Switch-Case in pure Python
Project description
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:
from operator import eq
def switch(value, comp=eq):
return [lambda match: comp(match, value)]
Basic Usage
>>> 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.
>>> 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]
Project details
Release history Release notifications | RSS feed
Download files
Download the file for your platform. If you're not sure which to choose, learn more about installing packages.
Source Distribution
switchcase-1.0.tar.gz
(2.2 kB
view details)
File details
Details for the file switchcase-1.0.tar.gz
.
File metadata
- Download URL: switchcase-1.0.tar.gz
- Upload date:
- Size: 2.2 kB
- Tags: Source
- Uploaded using Trusted Publishing? No
File hashes
Algorithm | Hash digest | |
---|---|---|
SHA256 | 4170300a2e69611cff996e508fb3a2d3caff257f44f70c987dbfe3500b722e72 |
|
MD5 | 0e1424a4a4d7f5c79c1694c5ce200c22 |
|
BLAKE2b-256 | 010844a3d89b53d8d43266126584821bc08e0b3d0e95a2025fed3ec3bd7ab5b1 |