Hi all, I have a problem using wget and Popen. I hope someone can help.
-- Problem -- I want to use the command: wget -nv -O "dir/cpan.txt" "http://search.cpan.org"; and capture all it's stdout+stderr. (Note that option -O requires 'dir' to be existing before wget is executed) Popen doesn't work, while os.system and shell do. Popen will give the error: dir/cpan.txt: No such file or directory While os.system and shell will give the correct result: 06:52:40 URL:http://search.cpan.org/ [3657/3657] -> "dir1/cpan.txt" [1] -- Background info about wget -- -Option -nv: -nv, --no-verbose turn off verboseness, without being quiet. -Option -O: -O, --output-document=FILE write documents to FILE. Note that wget requires any directories in the file-path of option -O to be existing before the wget command is executed. -- Python Code using Popen with cmd arg list -- # imports import os from subprocess import Popen, PIPE # vars and create dir cmd_set = ['wget', '-nv', '-O dir/cpan.txt', 'http://search.span.org'] cmd = ' '.join(cmd_set) print "cmd: " + cmd try: os.makedirs('dir') except: print 'dir already exists' # execute using Popen (does NOT work) proc = Popen(cmd_set, stdout=PIPE, stderr=PIPE) return_code = proc.wait() if return_code == 0: print "Success:\n%s" % (proc.stdout.read() + proc.stderr.read()) else: print "Failure %s:\n%s" % (return_code, proc.stderr.read() + proc.stdout.read()) # execute using os.system (does work) os.system(cmd) -- Python code output of Popen -- Failure 1: dir/cpan.txt: No such file or directory -- Question -- Why is Popen unable to correctly execute the wget, while os.system can? -- http://mail.python.org/mailman/listinfo/python-list
