add not_lesser_than(), WebColor(), annotations and documentation changes

CHANGELOG.md

@@ -4,11 +4,11 @@
 
 + Add RNG/random selection overloads such as `luck()`, `rng_overload()`
 + Add 7 new throwable exceptions
-+ Add color utilities: `chalk` module
++ Add color utilities: `chalk` object and `WebColor()`
 + Add `.terminal` module, to ease TUI development
 + `calendar`: add `parse_time()`
-+ Add validator `not_greater_than()`
-+ Add `@future()` decorator
++ Add validators `not_greater_than()`, `not_less_than()`
++ Add `@future()` decorator: it signals features not yet intended to be public, for instance, backported as a part of a bug fix.
 
 ## 0.6.1
 

README.md

@@ -1,6 +1,6 @@
 # SIS Unified Object Underarmor
 
-Good morning, my brother! Welcome **SUOU** (**S**IS **U**nified **O**bject **U**nderarmor), the Python library which makes API development faster for developing API's, database schemas and stuff in Python.
+Good morning, my brother! Welcome **SUOU** (**S**IS **U**nified **O**bject **U**nderarmor), the Python library which speeds up and makes it pleasing to develop API, database schemas and stuff in Python.
 
 It provides utilities such as:
 * [SIQ](https://yusur.moe/protocols/siq.html)

src/suou/__init__.py

@@ -37,7 +37,7 @@ from .redact import redact_url_password
 from .http import WantsContentType
 from .color import chalk
 
-__version__ = "0.7.0-dev37"
+__version__ = "0.7.0-dev38"
 
 __all__ = (
     'ConfigOptions', 'ConfigParserConfigSource', 'ConfigSource', 'ConfigValue',

src/suou/color.py

@@ -17,7 +17,9 @@ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 
 """
 
+from __future__ import annotations
 
+from collections import namedtuple
 from functools import lru_cache
 
 
@@ -75,5 +77,56 @@ class Chalk:
         return self._wrap(self.FAINT, self.END_BOLD)
 
 
-## TODO make it lazy?
+## TODO make it lazy / an instance variable?
 chalk = Chalk()
+
+
+## Utilities for web colors
+
+class WebColor(namedtuple('_WebColor', 'red green blue')):
+    """
+    Representation of a color in the TrueColor space (aka rgb).
+
+    Useful for theming.
+    """
+    def lighten(self, *, factor = .75):
+        """
+        Return a whitened shade of the color.
+        Factor stands between 0 and 1: 0 = total white, 1 = no change. Default is .75
+        """
+        return WebColor(
+            255 - int((255 - self.red) * factor),
+            255 - int((255 - self.green) * factor),
+            255 - int((255 - self.blue) * factor),
+        )
+    def darken(self, *, factor = .75):
+        """
+        Return a darkened shade of the color.
+        Factor stands between 0 and 1: 0 = total black, 1 = no change. Default is .75
+        """
+        return WebColor(
+            int(self.red * factor),
+            int(self.green * factor),
+            int(self.blue * factor)
+        )
+    def greyen(self, *, factor = .75):
+        """
+        Return a desaturated shade of the color.
+        Factor stands between 0 and 1: 0 = gray, 1 = no change. Default is .75
+        """
+        return self.darken(factor=factor) + self.lighten(factor=factor)
+        
+    def blend_with(self, other: WebColor):
+        """
+        Mix two colors, returning the average.
+        """
+        return WebColor (
+            (self.red + other.red) // 2,
+            (self.green + other.green) // 2,
+            (self.blue + other.blue) // 2
+        )
+
+    __add__ = blend_with
+
+    def __str__(self):
+        return f"rgb({self.red}, {self.green}, {self.blue})"

src/suou/luck.py

@@ -16,6 +16,7 @@ This software is distributed on an "AS IS" BASIS,
 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 """
 
+from functools import wraps
 from typing import Callable, Generic, Iterable, TypeVar
 import random
 from suou.exceptions import BadLuckError
@@ -34,7 +35,7 @@ def lucky(validators: Iterable[Callable[[_U], bool]] = ()):
 
     NEW 0.7.0
     """
-    def decorator(func: Callable[_T, _U]):
+    def decorator(func: Callable[..., _U]):
         @wraps(func)
         def wrapper(*args, **kwargs) -> _U:
             try:
@@ -56,7 +57,7 @@ def lucky(validators: Iterable[Callable[[_U], bool]] = ()):
 
 class RngCallable(Callable, Generic[_T, _U]):
     """
-    Overloaded ... randomly chosen callable.
+    Overloaded ...randomly chosen callable.
 
     UNTESTED
 
@@ -86,13 +87,13 @@ class RngCallable(Callable, Generic[_T, _U]):
                 choice -= w
 
 
-def rng_overload(prev_func: RngCallable[_T, _U] | int | None, /, *, weight: int = 1) -> RngCallable[_T, _U]:
+def rng_overload(prev_func: RngCallable[..., _U] | int | None, /, *, weight: int = 1) -> RngCallable[..., _U]:
     """
     Decorate the first function with @rng_overload and the weight= parameter
     (default 1, must be an integer) to create a "RNG" overloaded callable.
 
-    Each call chooses randomly one candidate (weight is taken in consideration)
-    , calls it, and returns the result.
+    Each call chooses randomly one candidate (weight is taken in consideration),
+    calls it, and returns the result.
 
     UNTESTED 
 

src/suou/validators.py

@@ -49,5 +49,11 @@ def not_greater_than(y):
     """
     return lambda x: x <= y
 
+def not_less_than(y):
+    """
+    Return a function that returns True if X is not less than (i.e. greater than or equal to) the given value.
+    """
+    return lambda x: x >= y
+
 __all__ = ('matches', 'not_greater_than')