Python Forum

I'm writing a script to log disk usage on all our hosts to a central DB server. This works fine on one host, but on a different host I'm getting an error:

Output:
# python36
Python 3.6.8 (default, Apr 25 2019, 21:02:35)
[GCC 4.8.5 20150623 (Red Hat 4.8.5-36)] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import subprocess
>>> df = subprocess.run(['df','-m'], universal_newlines=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/local/lib/python3.6/site-packages/run/__init__.py", line 145, in __new__
    process = cls.create_process(command, stdin, cwd=cwd, env=env, shell=shell)
  File "/usr/local/lib/python3.6/site-packages/run/__init__.py", line 121, in create_process
    shlex.split(command),
  File "/usr/lib64/python3.6/shlex.py", line 305, in split
    return list(lex)
  File "/usr/lib64/python3.6/shlex.py", line 295, in __next__
    token = self.get_token()
  File "/usr/lib64/python3.6/shlex.py", line 105, in get_token
    raw = self.read_token()
  File "/usr/lib64/python3.6/shlex.py", line 136, in read_token
    nextchar = self.instream.read(1)
AttributeError: 'list' object has no attribute 'read'
>>>

Both hosts are running CentOS 7 and Python 3.6.8

---

Doing a little more investigation, I was able to replicate the problem on the first host by running pip3 install subprocess.run. I then ran pip3 uninstall subprocess.run on both hosts and was able to get things working again.

I was unaware that Python includes the subprocess.run module, but apparently the version installed with Pip is faulty? Can someone explain what happened here?

It seems that there is a package named subprocess.run in pypi. It's probably not what you want. From your error message this package doesn't support a list as the first argument of run().

(Sep-16-2019, 02:08 PM)swechsler Wrote: [ -> ]I was unaware that Python includes the subprocess.run module, but apparently the version installed with Pip is faulty? Can someone explain what happened here?

subprocess added the run() function in 3.5,not related to the 3-party PyPi module.

subprocess Wrote:The run() function was added in Python 3.5;