prompt: We are currently solving the following issue within our repository. Here is the issue text:
  --- BEGIN ISSUE ---
  setting foreground in extension_defaults result with non working CommandSet
  # Issue description
  
  setting `foreground` in `extension_defaults` result that `CommandSet` don't appear at all
  probably other extension don't work too
  # Qtile version
  
  0.18.1 up to latest git commit
  
  # Stack traces
  
  ```
  error, cannot allocate color 'ffffff'
  ```
  # Configuration
  
  ```
  key_exensions = Key([mod], 's',
                      lazy.run_extension(
                          extension.CommandSet(
                              commands={
                                  'reboot': 'reboot',
                                  'shutdown': 'shutdown',
                                  'suspend': 'systemctl suspend',
                                  'lock session': '/home/tokariew/.local/bin/lockme',
                                  'restart qtile': 'qtile cmd-obj -o cmd -f restart',
                                  'lazy restart': 'lazy.restart',
                                  'logout': 'qtile cmd-obj -o cmd -f shutdown',
                              },
                              dmenu_lines=6
                          )
                      )),
  
  keys.extend(key_exensions)
  
  extension_defaults = dict(
      font="FiraCode Nerd Font",
      fontsize=14,
      padding=4,
      padding_y=0,
      foreground='ffffff',
  )
  ```
  
  
  --- END ISSUE ---
  
  Below are some code segments, each from a relevant file. One or more of these files may contain bugs.
  --- BEGIN FILES ---
  Path: `libqtile/extension/base.py`
  Content:
  ```
  1 # Copyright (c) 2017 Dario Giovannetti
  2 #
  3 # Permission is hereby granted, free of charge, to any person obtaining a copy
  4 # of this software and associated documentation files (the "Software"), to deal
  5 # in the Software without restriction, including without limitation the rights
  6 # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  7 # copies of the Software, and to permit persons to whom the Software is
  8 # furnished to do so, subject to the following conditions:
  9 #
  10 # The above copyright notice and this permission notice shall be included in
  11 # all copies or substantial portions of the Software.
  12 #
  13 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  14 # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  15 # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  16 # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  17 # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  18 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  19 # SOFTWARE.
  20 
  21 import shlex
  22 from subprocess import PIPE, Popen
  23 from typing import Any, List, Tuple  # noqa: F401
  24 
  25 from libqtile import configurable
  26 
  27 
  28 class _Extension(configurable.Configurable):
  29     """Base Extension class"""
  30 
  31     installed_extensions = []  # type: List
  32 
  33     defaults = [
  34         ("font", "sans", "defines the font name to be used"),
  35         ("fontsize", None, "defines the font size to be used"),
  36         ("background", None, "defines the normal background color"),
  37         ("foreground", None, "defines the normal foreground color"),
  38         ("selected_background", None, "defines the selected background color"),
  39         ("selected_foreground", None, "defines the selected foreground color"),
  40     ]
  41 
  42     def __init__(self, **config):
  43         configurable.Configurable.__init__(self, **config)
  44         self.add_defaults(_Extension.defaults)
  45         _Extension.installed_extensions.append(self)
  46 
  47     def _configure(self, qtile):
  48         self.qtile = qtile
  49 
  50     def run(self):
  51         """
  52         This method must be implemented by the subclasses.
  53         """
  54         raise NotImplementedError()
  55 
  56 
  57 class RunCommand(_Extension):
  58     """
  59     Run an arbitrary command.
  60 
  61     Mostly useful as a superclass for more specific extensions that need to
  62     interact with the qtile object.
  63 
  64     Also consider simply using lazy.spawn() or writing a
  65     `client <http://docs.qtile.org/en/latest/manual/commands/scripting.html>`_.
  66     """
  67     defaults = [
  68         # NOTE: Do not use a list as a default value, since it would be shared
  69         #       among all the objects inheriting this class, and if one of them
  70         #       modified it, all the other objects would see the modified list;
  71         #       use a string or a tuple instead, which are immutable
  72         ("command", None, "the command to be launched (string or list with arguments)"),
  73     ]  # type: List[Tuple[str, Any, str]]
  74 
  75     def __init__(self, **config):
  76         _Extension.__init__(self, **config)
  77         self.add_defaults(RunCommand.defaults)
  78 
  79     def run(self):
  80         """
  81         An extension can inherit this class, define configured_command and use
  82         the process object by overriding this method and using super():
  83 
  84         .. code-block:: python
  85 
  86             def _configure(self, qtile):
  87                 Superclass._configure(self, qtile)
  88                 self.configured_command = "foo --bar"
  89 
  90             def run(self):
  91                 process = super(Subclass, self).run()
  92         """
  93         if self.configured_command:
  94             if isinstance(self.configured_command, str):
  95                 self.configured_command = shlex.split(self.configured_command)
  96             # Else assume that self.configured_command is already a sequence
  97         else:
  98             self.configured_command = self.command
  99         return Popen(self.configured_command, stdout=PIPE, stdin=PIPE)
  100
  ```
  --- END FILES ---
  
  Please first localize the bug based on the issue statement, and then generate a patch according to the `git diff` format fenced by three backticks.
  
  Here is an example:
  
  ```diff
  diff --git a/examples/server_async.py b/examples/server_async.py
  --- a/examples/server_async.py
  +++ b/examples/server_async.py
  @@ -313,4 +313,4 @@
   
   
   if __name__ == "__main__":
  -    asyncio.run(run_async_server("."), debug=True)
  +    asyncio.run(run_async_server(), debug=True)
  diff --git a/examples/server_sync.py b/examples/server_sync.py
  --- a/examples/server_sync.py
  +++ b/examples/server_sync.py
  @@ -313,5 +313,5 @@
   
   
   if __name__ == "__main__":
  -    server = run_sync_server(".")
  +    server = run_sync_server()
       server.shutdown()
  
  ```
  
golden_diff: diff --git a/libqtile/extension/base.py b/libqtile/extension/base.py
  --- a/libqtile/extension/base.py
  +++ b/libqtile/extension/base.py
  @@ -1,4 +1,5 @@
   # Copyright (c) 2017 Dario Giovannetti
  +# Copyright (c) 2021 elParaguayo
   #
   # Permission is hereby granted, free of charge, to any person obtaining a copy
   # of this software and associated documentation files (the "Software"), to deal
  @@ -17,12 +18,15 @@
   # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
   # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
   # SOFTWARE.
  -
  +import re
   import shlex
   from subprocess import PIPE, Popen
   from typing import Any, List, Tuple  # noqa: F401
   
   from libqtile import configurable
  +from libqtile.log_utils import logger
  +
  +RGB = re.compile(r"^#?([a-fA-F0-9]{3}|[a-fA-F0-9]{6})$")
   
   
   class _Extension(configurable.Configurable):
  @@ -33,16 +37,40 @@
       defaults = [
           ("font", "sans", "defines the font name to be used"),
           ("fontsize", None, "defines the font size to be used"),
  -        ("background", None, "defines the normal background color"),
  -        ("foreground", None, "defines the normal foreground color"),
  -        ("selected_background", None, "defines the selected background color"),
  -        ("selected_foreground", None, "defines the selected foreground color"),
  +        ("background", None, "defines the normal background color (#RGB or #RRGGBB)"),
  +        ("foreground", None, "defines the normal foreground color (#RGB or #RRGGBB)"),
  +        ("selected_background", None, "defines the selected background color (#RGB or #RRGGBB)"),
  +        ("selected_foreground", None, "defines the selected foreground color (#RGB or #RRGGBB)"),
       ]
   
       def __init__(self, **config):
           configurable.Configurable.__init__(self, **config)
           self.add_defaults(_Extension.defaults)
           _Extension.installed_extensions.append(self)
  +        self._check_colors()
  +
  +    def _check_colors(self):
  +        """
  +        dmenu needs colours to be in #rgb or #rrggbb format.
  +
  +        Checks colour value, removes invalid values and adds # if missing.
  +        """
  +        for c in ["background", "foreground", "selected_background", "selected_foreground"]:
  +            col = getattr(self, c, None)
  +            if col is None:
  +                continue
  +
  +            if not isinstance(col, str) or not RGB.match(col):
  +                logger.warning(
  +                    f"Invalid extension '{c}' color: {col}. "
  +                    f"Must be #RGB or #RRGGBB string."
  +                )
  +                setattr(self, c, None)
  +                continue
  +
  +            if not col.startswith("#"):
  +                col = f"#{col}"
  +                setattr(self, c, col)
   
       def _configure(self, qtile):
           self.qtile = qtile
  
verification_info: {"golden_diff": "diff --git a/libqtile/extension/base.py b/libqtile/extension/base.py\n--- a/libqtile/extension/base.py\n+++ b/libqtile/extension/base.py\n@@ -1,4 +1,5 @@\n # Copyright (c) 2017 Dario Giovannetti\n+# Copyright (c) 2021 elParaguayo\n #\n # Permission is hereby granted, free of charge, to any person obtaining a copy\n # of this software and associated documentation files (the \"Software\"), to deal\n@@ -17,12 +18,15 @@\n # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\n # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE\n # SOFTWARE.\n-\n+import re\n import shlex\n from subprocess import PIPE, Popen\n from typing import Any, List, Tuple  # noqa: F401\n \n from libqtile import configurable\n+from libqtile.log_utils import logger\n+\n+RGB = re.compile(r\"^#?([a-fA-F0-9]{3}|[a-fA-F0-9]{6})$\")\n \n \n class _Extension(configurable.Configurable):\n@@ -33,16 +37,40 @@\n     defaults = [\n         (\"font\", \"sans\", \"defines the font name to be used\"),\n         (\"fontsize\", None, \"defines the font size to be used\"),\n-        (\"background\", None, \"defines the normal background color\"),\n-        (\"foreground\", None, \"defines the normal foreground color\"),\n-        (\"selected_background\", None, \"defines the selected background color\"),\n-        (\"selected_foreground\", None, \"defines the selected foreground color\"),\n+        (\"background\", None, \"defines the normal background color (#RGB or #RRGGBB)\"),\n+        (\"foreground\", None, \"defines the normal foreground color (#RGB or #RRGGBB)\"),\n+        (\"selected_background\", None, \"defines the selected background color (#RGB or #RRGGBB)\"),\n+        (\"selected_foreground\", None, \"defines the selected foreground color (#RGB or #RRGGBB)\"),\n     ]\n \n     def __init__(self, **config):\n         configurable.Configurable.__init__(self, **config)\n         self.add_defaults(_Extension.defaults)\n         _Extension.installed_extensions.append(self)\n+        self._check_colors()\n+\n+    def _check_colors(self):\n+        \"\"\"\n+        dmenu needs colours to be in #rgb or #rrggbb format.\n+\n+        Checks colour value, removes invalid values and adds # if missing.\n+        \"\"\"\n+        for c in [\"background\", \"foreground\", \"selected_background\", \"selected_foreground\"]:\n+            col = getattr(self, c, None)\n+            if col is None:\n+                continue\n+\n+            if not isinstance(col, str) or not RGB.match(col):\n+                logger.warning(\n+                    f\"Invalid extension '{c}' color: {col}. \"\n+                    f\"Must be #RGB or #RRGGBB string.\"\n+                )\n+                setattr(self, c, None)\n+                continue\n+\n+            if not col.startswith(\"#\"):\n+                col = f\"#{col}\"\n+                setattr(self, c, col)\n \n     def _configure(self, qtile):\n         self.qtile = qtile\n", "issue": "setting foreground in extension_defaults result with non working CommandSet\n# Issue description\r\n\r\nsetting `foreground` in `extension_defaults` result that `CommandSet` don't appear at all\r\nprobably other extension don't work too\r\n# Qtile version\r\n\r\n0.18.1 up to latest git commit\r\n\r\n# Stack traces\r\n\r\n```\r\nerror, cannot allocate color 'ffffff'\r\n```\r\n# Configuration\r\n\r\n```\r\nkey_exensions = Key([mod], 's',\r\n                    lazy.run_extension(\r\n                        extension.CommandSet(\r\n                            commands={\r\n                                'reboot': 'reboot',\r\n                                'shutdown': 'shutdown',\r\n                                'suspend': 'systemctl suspend',\r\n                                'lock session': '/home/tokariew/.local/bin/lockme',\r\n                                'restart qtile': 'qtile cmd-obj -o cmd -f restart',\r\n                                'lazy restart': 'lazy.restart',\r\n                                'logout': 'qtile cmd-obj -o cmd -f shutdown',\r\n                            },\r\n                            dmenu_lines=6\r\n                        )\r\n                    )),\r\n\r\nkeys.extend(key_exensions)\r\n\r\nextension_defaults = dict(\r\n    font=\"FiraCode Nerd Font\",\r\n    fontsize=14,\r\n    padding=4,\r\n    padding_y=0,\r\n    foreground='ffffff',\r\n)\r\n```\r\n\n", "before_files": [{"content": "# Copyright (c) 2017 Dario Giovannetti\n#\n# Permission is hereby granted, free of charge, to any person obtaining a copy\n# of this software and associated documentation files (the \"Software\"), to deal\n# in the Software without restriction, including without limitation the rights\n# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell\n# copies of the Software, and to permit persons to whom the Software is\n# furnished to do so, subject to the following conditions:\n#\n# The above copyright notice and this permission notice shall be included in\n# all copies or substantial portions of the Software.\n#\n# THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\n# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\n# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE\n# SOFTWARE.\n\nimport shlex\nfrom subprocess import PIPE, Popen\nfrom typing import Any, List, Tuple  # noqa: F401\n\nfrom libqtile import configurable\n\n\nclass _Extension(configurable.Configurable):\n    \"\"\"Base Extension class\"\"\"\n\n    installed_extensions = []  # type: List\n\n    defaults = [\n        (\"font\", \"sans\", \"defines the font name to be used\"),\n        (\"fontsize\", None, \"defines the font size to be used\"),\n        (\"background\", None, \"defines the normal background color\"),\n        (\"foreground\", None, \"defines the normal foreground color\"),\n        (\"selected_background\", None, \"defines the selected background color\"),\n        (\"selected_foreground\", None, \"defines the selected foreground color\"),\n    ]\n\n    def __init__(self, **config):\n        configurable.Configurable.__init__(self, **config)\n        self.add_defaults(_Extension.defaults)\n        _Extension.installed_extensions.append(self)\n\n    def _configure(self, qtile):\n        self.qtile = qtile\n\n    def run(self):\n        \"\"\"\n        This method must be implemented by the subclasses.\n        \"\"\"\n        raise NotImplementedError()\n\n\nclass RunCommand(_Extension):\n    \"\"\"\n    Run an arbitrary command.\n\n    Mostly useful as a superclass for more specific extensions that need to\n    interact with the qtile object.\n\n    Also consider simply using lazy.spawn() or writing a\n    `client <http://docs.qtile.org/en/latest/manual/commands/scripting.html>`_.\n    \"\"\"\n    defaults = [\n        # NOTE: Do not use a list as a default value, since it would be shared\n        #       among all the objects inheriting this class, and if one of them\n        #       modified it, all the other objects would see the modified list;\n        #       use a string or a tuple instead, which are immutable\n        (\"command\", None, \"the command to be launched (string or list with arguments)\"),\n    ]  # type: List[Tuple[str, Any, str]]\n\n    def __init__(self, **config):\n        _Extension.__init__(self, **config)\n        self.add_defaults(RunCommand.defaults)\n\n    def run(self):\n        \"\"\"\n        An extension can inherit this class, define configured_command and use\n        the process object by overriding this method and using super():\n\n        .. code-block:: python\n\n            def _configure(self, qtile):\n                Superclass._configure(self, qtile)\n                self.configured_command = \"foo --bar\"\n\n            def run(self):\n                process = super(Subclass, self).run()\n        \"\"\"\n        if self.configured_command:\n            if isinstance(self.configured_command, str):\n                self.configured_command = shlex.split(self.configured_command)\n            # Else assume that self.configured_command is already a sequence\n        else:\n            self.configured_command = self.command\n        return Popen(self.configured_command, stdout=PIPE, stdin=PIPE)\n", "path": "libqtile/extension/base.py"}], "after_files": [{"content": "# Copyright (c) 2017 Dario Giovannetti\n# Copyright (c) 2021 elParaguayo\n#\n# Permission is hereby granted, free of charge, to any person obtaining a copy\n# of this software and associated documentation files (the \"Software\"), to deal\n# in the Software without restriction, including without limitation the rights\n# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell\n# copies of the Software, and to permit persons to whom the Software is\n# furnished to do so, subject to the following conditions:\n#\n# The above copyright notice and this permission notice shall be included in\n# all copies or substantial portions of the Software.\n#\n# THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\n# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\n# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE\n# SOFTWARE.\nimport re\nimport shlex\nfrom subprocess import PIPE, Popen\nfrom typing import Any, List, Tuple  # noqa: F401\n\nfrom libqtile import configurable\nfrom libqtile.log_utils import logger\n\nRGB = re.compile(r\"^#?([a-fA-F0-9]{3}|[a-fA-F0-9]{6})$\")\n\n\nclass _Extension(configurable.Configurable):\n    \"\"\"Base Extension class\"\"\"\n\n    installed_extensions = []  # type: List\n\n    defaults = [\n        (\"font\", \"sans\", \"defines the font name to be used\"),\n        (\"fontsize\", None, \"defines the font size to be used\"),\n        (\"background\", None, \"defines the normal background color (#RGB or #RRGGBB)\"),\n        (\"foreground\", None, \"defines the normal foreground color (#RGB or #RRGGBB)\"),\n        (\"selected_background\", None, \"defines the selected background color (#RGB or #RRGGBB)\"),\n        (\"selected_foreground\", None, \"defines the selected foreground color (#RGB or #RRGGBB)\"),\n    ]\n\n    def __init__(self, **config):\n        configurable.Configurable.__init__(self, **config)\n        self.add_defaults(_Extension.defaults)\n        _Extension.installed_extensions.append(self)\n        self._check_colors()\n\n    def _check_colors(self):\n        \"\"\"\n        dmenu needs colours to be in #rgb or #rrggbb format.\n\n        Checks colour value, removes invalid values and adds # if missing.\n        \"\"\"\n        for c in [\"background\", \"foreground\", \"selected_background\", \"selected_foreground\"]:\n            col = getattr(self, c, None)\n            if col is None:\n                continue\n\n            if not isinstance(col, str) or not RGB.match(col):\n                logger.warning(\n                    f\"Invalid extension '{c}' color: {col}. \"\n                    f\"Must be #RGB or #RRGGBB string.\"\n                )\n                setattr(self, c, None)\n                continue\n\n            if not col.startswith(\"#\"):\n                col = f\"#{col}\"\n                setattr(self, c, col)\n\n    def _configure(self, qtile):\n        self.qtile = qtile\n\n    def run(self):\n        \"\"\"\n        This method must be implemented by the subclasses.\n        \"\"\"\n        raise NotImplementedError()\n\n\nclass RunCommand(_Extension):\n    \"\"\"\n    Run an arbitrary command.\n\n    Mostly useful as a superclass for more specific extensions that need to\n    interact with the qtile object.\n\n    Also consider simply using lazy.spawn() or writing a\n    `client <http://docs.qtile.org/en/latest/manual/commands/scripting.html>`_.\n    \"\"\"\n    defaults = [\n        # NOTE: Do not use a list as a default value, since it would be shared\n        #       among all the objects inheriting this class, and if one of them\n        #       modified it, all the other objects would see the modified list;\n        #       use a string or a tuple instead, which are immutable\n        (\"command\", None, \"the command to be launched (string or list with arguments)\"),\n    ]  # type: List[Tuple[str, Any, str]]\n\n    def __init__(self, **config):\n        _Extension.__init__(self, **config)\n        self.add_defaults(RunCommand.defaults)\n\n    def run(self):\n        \"\"\"\n        An extension can inherit this class, define configured_command and use\n        the process object by overriding this method and using super():\n\n        .. code-block:: python\n\n            def _configure(self, qtile):\n                Superclass._configure(self, qtile)\n                self.configured_command = \"foo --bar\"\n\n            def run(self):\n                process = super(Subclass, self).run()\n        \"\"\"\n        if self.configured_command:\n            if isinstance(self.configured_command, str):\n                self.configured_command = shlex.split(self.configured_command)\n            # Else assume that self.configured_command is already a sequence\n        else:\n            self.configured_command = self.command\n        return Popen(self.configured_command, stdout=PIPE, stdin=PIPE)\n", "path": "libqtile/extension/base.py"}]}