you own, like your home folder:

    python evaluate.py --checkpoint ./rain-princess.ckpt --in-path <path_to_input_file> --out-path ~/output_image.jpg
    

  • Try using absolute paths instead of relative ones (e.g., /home/your-username/input.jpg instead of ./input.jpg) to avoid path resolution issues that can trigger permission errors.

2. Check Checkpoint File Permissions #

• Confirm that ./rain-princess.ckpt exists and you have read access to it:
  • Run this command to check file details and permissions:

    ls -l ./rain-princess.ckpt
    

  • If you don't have read permissions, update them with this command:

    chmod +r ./rain-princess.ckpt
    

3. Avoid System Python Permission Restrictions #

• If you're using your system's default Python installation, it might have strict permissions that block file access. Try running the command in a virtual environment (virtualenv or conda):
  1. Activate your virtual environment first (e.g., source my_env/bin/activate for virtualenv on Linux/macOS, or conda activate my_env for Conda)
  2. Re-run the evaluate.py command inside the environment
• Only use sudo as a last resort (e.g., sudo python evaluate.py ...). Running with sudo gives the command admin privileges, which can cause unexpected issues with file ownership later, so only do this if you're certain the problem is system-level permissions.

4. Ensure Input File Isn't Locked #

• If your input image is open in another program (like Photoshop, Preview, or a photo viewer), close it first—many programs lock files while they're open, preventing other processes from accessing them and triggering permission errors.

Take it step by step, and you'll get past this error in no time!

内容的提问来源于stack exchange，提问作者Jxd