Connecting to SSH using Python

I am trying to use Spur to connect to remote server via SSH. It works well when I give 'ps' and 'aux' argument, it works fine. When I give 'ps', 'aux', '|', 'grep' and 'java' it gives me an error

spur.results.RunProcessError: return code: 1
output: b''
stderr output: b'ERROR: Garbage option.n********* simple selection *********  ********* selection by list *********n-A all processes                      -C by command namen-N negate selection                   -G by real group ID (supports names)n-a all w/ tty except session leaders  -U by real user ID (supports names)n-d all except session leaders         -g by session OR by effective group namen-e all processes                      -p by process IDnT  all processes on this terminal     -s processes in the sessions givenna  all w/ tty, including other users  -t by ttyng  OBSOLETE -- DO NOT USE             -u by effective user ID (supports names)nr  only running processes             U  processes for specified usersnx  processes w/o controlling ttys     t  by ttyn*********** output format **********  *********** long options ***********n-o,o user-defined  -f full            --Group --User --pid --cols --ppidn-j,j job control   s  signal          --group --user --sid --rows --infon-O,O preloaded -o  v  virtual memory  --cumulative --format --deselectn-l,l long          u  user-oriented   --sort --tty --forest --versionn-F   extra full    X  registers       --heading --no-heading --contextn                    ********* misc options *********n-V,V  show version      L  list format codes  f  ASCII art forestn-m,m,-L,-T,H  threads   S  children in sum    -y change -l formatn-M,Z  security data     c  true command name  -c scheduling classn-w,w  wide output       n  numeric WCHAN,UID  -H process hierarchyn'

My code is as following :

import spur

shell = spur.SshShell(hostname='hostname',
                      username='uname',
                      password='password')

with shell:
    result = shell.run(['ps', 'aux', '| grep java'])
print result.output

Please help me if anyone has faced similar issue