The simplest, most dangerous solution would be to monkey patch stdin and stdout:
import gevent.monkey
gevent.monkey.patch_all(sys=True)
def my_app():
# ... some code here
import pdb
pdb.set_trace()
# ... some more code here
my_app()
This is quite dangerous since you risk stdin/stdout behaving in a strange way
during the rest of your app lifetime.
Instead you can use a library that I wrote: gtools.pdb. It minimizes
the risk to the pdb prompt only:
def my_app():
# ... some code here
import gtools.pdb
gtools.pdb.set_trace()
# ... some more code here
my_app()
Basically, what it does is tell pdb to use a non-blocking stdin and stdout for
its interactive prompt. Any running greenlets will still continue to run
in the background.
If you want to avoid the dependency, all you need to do is tell pdb to use
a gevent friendly stdin and stdout with something like this:
import sys
from gevent.fileobject import FileObjectThread as File
def Pdb():
import pdb
return pdb.Pdb(stdin=File(sys.stdin), stdout=File(sys.stdout))
def my_app():
# ... some code here
Pdb().set_trace()
# ... some more code here
my_app()
Note that with any of these solutions, you loose Key-up, Key-down pdb prompt facilites see gevent issue patching stdin/stdout.
