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Subprocess is somewhat baroque, but you could make a convenience function and put it in your init.sage file, e.g.:

import subprocess def make_it_so(acommand): ''' Uses subprocess module to return the output of a shell command ''' return subprocess.Popen(acommand,shell=True,stdout=subprocess.PIPE).communicate()[0]

and then sage: make_it_so('pwd') '/Users/mh\n'

Subprocess is somewhat baroque, but you could make a convenience function and put it in your init.sage file, e.g.:

import subprocess
def make_it_so(acommand):
    '''
    Uses subprocess module to return the output of a shell command
    '''
    return subprocess.Popen(acommand,shell=True,stdout=subprocess.PIPE).communicate()[0]
subprocess.Popen(acommand,shell=True,stdout=subprocess.PIPE).communicate()[0]

sage: make_it_so('pwd')
'/Users/mh\n'
'/Users/mh\n'