Playing with Python `with` statement

with_ex.py

# $ python -i withtest.py
# initializing <__main__.cex instance at 0x10f219e18> () {}
# entering <__main__.cex instance at 0x10f219e18> () {}
# with <__main__.cex instance at 0x10f219e18>
# exiting <__main__.cex instance at 0x10f219e18> (None, None, None) {}
class cex:
  def __enter__(slf, *a, **k):
    print 'entering', slf, a, k
    return slf
  def __exit__(slf, *a, **k):
    print 'exiting', slf, a, k
  def __init__(slf, *a, **k):
    print 'initializing', slf, a, k

with cex() as xec:
  print 'with', xec