Receiving data from commandPort

[unnikris...@gmail.com]

Hi,

I'm sending a command through the commandPort (from a C# server) and it executes a bunch of other python commands in Maya. I get the response in my Maya console but none of this is being passed onto the C# server through the commandPort. The C# server prints 'None' (breakpoints) the same moment my Maya console is populated by the logs from the python code.

This is what opens the commandPort:

cmds.commandPort(name="localhost:8010", bufferSize=4096, sourceType="python", noreturn=False)

On the C# side, I have a NetworkStream.Read() that's fetching the data.

TIA

[Justin Israel]

There is a difference between the logging I/O output and the return value of the function.  When I write a function like this:

def add(x, y):

    z = x + y

    print "OUTPUT:", z

    return z

I set the OUTPUT go to the Maya script editor, and the value 3 is returned in the commandPort stream. But one thing to be aware of is that if your command has multiple statements separated with a semicolon, then None will be returned:

$  echo '1+1 ; 2+2' | nc localhost 8010

None

$  echo '2+2' | nc localhost 8010

4

So if you need to send a bunch of logic, you might need to wrap it into a function and then have it return your output.

TIA

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[unnikris...@gmail.com]

I'm doing something similar to what you said. I tried with the '|' operator but I was getting syntax errors returning through the commandPort. The below command is what I'm sending through the commandPort:

import maya.cmds ;
import os ;
proj_root = os.environ['PROJ_ENV'] ;
import sys ;
sys.path.append(proj_root + '\\plugins\\python\\maya') ;
import pluginTest ;
import imp ;
imp.reload(pluginTest) ;
pluginTest.SaveTest.save_file() ;

I'm only calling this function and its supposed to return the value once it's done. But I keep getting None as the response.

[Justin Israel]

That isn't a function though. Its 9 different statements. The limitation of the commandPort is that it will only return a value if its a single statement. The problem though is that even if you wrap this into a "def do()" function, you still need more than one statement to call it, which means no return value. 

I just avoided this whole situation and used a custom socket for return output. 

 

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