Metadata-Version: 2.1
Name: editabletuple
Version: 1.0.1
Summary: Provides the editabletuple function for creating classes with a fixed sequence of fields, similar to a namedtuple, except editable
Home-page: https://github.com/mark-summerfield/editabletuple
Author: Mark Summerfield
Author-email: mark@qtrac.eu
License: GPLv3
Description: # editabletuple
        
        This module provides the `editabletuple()` function for creating classes
        with a fixed sequence of fields, similar to a namedtuple, except editable.
        
        Each instance of a class created by the editabletuple function's fields can
        be accessed by index et[i] or by fieldname et.name.
        
        To install just use `python3 -m pip install editabletuple`.
        
        Or just copy the `editabletuple.py` file which is self-contained and depends
        only on the standard library.
        
        ## Example #1: no defaults; no validator
        
            >>> Options = editabletuple('Options', 'maxcolors shape zoom restore')
            >>> options = Options(5, 'square', 0.9, True)
            >>> options
            Options(maxcolors=5, shape='square', zoom=0.9, restore=True)
            >>> options.maxcolors = 7
            >>> options[-1] = False
            >>> options[2] -= 0.1
            >>> options
            Options(maxcolors=7, shape='square', zoom=0.8, restore=False)
        
        ## Example #2: with defaults but no validator
        
            >>> Rgb = editabletuple('Rgb', 'red green blue', defaults=(0, 0, 0))
            >>> black = Rgb()
            >>> black
            Rgb(red=0, green=0, blue=0)
            >>> navy = Rgb(blue=128)
            >>> navy
            Rgb(red=0, green=0, blue=128)
            >>> violet = Rgb(238, 130, 238)
            >>> violet
            Rgb(red=238, green=130, blue=238)
        
        ## Example #3: with defaults and a validator
        
            >>> def validate_rgba(self, index, value):
            ...     if index == 3: # alpha channel
            ...         if not (0.0 <= value <= 1.0):
            ...             self[index] = 1.0 # silently default to opaque
            ...     elif not (0 <= value <= 255):
            ...         raise ValueError(f'color value must be 0-255, got {value}')
            >>>
            >>> Rgba = editabletuple('Rgba', 'red', 'green', 'blue', 'alpha',
            ...                      defaults=(0, 0, 0, 1.0), validator=validate_rgba)
            >>> black = Rgba()
            >>> black
            Rgba(red=0, green=0, blue=0, alpha=1.0)
            >>> seminavy = Rgba(blue=128, alpha=0.5)
            >>> seminavy
            Rgba(red=0, green=0, blue=128, alpha=0.5)
            >>> violet = Rgba(238, 130, 238, alpha=2.5) # alpha too big
            >>> violet
            Rgba(red=238, green=130, blue=238, alpha=1.0)
            >>>
            >>> color = Rgba(green=99)
            >>> color
            Rgba(red=0, green=99, blue=0, alpha=1.0)
            >>> assert color.green == 99
            >>> color.red = 128
            >>> assert color[2] == 0
            >>> color[2] = 240
            >>> assert color[2] == 240
            >>> color[-1] = 0.5
            >>> color
            Rgba(red=128, green=99, blue=240, alpha=0.5)
            >>> color[1] = 299
            Traceback (most recent call last):
                ...
            ValueError: color value must be 0-255, got 299
            >>> color.blue = -65
            Traceback (most recent call last):
                ...
            ValueError: color value must be 0-255, got -65
        
        Curiously, on Python 3.8.10 and 3.10.4 on 64-bit Linux I get these results:
        
            import sys
            from collections import namedtuple
            from editabletuple import editabletuple
        
            t = (1, 2, 3)
            N = namedtuple('N', 'x y z')
            n = N(1, 2, 3)
            E = editabletuple('E', 'x', 'y', 'z')
            e = E(1, 2, 3)
        
            for x in (t, n, e):
                print(sys.getsizeof(x), x)
        
            # output:
            #   64 (1, 2, 3)
            #   64 N(x=1, y=2, z=3)
            #   56 E(x=1, y=2, z=3)
        
        **License: GPLv3**
        
Platform: UNKNOWN
Classifier: Development Status :: 5 - Production/Stable
Classifier: Intended Audience :: Developers
Classifier: License :: OSI Approved :: GNU General Public License v3 (GPLv3)
Classifier: Programming Language :: Python :: 3
Classifier: Programming Language :: Python :: 3.8
Classifier: Topic :: Software Development :: Libraries
Requires-Python: >=3.8
Description-Content-Type: text/markdown
