Using python how can I make this happen?
python_shell$> print myPhone.print_call_log() | grep 555
The only thing close that I've seen is using "ipython console", assigning output to a variable, and then using a .grep() function on that variable. This is not really what I'm after. I want pipes and grepping on anything in the output (including errors/info).
Python's interactive REPL doesn't have grep, nor process pipelines, since it's not a Unix shell. You need to work with Python objects.
So, assuming the return value of myPhone.print_call_log is a sequence:
call_log_entries = myPhone.print_call_log()
entries_containing_555 = [
entry for entry in call_log_entries
if "555" in entry]
'\n' separated string and can use split('\n') to convert it to a sequence.What about something like this.
import subprocess
results = subprocess.check_output('cat /path/to/call_log.txt | grep 555', shell=True)
print(results)
Or:
import subprocess
string = myPhone.print_call_log().replace("\'","\\'")
results = subprocess.check_output('echo \''+string+'\' | grep 555', shell=True)
print(results)
It is hard to tell without knowing what the return type of myPhone.print_call_log(). Is it a generator, or does it return a list? Or a string?
Related Questions:
Docs:
Based on comment by glglgl
Something like this might be more appropriate as written by glglgl:
results = subprocess.check_output('echo \''+myPhone.print_call_log()+'\' | grep 555', shell=True), a combination of stdin=stubprocess.PIPE and .communicate() would be more appropriate... but then, you can omit the subprocess altogether and perform the search on your own.' in your print_call_log() output? If you replace them by '\'', you should be fine. But "elegant" is not quite the right word for this...
reto do pattern match in python or write the log to a temp file to usegrep.