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So im trying to save the output from my subprocess.call but I keep getting the following error:
AttributeError: 'int' object has no attribute 'communicate'
Code is as follows:
p2 = subprocess.call(['./test.out', 'new_file.mfj', 'delete1.out'], stdout = PIPE)
output = p2.communicate[0]
428
To capture the output of the subprocess. run method, use an additional argument named “capture_output=True”. You can individually access stdout and stderr values by using “output. stdout” and “output.
The subprocess. check_output() is used to get the output of the calling program in python. It has 5 arguments; args, stdin, stderr, shell, universal_newlines. The args argument holds the commands that are to be passed as a string.
subprocess. check_output() is the one that runs the command and returns the return value. If you want the output write your value to STDOUT and use check_output() to get the value.
stdout=PIPE means that subprocess' stdout is redirected to a pipe that you should read e.g., using process.communicate() to read all at once or using process.stdout object to read via a file/iterator interfaces.
You're looking for subprocess.Popen() instead of call().
You also need to change it to p2.communicate()[0].
87
That's because subprocess.call returns an int:
subprocess.call(args, *, stdin=None, stdout=None, stderr=None, shell=False)
Run the command described by args. Wait for command to complete, then return the returncode attribute.
It looks like you want subprocess.Popen().
Here's a typical piece of code I have to do this:
p = Popen(cmd, stdout=PIPE, stderr=PIPE, bufsize=256*1024*1024)
output, errors = p.communicate()
if p.returncode:
raise Exception(errors)
else:
# Print stdout from cmd call
print output
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