gv = 1 def f(): lv = 1 import pdb; pdb.set_trace() if __name__ == '__main__': f() --Return-- > /home/dsalvetti/test.py(5)f()->None -> import pdb; pdb.set_trace() (Pdb) list 1 gv = 1 2 3 def f(): 4 lv = 1 5 -> import pdb; pdb.set_trace() 6 7 if __name__ == '__main__': 8 f() [EOF] (Pdb) print gv 1 (Pdb) !gv = 2 (Pdb) print gv 2 (Pdb) print lv 1 (Pdb) !lv = 2 (Pdb) print lv 1