strongtyping-pyoverload
A Runtime method overload decorator which should behave like a compiled language
- there is a
overridedecorator fromtypingwhich works only for static type checking - this decorator works on
runtime
Install
pip install strongtyping-pyoverload
Examples
from typing import List
from strongtyping_pyoverload import overload
class Example:
@overload
def my_func(self):
"""
Base information about the func
"""
return 0
@overload
def my_func(self, a: int, b: int):
"""
Why this one
:param a:
:param b:
:return:
"""
return a * b
@overload
def my_func(self, a: int, b: int, c: int):
"""
What the hell
:param a:
:param b:
:param c:
:return:
"""
return a * b * c
@overload
def my_func(self, *, val: int, other_val: int):
"""
Now kwargs only
:param val:
:param other_val:
:return:
"""
return val, other_val
@overload
def my_func(self, val: List[int], other_val, /):
"""
Pos only
:param val:
:param other_val:
:return:
"""
return [other_val * v for v in val]
@overload
def my_func(self, val: List[str], other_val, /):
"""
Pos only but special for `string` elements
:param val:
:param other_val:
:return:
"""
return ''.join(val), other_val
if __name__ == "__main__":
example = Example()
assert example.my_func() == 0
assert example.my_func(2, 3, 4) == 24
assert example.my_func([1, 2, 3], 3) == [3, 6, 9]
assert example.my_func(2, "3") == "33"
assert example.my_func([1, 2, 3, 4], 10) == [10, 20, 30, 40]
assert example.my_func(["1", "2", "3", "4"], 2) == ('1234', 2)
help(example.my_func)
"""
Help on method my_func:
my_func(val: List[str], other_val, /) method of __main__.Example instance
Base information about the func
Why special
:param a:
:param b:
:return:
Why this one
:param a:
:param b:
:return:
What the hell
:param a:
:param b:
:param c:
:return:
Now kwargs only
:param val:
:param other_val:
:return:
Pos only
:param val:
:param other_val:
:return:
Pos only but special for `string` elements
:param val:
:param other_val:
:return:
"""
Do I need to add a type hint for each parameter??
- the is answer no you only need to have one typed parameter which differ
> > other.other_func(2, 2) 16 >> > other.other_func([1, 2, 3], 2) 6">
from strongtyping_pyoverload import overload class Other: @overload def other_func(self, a: int, b): return (a + b) * (a + b) @overload def other_func(self, a: str, b): return f'{a.lower()}_{b.lower()}' @overload def other_func(self, a: list, b): return len(a) * b >> > other = Other() >> > other.other_func("Hello", "World") hello_world >> > other.other_func(2, 2) 16 >> > other.other_func([1, 2, 3], 2) 6
- or have a different length for your parameters
from strongtyping_pyoverload import overload
class Other:
@overload
def other_func(self, a):
return a ** a + a
@overload
def other_func(self, a, b):
return (a * a) / b
@overload
def other_func(self, a, b, c):
return a + b + c
>> > other = Other()
>> > other.other_func(2)
6
>> > other.other_func(2, 3)
1.333333333333333
>> > other.other_func(2, 3, 4)
9
- subclasses can overwrite an existing function but these must match the exact type definition
from strongtyping_pyoverload import overload
class Example:
@overload
def other_func(self):
return 0
@overload
def other_func(self, a: int, b: int):
return (a * a) / b
class Other:
@overload
def other_func(self, a):
return a ** a + a
@overload
def other_func(self, a: int, b: int):
return ((a * a) / b) + a
>> > other = Other()
>> > other.other_func()
0
>> > other.other_func(2)
6
>> > other.other_func(2, 3)
3.333333333333333
Installation
- pip install strongtyping-pyoverload
Versioning
- For the versions available, see the tags on this repository.
Authors
- Felix Eisenmenger
License
- This project is licensed under the MIT License - see the LICENSE.md file for details
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