legacy-cgi dependency required in python>=3.13

[mo-jfallon]

What maintenance does this project need?

Issue:

An error was encountered running the cdsapi test code: https://cds.climate.copernicus.eu/how-to-api

(cdsapi) ᚌ username@hostname: Downloads $ python cdsapi_test.py 
Traceback (most recent call last):
  File "~/Downloads/cdsapi_test.py", line 3, in <module>
    client = cdsapi.Client()
  File "~/.conda/envs/cdsapi/lib/python3.13/site-packages/cdsapi/api.py", line 285, in __new__
    import cads_api_client.legacy_api_client
  File "~/.conda/envs/cdsapi/lib/python3.13/site-packages/cads_api_client/__init__.py", line 25, in <module>
    from .api_client import ApiClient
  File "~/.conda/envs/cdsapi/lib/python3.13/site-packages/cads_api_client/api_client.py", line 8, in <module>
    import multiurl.base
  File "~/.conda/envs/cdsapi/lib/python3.13/site-packages/multiurl/__init__.py", line 11, in <module>
    from .downloader import Downloader, download, robust
  File "~/.conda/envs/cdsapi/lib/python3.13/site-packages/multiurl/downloader.py", line 18, in <module>
    from .http import FullHTTPDownloader, PartHTTPDownloader, robust
  File "~/.conda/envs/cdsapi/lib/python3.13/site-packages/multiurl/http.py", line 10, in <module>
    import cgi
ModuleNotFoundError: No module named 'cgi'

cgi module removed from Python versions >= 3.13 (see documentation: https://docs.python.org/3.11/library/cgi.html )

Solution:

Install legacy-cgi (https://pypi.org/project/legacy-cgi). This resolved the error for me, and I was able to download data. Perhaps this should be treated as a new required dependency going forwards)?

(On a separate note, I also encountered an issue with now deprecated pkg_resource, and this is resolved in the suggested pull request #74. Mentioning here as both issues occur because of upgrade to python 3.13.)

Organisation

Met Office

[akrherz]

c/f ecmwf/multiurl#14

[veenstrajelmer]

@mo-jfallon this should indeed be resolved with the PR linked to ecmwf/multiurl#14. The latest release of multiurl should therefore support python 3.13. Does this indeed resolve your issue? In that case this issue can be closed.

[mo-jfallon]

Yes thanks @veenstrajelmer , I will mark this issue as closed.