[Python-Dev] Proposed addition to threading module - released

["Martin v. Löwis"]

Tim Peters wrote:
> Does
> 
>     with cv:
> 
> work to replace the outer (== only) acquire/try/finally/release dance?

Indeed it does - although implemented in a somewhat convoluted way:
A lock *is* a context (or is that "context manager"), i.e. it implements

  def __context__(self): return self
  __enter__=acquire
  def __exit__(self,*args): return self.release() #roughly

A _Condition *has* a lock, so it could become the context (manager?)
through

  def __context__(self): return self.lock

However, instead of doing that, it does

  def __context__(self): return self
  # roughly: __enter__ is actually set in __init__ to self.lock.acquire
  def __enter__(self):
      return self.acquire()
  def __exit__(self):
      return self.release

Looks somewhat redundant to me, but correct.

Regards,
Martin