使用pyrouge计算生成式摘要Rouge分数时遇WinError 2错误求助

That WinError 2 almost always boils down to pyrouge being unable to locate the underlying ROUGE Perl tools or the Perl runtime itself—remember, pyrouge is just a Python wrapper for the actual ROUGE-1.5.5.pl script written in Perl. Let's walk through the troubleshooting steps one by one:

1. Verify Your Perl Installation & PATH Setup #

ROUGE relies entirely on Perl to run, so first make sure this is sorted:

• If you haven't already, install Strawberry Perl (the most reliable Perl distribution for Windows). During installation, don't forget to check the box that says "Add Perl to system PATH".
• Open a Command Prompt (cmd) and run perl -v. If you see the Perl version info pop up, you're good here. If you get a "command not found" error, manually add the Perl bin directory (usually C:\Strawberry\perl\bin) to your system's PATH environment variable.

2. Double-Check ROUGE Path Configuration #

pyrouge needs explicit instructions on where your ROUGE-1.5.5 tools are stored. Here's how to set it correctly:

• First, confirm you've downloaded and extracted the full ROUGE-1.5.5 package (not just the pyrouge Python library) to a path like C:\ROUGE-1.5.5.
• In your Python code, explicitly set the ROUGE path before running any calculations:

  from pyrouge import Rouge155
  rouge = Rouge155()
  rouge.set_rouge_path('C:\\ROUGE-1.5.5')  # Use double backslashes for Windows paths
  # Rest of your code (setting system/reference directories, etc.)
  

• Alternatively, set a global path once so you don't have to repeat it: Open a Python shell and run:

  import pyrouge
  pyrouge.set_rouge_path('C:\\ROUGE-1.5.5')
  

3. Ensure Your ROUGE Package Is Complete #

Sometimes incomplete ROUGE downloads cause missing files. Check these critical components:

• In your ROUGE directory, confirm ROUGE-1.5.5.pl exists in the root folder.
• Check the data subfolder for files like WordNet-2.0.exc.db—if these are missing, re-download the full ROUGE-1.5.5 package.
• Test the Perl script directly: Open cmd, navigate to your ROUGE directory, and run perl ROUGE-1.5.5.pl. If you get a usage guide instead of a "file not found" error, the script itself is intact.

4. Audit Your Summary File Paths #

Even if your XMLs look correct, path issues can still trip things up:

• Use absolute paths for your system and reference summary directories (avoid relative paths if possible). For example:

  rouge.system_dir = 'C:\\my_project\\generated_summaries'
  rouge.model_dir = 'C:\\my_project\\reference_summaries'
  

• Avoid spaces, Chinese characters, or special symbols in your paths—Windows can be finicky about these.

5. Rule Out Permission Issues #

Windows permissions can block execution of Perl scripts:

• Try running your Command Prompt or Python IDE as Administrator and re-run the code.
• Move your ROUGE package and project files out of protected folders like C:\Program Files—use a regular user folder like C:\Users\YourName\Projects instead.

If none of these work, add a debug line to print the exact command pyrouge is trying to run:

print(rouge._get_rouge_cmd())

Copy that command into cmd and run it manually—this will show you exactly which file the system can't find, making the problem trivial to fix.

内容的提问来源于stack exchange，提问作者kiwi huang