Human: How can I execute shell command with a | pipe in it Assistant: 
Here is some code to execute shell command 'grep -r PASSED *.log | sort -u | wc -l' with a | pipe in it

subprocess.call('grep -r PASSED *.log | sort -u | wc -l', shell=True)

#Warning: this code generation is experimental. Please inspect the code for any bugs before executing.