unable to run unix command using spur

[purnima1]

Hi Experts ,
I am trying to run simple command but getting an error

import spur
import spur.ssh

try:
	shell = spur.SshShell(hostname="EDQDVTAPP01.XXXXXX.com",port=22,username="applogs",password="XXXXXX",missing_host_key=spur.ssh.MissingHostKey.accept)
	with shell:
		result = shell.run("ls")
		print (result)
except spur.ssh.ConnectionError as error:
	print (error.original_traceback)
	raise

Error:
Traceback (most recent call last):
  File "unix_server_test.py", line 25, in <module>
    result = shell.run("ls")
  File "C:\Users\pubhatia\AppData\Local\Programs\Python\Python36\lib\site-packages\spur\ssh.py", line 166, in run
    return self.spawn(*args, **kwargs).wait_for_result()
  File "C:\Users\pubhatia\AppData\Local\Programs\Python\Python36\lib\site-packages\spur\ssh.py", line 206, in spawn
    raise NoSuchCommandError(command[0])
spur.errors.NoSuchCommandError: Command not found: l. Check that l is installed and on $PATH