Popen from subprocess couldn't find 'play' or 'aplay'.
My OS is Mac10.13.6, when I called Popen from subprocess.py and executed the flowing code
import platform
from subprocess import Popen
player = 'play' if platform.system() == 'Darwin' else 'aplay'
Popen([player, '-q', filename])
I received the following errors
File "/Users/lyuzhiliang/mycroft-precise/precise/util.py", line 78, in play_audio
Popen([player, '-q', filename])
File "/Users/lyuzhiliang/anaconda3/lib/python3.6/subprocess.py", line 709, in __init__
restore_signals, start_new_session)
File "/Users/lyuzhiliang/anaconda3/lib/python3.6/subprocess.py", line 1344, in _execute_child
raise child_exception_type(errno_num, err_msg, err_filename)
FileNotFoundError: [Errno 2] No such file or directory: 'play': 'play'
Do I need to install some dependencies?
I am not entirely sure, I think it has to be afplay. Maybe try to give the full path and look for the binary yourself. (I think /usr/bin/afplay)
Related
code example:
import subprocess
cmd_list = ["ls -la", "touch a.txt", "hostname"]
for _,i in enumerate(cmd_list):
x = subprocess.run(i)
print(x)
print(x.args)
print(x.returncode)
print(x.stdout)
print(x.stderr)
hostname works as expected but ls -la not
expected output:
output of ls -la, touch and hostname
error hitted:
File "linux_cmd.py", line 8, in <module>
x = subprocess.run(i)
File "/usr/lib64/python3.6/subprocess.py", line 423, in run
with Popen(*popenargs, **kwargs) as process:
File "/usr/lib64/python3.6/subprocess.py", line 729, in __init__
restore_signals, start_new_session)
File "/usr/lib64/python3.6/subprocess.py", line 1364, in _execute_child
raise child_exception_type(errno_num, err_msg, err_filename)
FileNotFoundError: [Errno 2] No such file or directory: 'ls -la': 'ls -la'```
subprocess.run() expects the arguments as a list when you give more than one argument.
Change you cmd_list to a list of lists when you want to give multiple arguments:
cmd_list = [["ls", "-la"], ["touch", "a.txt"], "hostname"]
https://docs.python.org/3/library/subprocess.html#subprocess.run
I'm trying to run this code:
import subprocess
def install_curl():
result = subprocess.check_output(['command', '-v', 'dnf']) #
if not result:
print("You should Install curl")
else:
result = subprocess.check_output(['command', '-v', 'apt'])
print(result)
install_curl()
Then I'm getting this error:
Traceback (most recent call last):
File "/home/pbravodez1/projects/Automate_task/test_gpg.py", line 98, in <module>
install_curl()
File "/home/pbravodez1/projects/Automate_task/test_gpg.py", line 91, in install_curl
result = subprocess.check_output(['command', '-v', 'dnf']) #
File "/usr/lib/python3.8/subprocess.py", line 411, in check_output
return run(*popenargs, stdout=PIPE, timeout=timeout, check=True,
File "/usr/lib/python3.8/subprocess.py", line 489, in run
with Popen(*popenargs, **kwargs) as process:
File "/usr/lib/python3.8/subprocess.py", line 854, in __init__
self._execute_child(args, executable, preexec_fn, close_fds,
File "/usr/lib/python3.8/subprocess.py", line 1702, in _execute_child
raise child_exception_type(errno_num, err_msg, err_filename)
FileNotFoundError: [Errno 2] No such file or directory: 'command'
Do you have any idea on how to run this "command" in order to check which package manager is installed in the Operating System?
The following piece of code was working fine for a year, of late it intermittently started failing with following error, wonder if any OS or hardware change is causing this
import subprocess
def bash_command(cmd):
process = subprocess.Popen(cmd, shell=True, executable="/bin/bash")
process.wait()
bash_command("bash myscript.sh")
The error message is:
Traceback (most recent call last): File
"/Users/ishandutta2007/Documents/Projects/p2/shell_way/all_in_one_refill.py",
line 68,
bash myscript.sh File "/Users/ishandutta2007/Documents/Projects/p2/shell_way/all_in_one_refill.py",
line 31, in bash_command
process = subprocess.Popen(cmd, shell=True, executable="/bin/bash") File
"/Users/ishandutta2007/.pyenv/versions/3.6.0/lib/python3.6/subprocess.py",
line 707, in __init__
restore_signals, start_new_session) File "/Users/ishandutta2007/.pyenv/versions/3.6.0/lib/python3.6/subprocess.py",
line 1326, in _execute_child
raise child_exception_type(errno_num, err_msg) OSError: [Errno 9] Bad file descriptor
I cannot use parameters when invoking date command inside Popen.
I am using Ubuntu 18.04.2 LTS, Python 3.6.7. I am trying to just print date by invokin date command from shell, unfortunately I got errors which says
Traceback (most recent call last):
File "./123.py", line 15, in <module>
print_date()
File "./123.py", line 9, in print_date
MyOut = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
File "/usr/lib/python3.6/subprocess.py", line 709, in __init__
restore_signals, start_new_session)
File "/usr/lib/python3.6/subprocess.py", line 1344, in _execute_child
raise child_exception_type(errno_num, err_msg, err_filename)
FileNotFoundError: [Errno 2] No such file or directory: "date '+%S'": "date '+%S'"
Code:
#!/usr/bin/python3
import subprocess
import time
import os
cmd = "date '+%S'"
def print_date():
MyOut = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
stdout,stderr = MyOut.communicate()
print(stdout)
print(stderr)
os.system(cmd)
print_date()
Could anyone explain what went wrong, and why Python tries to find file "date '+%S'" ?
It works when we change cmd to cmd = "date", so what is correct way of passing '+%S' ?
The normal way to pass a command to Popen() is with a list. Try this:
cmd = ["date" '+%S']
completeProcess = subprocess.run("la")
This is my code to run commands via python, and it raise this error:
Traceback (most recent call last):
File "script_senior.py", line 171, in <module>
completeProcess = subprocess.run("la") # doesn't capture output
File "/usr/lib/python3.5/subprocess.py", line 693, in run
with Popen(*popenargs, **kwargs) as process:
File "/usr/lib/python3.5/subprocess.py", line 947, in __init__
restore_signals, start_new_session)
File "/usr/lib/python3.5/subprocess.py", line 1551, in _execute_child
raise child_exception_type(errno_num, err_msg)
FileNotFoundError: [Errno 2] No such file or directory: 'la'
My OS is ubuntu, and when enter "la" in terminal, it will list files(include hidden files) in current working directory. and "ll" cmd will list file details. but I can't use them in python's subprocess api
How can I achieve this function? Is there any common api to run commands or just the python didn't recognize "la"
la is an alias for 'ls -A'. That comes as a default shell alias in systems like Ubuntu. If you wanna run it just use:
completeProcess = subprocess.run(["ls","-A"])
and if you are looking for the stdout you can use something like:
completeProcess = subprocess.run(["ls","-A"] , stdout=subprocess.PIPE)
print(completeProcess.stdout.decode())