[Python] PsExec works from PowerShell but not by Python

I know there is a package PyPsExec but I'm asking why this happens and how to solve it. The command psexec -s -i -d \\<PC-NAME> -u <UserName> -p <Password> <Command> works when typed manually at PowerShell, however with Python as:

from subprocess import Popen,PIPE
p = Popen("""psexec -s -i -d \\<PC-NAME> -u <UserName> -p <Password>
<Command>""", stdin=PIPE, stdout=PIPE, shell= True )
stdout, stderr = p.communicate()
print(stdout, stderr)


I get:

'psexec' is not recognized as an internal or external command,
operable program or batch file.
b'' None


Any idea why? PsExec is configured at variable path. I get the same error for PsKill.

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