3.8. Match Mapping¶
A mapping pattern looks like {"user": u, "emails": [*es]}. It
matches mappings with at least the set of provided keys, and if all the
sub-patterns match their corresponding values. It binds whatever the
sub-patterns bind while matching with the values corresponding to the
keys. Adding **rest at the end of the pattern to capture extra items
is allowed.
SetUp:
>>> def login_user(firstname, lastname): ...
>>> def login_admin(firstname, lastname): ...
Usage:
>>> user = {'role': 'admin', 'firstname': 'Mark', 'lastname': 'Watney'}
>>>
>>> match user:
... case {'role': 'admin', 'firstname': firstname, 'lastname': lastname}:
... login_admin(firstname, lastname)
...
... case {'role': 'user', 'firstname': firstname, 'lastname': lastname}:
... login_user(firstname, lastname)
3.8.1. Args, Kwargs¶
>>> user = {'role': 'admin', 'firstname': 'Mark', 'lastname': 'Watney'}
>>>
>>> match user:
... case {'role': 'admin', **data}: login_admin(**data)
... case {'role': 'user', **data}: login_user(**data)