commands
The commands
module contains wrapper functions for os.popen()
which take a system command as a string and return any output generated by
the command, and optionally, the exit status.
The commands
module is only usable on systems which support
popen()
(currently Unix).
The commands
module defines the following functions:
os.popen()
and return
a 2-tuple (status, output). cmd is actually run as
{ cmd ; } 2>&1
, so that the returned output will contain output
or error messages. A trailing newline is stripped from the output.
The exit status for the command can be interpreted according to the
rules for the C function wait()
.
getstatusoutput()
, except the exit status is ignored and
the return value is a string containing the command's output.
getoutput()
function, and properly escapes
backslashes and dollar signs in the argument.
Example:
>>> import commands >>> commands.getstatusoutput('ls /bin/ls') (0, '/bin/ls') >>> commands.getstatusoutput('cat /bin/junk') (256, 'cat: /bin/junk: No such file or directory') >>> commands.getstatusoutput('/bin/junk') (256, 'sh: /bin/junk: not found') >>> commands.getoutput('ls /bin/ls') '/bin/ls' >>> commands.getstatus('/bin/ls') '-rwxr-xr-x 1 root 13352 Oct 14 1994 /bin/ls'