import pdb
def foo(): pass
class Command:
  def __init__(self,c): self.cmds=c+['']
  def readline(self): return self.cmds.pop(0)

p=pdb.Pdb()
p.use_rawinput = False
p.stdin=Command(['break readline\n', 'break foo\n', 'list 1,10\n', 'continue\n'])
p.set_trace()