Debugger in Python 3

[Sajal Gupta]

Hello,

I am trying to use debugger in python 3 in localhost - using dev_appserver. While I find documentation for python debugger usage in python 2.7 documentation, there is no similar section for python 3.

See the url below for python 2: https://cloud.google.com/appengine/docs/standard/python/tools/using-local-server#debugging_with_pdb

But corresponding section for python 3 is missing: https://cloud.google.com/appengine/docs/standard/python3/tools/using-local-server

IDE's own debugger doesn't seem to work - I am using pycharm. Trying to use it gives the following error:

===========

/usr/bin/python2.7 "/Applications/PyCharm CE.app/Contents/plugins/python-ce/helpers/pydev/pydevd.py" --multiproc --qt-support=auto --client 127.0.0.1 --port 57002 --file /Users/sajal/google-cloud-sdk/bin/dev_appserver.py --runtime_python_path=/usr/bin/python3 --support_datastore_emulator=yes 

Connected to pydev debugger (build 213.6461.77)
ERROR: (dev_appserver) python2: command not found

Process finished with exit code 1

============

Could you please advise.

Thank you.

Sajal

[wesley chun]

Hi, there are several issues at play here:

1. missing pdb section in the 3.x docs: this section may be missing possibly because it doesn't work in Python 3 or hasn't been tested or validated. The best thing to do here is to go to the Python 3 page you linked to, scroll down to the bottom, and click the blue "Send feedback" button, then specify the Python 2 page PDB section link like you did in your email and ask why this section is missing from *this* (Python 3) page.

2. dev_appserver.py running on Python 3 still requires the presence of a 2.7 interpreter: Look specifically at the blue sidebar on this page: https://cloud.google.com/appengine/docs/standard/python3/tools/using-local-server#running_the_local_development_server  which tells you how to specify the location of your Python 3 interpreter. While there is an internal bug created against removing final 2.x dependencies (for a purely 3.x version), I don't see an equivalent external bug for an App Engine dev_appserver issue yet, so if you want there to be a public record tracking this work, please file a new bug in that same component.

Depending on how you feel, you can take either (or both) of the above actions.

Best regards,

--Wesley

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
"A computer never does what you want... only what you tell it."
    wesley chun :: @wescpy :: Software Architect & Engineer
    Developer Advocate at Google by day; at night: Core Python

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[Sajal Gupta]

Thank you. I have done both.

Regards