perhaps using shell=True
push = subprocess.Popen(s, shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
Instead of doing
s.split()
try using shlex from the standard library
import shlexshlex.split(s)
Shlex allows you configure the escaping behavior (see the link for details, the defaults might be sufficient though)
Specifically where you are going wrong is splitting at:
\"Another, App\"}"
.split()#
is using space-character by default you'll need to change split behaviour as others have said.