Better way to execute ruby file using Python and How to get ruby console output when ruby file is run from python?

Question

I am building a standalone using python. This standaloone should execute a ruby file.

I have read this article - http://www.decalage.info/python/ruby_bridge I have used os.system() which works well. But I have an issue here. If a ruby file has some error, file simply terminates without error. Can you please let me know how to GET ruby console output so that I can display the same in my standalone.

ghostdog74 · Accepted Answer · 2010-10-04 23:30:30Z

5

you can use subprocess module

cmd="ruby myrubyscript.rb"                                                                          
p=subprocess.Popen(cmd, shell=True, stdout=subprocess.PIPE)                              
output, errors = p.communicate()

then use the output variable

Just a note, your Python program will be dependent on whether you have Ruby installed or not. If possible, try to do everything in Python.

answered Oct 4, 2010 at 23:30

ghostdog74

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4 Comments

abhishek Over a year ago

Hi user131527,Thanks for the reply. But there seems to be a problem.Output is not getting printed. For e.g. we take a ruby file which has print "Hello world". now i use the code above and print Output. Output is not displayed. Same thing for errors - I mean consider ruby file with syntax error and try to print errors.

ghostdog74 Over a year ago

make sure import subprocess module. make sure your Ruby script actually prints out something.

abhishek Over a year ago

i had imported subprocess module and ruby file is working. If i print output -> Blank is displayed and if i print errors -> None is Displayed

abhishek Over a year ago

It Worked.. I just need to add stdout and stderr as PIPE.

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