Pampy: The Pattern Matching for Python you always dreamed of.
Fixed Python3 dataclass behaviour, added default
parameter to match
function.
Pampy supports Python 3.7 dataclasses. You can pass the operator _
as arguments and it will match those fields.
@dataclass
class Pet:
name: str
age: int
pet = Pet('rover', 7)
match(pet, Pet('rover', _), lambda age: age) # => 7
match(pet, Pet(_, 7), lambda name: name) # => 'rover'
match(pet, Pet(_, _), lambda name, age: (name, age)) # => ('rover', 7)
Fixed match_value() with == instead of "is"