==============
switchcase

switchcase implements a simple Switch-Case construct in Pure Python.

Under the hood, the switch function works by simply returning a length-1
list containing a matching function. The entire implementation is 3 lines long:

.. code:: python

from operator import eq
def switch(value, comp=eq):
    return [lambda match: comp(match, value)]

Basic Usage

.. code-block:: python

>>> from switchcase import switch
>>> def func(x):
...     for case in switch(x):
...         if case(0):
...             print("x was 0")
...             break
...         if case(1):
...             print("x was 1")
...             break
...     else:
...         print("x was unmatched")
>>> func(0)
"x was 0"
>>> func(1)
"x was 1"
>>> func(2)
"x was unmatched"

Custom Comparisons

By default, switch uses operator.eq to compare the value passed to
switch and the values subsequently passed to case. You can override
this behavior by passing a comparator function to switch as a second
argument.

.. code-block:: python

import re
from switchcase import switch
def f(x):
... out = []
... for case in switch(x, comp=re.match):
... if case("foo_bar"):
... out.append(0)
... break
... if case("foo_."):
... out.append(1)
... if case("._bar"):
... out.append(2)
... return out
f("foo_bar")
[0]
f("foo_notbar")
[1]
f("notfoo_bar")
[2]
f("foo____bar")
[1, 2]