-
Notifications
You must be signed in to change notification settings - Fork 36
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
Merge branch 'mr/qualifier_operators' into 'master'
Add support for new operators &, + and - on spec arguments See merge request it/e3-core!34
- Loading branch information
Showing
3 changed files
with
68 additions
and
1 deletion.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,39 @@ | ||
from __future__ import annotations | ||
from typing import TYPE_CHECKING | ||
|
||
if TYPE_CHECKING: | ||
from typing import Iterable | ||
|
||
|
||
class Qualifier(dict): | ||
|
||
def __sub__(self, other: Iterable[str]) -> Qualifier: | ||
"""Create a new dict qualifier with some keys filtered-out. | ||
Examples: | ||
{"k1": "v1", "k2": "v2"} - {"k2"} == {"k1": "v1"} | ||
{"k1": "v1", "k2": "v2"} - {"k2": "v3"} == {"k1": "v1"} | ||
""" | ||
return Qualifier({k: v for k, v in self.items() if k not in other}) | ||
|
||
def __add__(self, other: dict | None) -> Qualifier: | ||
"""Create a new dict qualifier that merges two dicts. | ||
The operation is equivalent to pipe operator with the difference that | ||
its priority is higher as defined by Python standard. This allows more | ||
natural expression that mix + and - operators (both operators have the | ||
same priority). | ||
""" | ||
if other is None: | ||
return Qualifier(self) | ||
else: | ||
return Qualifier(self | other) | ||
|
||
def __and__(self, other: Iterable[str]) -> Qualifier: | ||
"""Create a new dict qualifier with the subset other of the keys. | ||
Examples: | ||
{"k1": "v1", "k2": "v2"} & {"k2"} == {"k2": "v2"} | ||
{"k1": "v1", "k2": "v2"} & {"k2": "v3"} == {"k2": "v2"} | ||
""" | ||
return Qualifier({k: v for k, v in self.items() if k in other}) |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters