subprocess.call
Jens Thoms Toerring
jt at toerring.de
Fri Apr 19 10:43:05 EDT 2013
Ombongi Moraa Fe <moraa.lovetakes2 at gmail.com> wrote:
> [-- text/plain, encoding 7bit, charset: ISO-8859-1, 19 lines --]
> In my python script, I have this:
> command="lynx -dump
> 'phpscript?param1=%s¶m2=%s¶m3=%s¶m4=%s¶m5=%s'"%(value1,value2,value3,value4)
> result=subprocess.call(command,shell=True)
> print 'xml message'
> However, the response from running the php script is also printed on output
> screen. I don't want this output.
> How can i ensure that only the last print 'xml response' is returned?
You mean is printed out? Use subprocess.Popen() and redirect
stdout to a pipe, similar to this:
p = subprocess.Popen(command, stdout=subprocess.PIPE)
r = p.communicate()
print r[0] # This is the output (to stdout)
The return value of the Popen objects communicate() method is
a tuple with two elements, first contains what got written to
stdout (if redirected to a pipe, otherwise Nome), the second
what went to stderr (again if redirected to a pipe). If you
also redirect stdin then you can pass what you want to send
to the process spawned via Popen() as an argument to commu-
nicate().
BTW, according to the dicumentation you should split the
command line into its componenents and pass that as a list
to the call() or Popen() subprocess methods, so it would
seem to reasonable to use e.g.
command = [ 'lynx', '-dump',
( "'phpscript?param1={0}¶m2={1}¶m3={2}"
"¶m4={3}¶m5={4}'" )
.format( value1, value2, value3, value4, value5 ) ]
Note that there was one value for creating the string to be
passed to lynx was mising.
Regards, Jens
--
\ Jens Thoms Toerring ___ jt at toerring.de
\__________________________ http://toerring.de
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