python3-colour 0.1.5-1 / usr / lib / python3 / dist-packages / colour-0.1.5.egg-info / PKG-INFO

Metadata-Version: 1.1
Name: colour
Version: 0.1.5
Summary: converts and manipulates various color representation (HSL, RVB, web, X11, ...)
Home-page: http://github.com/vaab/colour
Author: Valentin LAB
Author-email: valentin.lab@kalysto.org
License: BSD 3-Clause License
Description-Content-Type: UNKNOWN
Description: ======
        Colour
        ======
        
        .. image:: http://img.shields.io/pypi/v/colour.svg?style=flat
           :target: https://pypi.python.org/pypi/colour/
           :alt: Latest PyPI version
        
        .. image:: https://img.shields.io/pypi/l/gitchangelog.svg?style=flat
           :target: https://github.com/vaab/gitchangelog/blob/master/LICENSE
           :alt: License
        
        .. image:: https://img.shields.io/pypi/pyversions/gitchangelog.svg?style=flat
           :target: https://pypi.python.org/pypi/gitchangelog/
           :alt: Compatible python versions
        
        .. image:: http://img.shields.io/pypi/dm/colour.svg?style=flat
           :target: https://pypi.python.org/pypi/colour/
           :alt: Number of PyPI downloads
        
        .. image:: http://img.shields.io/travis/vaab/colour/master.svg?style=flat
           :target: https://travis-ci.org/vaab/colour/
           :alt: Travis CI build status
        
        .. image:: https://img.shields.io/appveyor/ci/vaab/colour.svg
           :target: https://ci.appveyor.com/project/vaab/colour/branch/master
           :alt: Appveyor CI build status
        
        .. image:: http://img.shields.io/codecov/c/github/vaab/colour.svg?style=flat
           :target: https://codecov.io/gh/vaab/colour/
           :alt: Test coverage
        
        
        Converts and manipulates common color representation (RGB, HSL, web, ...)
        
        
        Feature
        =======
        
        - Damn simple and pythonic way to manipulate color representation (see
          examples below)
        
        - Full conversion between RGB, HSL, 6-digit hex, 3-digit hex, human color
        
        - One object (``Color``) or bunch of single purpose function (``rgb2hex``,
          ``hsl2rgb`` ...)
        
        - ``web`` format that use the smallest representation between
          6-digit (e.g. ``#fa3b2c``), 3-digit (e.g. ``#fbb``), fully spelled
          color (e.g. ``white``), following `W3C color naming`_ for compatible
          CSS or HTML color specifications.
        
        - smooth intuitive color scale generation choosing N color gradients.
        
        - can pick colors for you to identify objects of your application.
        
        
        .. _W3C color naming: http://www.w3.org/TR/css3-color/#svg-color
        
        
        Installation
        ============
        
        You don't need to download the GIT version of the code as ``colour`` is
        available on the PyPI. So you should be able to run::
        
            pip install colour
        
        If you have downloaded the GIT sources, then you could add the ``colour.py``
        directly to one of your ``site-packages`` (thanks to a symlink). Or install
        the current version via traditional::
        
            python setup.py install
        
        And if you don't have the GIT sources but would like to get the latest
        master or branch from github, you could also::
        
            pip install git+https://github.com/vaab/colour
        
        Or even select a specific revision (branch/tag/commit)::
        
            pip install git+https://github.com/vaab/colour@master
        
        
        Usage
        =====
        
        To get complete demo of each function, please read the source code which is
        heavily documented and provide a lot of examples in doctest format.
        
        Here is a reduced sample of a common usage scenario:
        
        
        Instantiation
        -------------
        
        Let's create blue color::
        
            >>> from colour import Color
            >>> c = Color("blue")
            >>> c
            <Color blue>
        
        Please note that all of these are equivalent examples to create the red color::
        
            Color("red")           ## human, web compatible representation
            Color(red=1)           ## default amount of blue and green is 0.0
            Color("blue", hue=0)   ## hue of blue is 0.66, hue of red is 0.0
            Color("#f00")          ## standard 3 hex digit web compatible representation
            Color("#ff0000")       ## standard 6 hex digit web compatible representation
            Color(hue=0, saturation=1, luminance=0.5)
            Color(hsl=(0, 1, 0.5)) ## full 3-uple HSL specification
            Color(rgb=(1, 0, 0))   ## full 3-uple RGB specification
            Color(Color("red"))    ## recursion doesn't break object
        
        
        Reading values
        --------------
        
        Several representations are accessible::
        
            >>> c.hex
            '#00f'
            >>> c.hsl  # doctest: +ELLIPSIS
            (0.66..., 1.0, 0.5)
            >>> c.rgb
            (0.0, 0.0, 1.0)
        
        And their different parts are also independently accessible, as the different
        amount of red, blue, green, in the RGB format::
        
            >>> c.red
            0.0
            >>> c.blue
            1.0
            >>> c.green
            0.0
        
        Or the hue, saturation and luminance of the HSL representation::
        
            >>> c.hue  # doctest: +ELLIPSIS
            0.66...
            >>> c.saturation
            1.0
            >>> c.luminance
            0.5
        
        A note on the ``.hex`` property, it'll return the smallest valid value
        when possible. If you are only interested by the long value, use
        ``.hex_l``::
        
            >>> c.hex_l
            '#0000ff'
        
        
        Modifying color objects
        -----------------------
        
        All of these properties are read/write, so let's add some red to this color::
        
            >>> c.red = 1
            >>> c
            <Color magenta>
        
        We might want to de-saturate this color::
        
            >>> c.saturation = 0.5
            >>> c
            <Color #bf40bf>
        
        And of course, the string conversion will give the web representation which is
        human, or 3-digit, or 6-digit hex representation depending which is usable::
        
            >>> "%s" % c
            '#bf40bf'
        
            >>> c.luminance = 1
            >>> "%s" % c
            'white'
        
        
        Ranges of colors
        ----------------
        
        You can get some color scale of variation between two ``Color`` objects quite
        easily. Here, is the color scale of the rainbow between red and blue::
        
            >>> red = Color("red")
            >>> blue = Color("blue")
            >>> list(red.range_to(blue, 5))
            [<Color red>, <Color yellow>, <Color lime>, <Color cyan>, <Color blue>]
        
        Or the different amount of gray between black and white::
        
            >>> black = Color("black")
            >>> white = Color("white")
            >>> list(black.range_to(white, 6))
            [<Color black>, <Color #333>, <Color #666>, <Color #999>, <Color #ccc>, <Color white>]
        
        
        If you have to create graphical representation with color scale
        between red and green ('lime' color is full green)::
        
            >>> lime = Color("lime")
            >>> list(red.range_to(lime, 5))
            [<Color red>, <Color #ff7f00>, <Color yellow>, <Color chartreuse>, <Color lime>]
        
        Notice how naturally, the yellow is displayed in human format and in
        the middle of the scale. And that the quite unusual (but compatible)
        'chartreuse' color specification has been used in place of the
        hexadecimal representation.
        
        
        Color comparison
        ----------------
        
        Sane default
        ~~~~~~~~~~~~
        
        Color comparison is a vast subject. However, it might seem quite straightforward for
        you. ``Colour`` uses a configurable default way of comparing color that might suit
        your needs::
        
            >>> Color("red") == Color("#f00") == Color("blue", hue=0)
            True
        
        The default comparison algorithm focuses only on the "web" representation which is
        equivalent to comparing the long hex representation (e.g. #FF0000) or to be more
        specific, it is equivalent to compare the amount of red, green, and blue composition
        of the RGB representation, each of these value being quantized to a 256 value scale.
        
        This default comparison is a practical and convenient way to measure the actual
        color equivalence on your screen, or in your video card memory.
        
        But this comparison wouldn't make the difference between a black red, and a
        black blue, which both are black::
        
           >>> black_red = Color("red", luminance=0)
           >>> black_blue = Color("blue", luminance=0)
        
           >>> black_red == black_blue
           True
        
        
        Customization
        ~~~~~~~~~~~~~
        
        But, this is not the sole way to compare two colors. As I'm quite lazy, I'm providing
        you a way to customize it to your needs. Thus::
        
           >>> from colour import RGB_equivalence, HSL_equivalence
           >>> black_red = Color("red", luminance=0, equality=HSL_equivalence)
           >>> black_blue = Color("blue", luminance=0, equality=HSL_equivalence)
        
           >>> black_red == black_blue
           False
        
        As you might have already guessed, the sane default is ``RGB_equivalence``, so::
        
           >>> black_red = Color("red", luminance=0, equality=RGB_equivalence)
           >>> black_blue = Color("blue", luminance=0, equality=RGB_equivalence)
        
           >>> black_red == black_blue
           True
        
        Here's how you could implement your unique comparison function::
        
           >>> saturation_equivalence = lambda c1, c2: c1.saturation == c2.saturation
           >>> red = Color("red", equality=saturation_equivalence)
           >>> blue = Color("blue", equality=saturation_equivalence)
           >>> white = Color("white", equality=saturation_equivalence)
        
           >>> red == blue
           True
           >>> white == red
           False
        
        Note: When comparing 2 colors, *only* the equality function *of the first
        color will be used*. Thus::
        
           >>> black_red = Color("red", luminance=0, equality=RGB_equivalence)
           >>> black_blue = Color("blue", luminance=0, equality=HSL_equivalence)
        
           >>> black_red == black_blue
           True
        
        But reverse operation is not equivalent !::
        
           >>> black_blue == black_red
           False
        
        
        Equality to non-Colour objects
        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
        
        As a side note, whatever your custom equality function is, it won't be
        used if you compare to anything else than a ``Colour`` instance::
        
            >>> red = Color("red", equality=lambda c1, c2: True)
            >>> blue = Color("blue", equality=lambda c1, c2: True)
        
        Note that these instances would compare as equal to any other color::
        
            >>> red == blue
            True
        
        But on another non-Colour object::
        
            >>> red == None
            False
            >>> red != None
            True
        
        Actually, ``Colour`` instances will, politely enough, leave
        the other side of the equality have a chance to decide of the output,
        (by executing its own ``__eq__``), so::
        
            >>> class OtherColorImplem(object):
            ...     def __init__(self, color):
            ...         self.color = color
            ...     def __eq__(self, other):
            ...         return self.color == other.web
        
            >>> alien_red = OtherColorImplem("red")
            >>> red == alien_red
            True
            >>> blue == alien_red
            False
        
        And inequality (using ``__ne__``) are also polite::
        
            >>> class AnotherColorImplem(OtherColorImplem):
            ...     def __ne__(self, other):
            ...         return self.color != other.web
        
            >>> new_alien_red = AnotherColorImplem("red")
            >>> red != new_alien_red
            False
            >>> blue != new_alien_red
            True
        
        
        Picking arbitrary color for a python object
        -------------------------------------------
        
        Basic Usage
        ~~~~~~~~~~~
        
        Sometimes, you just want to pick a color for an object in your application
        often to visually identify this object. Thus, the picked color should be the
        same for same objects, and different for different object::
        
            >>> foo = object()
            >>> bar = object()
        
            >>> Color(pick_for=foo)  # doctest: +ELLIPSIS
            <Color ...>
            >>> Color(pick_for=foo) == Color(pick_for=foo)
            True
            >>> Color(pick_for=foo) == Color(pick_for=bar)
            False
        
        Of course, although there's a tiny probability that different strings yield the
        same color, most of the time, different inputs will produce different colors.
        
        Advanced Usage
        ~~~~~~~~~~~~~~
        
        You can customize your color picking algorithm by providing a ``picker``. A
        ``picker`` is a callable that takes an object, and returns something that can
        be instantiated as a color by ``Color``::
        
            >>> my_picker = lambda obj: "red" if isinstance(obj, int) else "blue"
            >>> Color(pick_for=3, picker=my_picker, pick_key=None)
            <Color red>
            >>> Color(pick_for="foo", picker=my_picker, pick_key=None)
            <Color blue>
        
        You might want to use a particular picker, but enforce how the picker will
        identify two object as the same (or not). So there's a ``pick_key`` attribute
        that is provided and defaults as equivalent of ``hash`` method and if hash is
        not supported by your object, it'll default to the ``str`` of your object salted
        with the class name.
        
        Thus::
        
            >>> class MyObj(str): pass
            >>> my_obj_color = Color(pick_for=MyObj("foo"))
            >>> my_str_color = Color(pick_for="foo")
            >>> my_obj_color == my_str_color
            False
        
        Please make sure your object is hashable or "stringable" before using the
        ``RGB_color_picker`` picking mechanism or provide another color picker. Nearly
        all python object are hashable by default so this shouldn't be an issue (e.g. 
        instances of ``object`` and subclasses are hashable).
        
        Neither ``hash`` nor ``str`` are perfect solution. So feel free to use
        ``pick_key`` at ``Color`` instantiation time to set your way to identify
        objects, for instance::
        
            >>> a = object()
            >>> b = object()
            >>> Color(pick_for=a, pick_key=id) == Color(pick_for=b, pick_key=id)
            False
        
        When choosing a pick key, you should closely consider if you want your color
        to be consistent between runs (this is NOT the case with the last example),
        or consistent with the content of your object if it is a mutable object.
        
        Default value of ``pick_key`` and ``picker`` ensures that the same color will
        be attributed to same object between different run on different computer for
        most python object.
        
        
        Color factory
        -------------
        
        As you might have noticed, there are few attributes that you might want to see
        attached to all of your colors as ``equality`` for equality comparison support,
        or ``picker``, ``pick_key`` to configure your object color picker.
        
        You can create a customized ``Color`` factory thanks to the ``make_color_factory``::
        
            >>> from colour import make_color_factory, HSL_equivalence, RGB_color_picker
        
            >>> get_color = make_color_factory(
            ...    equality=HSL_equivalence,
            ...    picker=RGB_color_picker,
            ...    pick_key=str,
            ... )
        
        All color created thanks to ``CustomColor`` class instead of the default one
        would get the specified attributes by default::
        
            >>> black_red = get_color("red", luminance=0)
            >>> black_blue = get_color("blue", luminance=0)
        
        Of course, these are always instances of ``Color`` class::
        
            >>> isinstance(black_red, Color)
            True
        
        Equality was changed from normal defaults, so::
        
            >>> black_red == black_blue
            False
        
        This because the default equivalence of ``Color`` was set to
        ``HSL_equivalence``.
        
        
        Contributing
        ============
        
        Any suggestion or issue is welcome. Push request are very welcome,
        please check out the guidelines.
        
        
        Push Request Guidelines
        -----------------------
        
        You can send any code. I'll look at it and will integrate it myself in
        the code base and leave you as the author. This process can take time and
        it'll take less time if you follow the following guidelines:
        
        - check your code with PEP8 or pylint. Try to stick to 80 columns wide.
        - separate your commits per smallest concern.
        - each commit should pass the tests (to allow easy bisect)
        - each functionality/bugfix commit should contain the code, tests,
          and doc.
        - prior minor commit with typographic or code cosmetic changes are
          very welcome. These should be tagged in their commit summary with
          ``!minor``.
        - the commit message should follow gitchangelog rules (check the git
          log to get examples)
        - if the commit fixes an issue or finished the implementation of a
          feature, please mention it in the summary.
        
        If you have some questions about guidelines which is not answered here,
        please check the current ``git log``, you might find previous commit that
        would show you how to deal with your issue.
        
        
        License
        =======
        
        Copyright (c) 2012-2017 Valentin Lab.
        
        Licensed under the `BSD License`_.
        
        .. _BSD License: http://raw.github.com/vaab/colour/master/LICENSE
        
        Changelog
        =========
        
        
        0.1.4 (2017-04-19)
        ------------------
        
        Fix
        ~~~
        - ``rgb2hsl`` would produce invalid hsl triplet when red, blue, green
          component would be all very close to ``1.0``. (fixes #30) [Valentin
          Lab]
        
          Typically, saturation would shoot out of range 0.0..1.0. That could then
          lead to exceptions being casts afterwards when trying to reconvert this
          HSL triplet to RGB values.
        
        
        0.1.3 (2017-04-08)
        ------------------
        
        Fix
        ~~~
        - Unexpected behavior with ``!=`` operator. (fixes #26) [Valentin Lab]
        - Added mention of the ``hex_l`` property. (fixes #27) [Valentin Lab]
        
        
        0.1.2 (2015-09-15)
        ------------------
        
        Fix
        ~~~
        - Support for corner case 1-wide ``range_to`` color scale. (fixes #18)
          [Valentin Lab]
        
        
        0.1.1 (2015-03-29)
        ------------------
        
        Fix
        ~~~
        - Avoid casting an exception when comparing to non-``Colour`` instances.
          (fixes #14) [Riziq Sayegh]
        
        
        0.0.6 (2014-11-18)
        ------------------
        
        New
        ~~~
        - Provide all missing *2* function by combination with other existing
          ones (fixes #13). [Valentin Lab]
        - Provide full access to any color name in HSL, RGB, HEX convenience
          instances. [Valentin Lab]
        
          Now you can call ``colour.HSL.cyan``, or ``colour.HEX.red`` for a direct encoding of
          ``human`` colour labels to the 3 representations.
        
        
        0.0.5 (2013-09-16)
        ------------------
        
        New
        ~~~
        - Color names are case insensitive. [Chris Priest]
        
          The color-name structure have their names capitalized. And color names
          that are made of only one word will be displayed lowercased.
        
        Fix
        ~~~
        - Now using W3C color recommandation. [Chris Priest]
        
          Was using X11 color scheme before, which is slightly different from
          W3C web color specifications.
        - Inconsistency in licence information (removed GPL mention). (fixes #8)
          [Valentin Lab]
        - Removed ``gitchangelog`` from ``setup.py`` require list. (fixes #9)
          [Valentin Lab]
        
        
        0.0.4 (2013-06-21)
        ------------------
        
        New
        ~~~
        - Added ``make_color_factory`` to customize some common color
          attributes. [Valentin Lab]
        - Pick color to identify any python object (fixes #6) [Jonathan Ballet]
        - Equality support between colors, customizable if needed. (fixes #3)
          [Valentin Lab]
        
        
        0.0.3 (2013-06-19)
        ------------------
        
        New
        ~~~
        - Colour is now compatible with python3. [Ryan Leckey]
        
        
        0.0.1 (2012-06-11)
        ------------------
        - First import. [Valentin Lab]
        
        TODO
        ====
        
        - ANSI 16-color and 256-color escape sequence generation
        - YUV, HSV, CMYK support
        
        
Platform: UNKNOWN
Classifier: Programming Language :: Python
Classifier: Topic :: Software Development :: Libraries :: Python Modules
Classifier: Development Status :: 3 - Alpha
Classifier: License :: OSI Approved :: BSD License
Classifier: Intended Audience :: Developers
Classifier: Programming Language :: Python :: 2
Classifier: Programming Language :: Python :: 2.7
Classifier: Programming Language :: Python :: 3
Classifier: Programming Language :: Python :: 3.3
Classifier: Programming Language :: Python :: 3.4
Classifier: Programming Language :: Python :: 3.5
Classifier: Programming Language :: Python :: 3.6