Thanks Grant. There are quite a few libraries that wrap system calls like this, and it works pretty well. I will note that it can be very slow on Windows. I’ll also mention that writing tests for this sort of thing is very helpful, since it involves documenting the output that you’re parsing (trying to follow the code otherwise is impossible without trial and error). Glad you found a solution (and I’d encourage you to write unit tests!).

Thanks for the help!

We ended up going for another route. Instead of trying to use the p4api, we went with calling p4 commands with a mix of os.system and subprocess.check_output/.Popen.

It’s not perfect, and needs more work. But we can successfully check files out and mark files for add automatically in the users perforce workspace.

There is a lot of ‘info gathering’ code used before this, but this is the meat and potatoes of what we made.

ChangelistNumberList = []
ChangelistInfo = []

os.system(‘p4 –field “Description=Change List Created by Publish Tool” –field “Files=” change -o | p4 change -i’)

p4ClientText = subprocess.check_output(‘p4 set P4CLIENT’)
split = p4ClientText.split(“=”, 1)
badClient = split[1]
split2 = badClient.split(” “, 1)
currentClient = split2[0]

ChangeText = subprocess.check_output(‘p4 changes -c’ + ‘ ‘ + currentClient + ‘ ‘ + ‘-m1’)
ChangelistInfo.append(ChangeText)
split = ChangelistInfo[0].split(” “)
ChangelistNumberStr = split[1]
ChangelistNumber = str(ChangelistNumberStr)
for file in filesToCheckOut:
os.system(‘p4 add -c’ + ‘ ‘ + ChangelistNumber + ‘ ‘ + file)
os.system(‘p4 edit -c’ + ‘ ‘ + ChangelistNumber + ‘ ‘ + file)

I hope this helps someone!

Hi Grant, it’s possible either 1) your version of Python 2.7 has a very old SSL that doesn’t have 1.0.1 support (very unlikely), or the Perforce server is not allowing 1.0.1 or other old version connections and the Python OpenSSL isn’t negotiating the right version.
This is pretty tricky- can you try connecting to the P4 server from a newer version of Python, outside of Maya? And then check that SSL library version, and see if there is a way to tell what cipher/version is being used.
(I am no expert in this but have had to debug similar issues, hopefully that is a bit of information to go on)
Let us know how it goes!

Hey Nicholas, I also need to get Perforce working with Maya 2020. Could you help me understand what to do with these files? I downloaded the p4 and p4api files from above and placed them in my Python27/Lib/sitepackages.

But now I’m getting a
‘[P4.connect()] Connect to server failed; check $P4PORT. SSL library must be at least version 1.0.1.’

At least I can connect now to the API now. Any ideas?

Thanks Andres!