Forking 0.1

A context manager to fork.

Forking

Forking is a Python context manager that run the code in a different process.

That means funny business:

>>> import os
>>> from forking import Forking
>>>
>>>
>>> with Forking():
...     os._exit(0)
>>> print("I will survive!")
I will survive!
>>>

Obviously side effects are only executed in the child process so not visible to the parent:

>>> i = 1
>>> with Forking():
...     i += 1
>>> print(i)
1
>>>

You can capture stdout and stderr though:

child = Forking()
with child:
    print("Youpi")
print(child.stdout)

Note that we can't do with Forking() as child because the as child part is not executed (as considered inside the with body).

You can also get info about the exit status of your process though child.exit which contains code, signal and has_core_dump:

>>> child = Forking()
>>> with child:
...     os._exit(12)
>>> print(child.exit.code)
12
>>>

Last trick, a Forking context can be reused (but its process will not):

>>> child = Forking()
>>> with child:
...     os._exit(21)
>>> print(child.exit.code)
21
>>> with child:
...     os._exit(22)
>>> print(child.exit.code)
22
>>>