class_docstr: Format tokens as HTML 4 ``<span>`` tags. By default, the content is enclosed
  in a ``<pre>`` tag, itself wrapped in a ``<div>`` tag (but see the `nowrap` option).
  The ``<div>``'s CSS class can be set by the `cssclass` option.
  
  If the `linenos` option is set to ``"table"``, the ``<pre>`` is
  additionally wrapped inside a ``<table>`` which has one row and two
  cells: one containing the line numbers and one containing the code.
  Example:
  
  .. sourcecode:: html
  
      <div class="highlight" >
      <table><tr>
        <td class="linenos" title="click to toggle"
          onclick="with (this.firstChild.style)
                   { display = (display == '') ? 'none' : '' }">
          <pre>1
          2</pre>
        </td>
        <td class="code">
          <pre><span class="Ke">def </span><span class="NaFu">foo</span>(bar):
            <span class="Ke">pass</span>
          </pre>
        </td>
      </tr></table></div>
  
  (whitespace added to improve clarity).
  
  A list of lines can be specified using the `hl_lines` option to make these
  lines highlighted (as of Pygments 0.11).
  
  With the `full` option, a complete HTML 4 document is output, including
  the style definitions inside a ``<style>`` tag, or in a separate file if
  the `cssfile` option is given.
  
  When `tagsfile` is set to the path of a ctags index file, it is used to
  generate hyperlinks from names to their definition.  You must enable
  `lineanchors` and run ctags with the `-n` option for this to work.  The
  `python-ctags` module from PyPI must be installed to use this feature;
  otherwise a `RuntimeError` will be raised.
  
  The `get_style_defs(arg='')` method of a `HtmlFormatter` returns a string
  containing CSS rules for the CSS classes used by the formatter. The
  argument `arg` can be used to specify additional CSS selectors that
  are prepended to the classes. A call `fmter.get_style_defs('td .code')`
  would result in the following CSS classes:
  
  .. sourcecode:: css
  
      td .code .kw { font-weight: bold; color: #00FF00 }
      td .code .cm { color: #999999 }
      ...
  
  If you have Pygments 0.6 or higher, you can also pass a list or tuple to the
  `get_style_defs()` method to request multiple prefixes for the tokens:
  
  .. sourcecode:: python
  
      formatter.get_style_defs(['div.syntax pre', 'pre.syntax'])
  
  The output would then look like this:
  
  .. sourcecode:: css
  
      div.syntax pre .kw,
      pre.syntax .kw { font-weight: bold; color: #00FF00 }
      div.syntax pre .cm,
      pre.syntax .cm { color: #999999 }
      ...
  
  Additional options accepted:
  
  `nowrap`
      If set to ``True``, don't add a ``<pre>`` and a ``<div>`` tag
      around the tokens. This disables most other options (default: ``False``).
  
  `full`
      Tells the formatter to output a "full" document, i.e. a complete
      self-contained document (default: ``False``).
  
  `title`
      If `full` is true, the title that should be used to caption the
      document (default: ``''``).
  
  `style`
      The style to use, can be a string or a Style subclass (default:
      ``'default'``). This option has no effect if the `cssfile`
      and `noclobber_cssfile` option are given and the file specified in
      `cssfile` exists.
  
  `noclasses`
      If set to true, token ``<span>`` tags (as well as line number elements)
      will not use CSS classes, but inline styles. This is not recommended
      for larger pieces of code since it increases output size by quite a bit
      (default: ``False``).
  
  `classprefix`
      Since the token types use relatively short class names, they may clash
      with some of your own class names. In this case you can use the
      `classprefix` option to give a string to prepend to all Pygments-generated
      CSS class names for token types.
      Note that this option also affects the output of `get_style_defs()`.
  
  `cssclass`
      CSS class for the wrapping ``<div>`` tag (default: ``'highlight'``).
      If you set this option, the default selector for `get_style_defs()`
      will be this class.
  
      .. versionadded:: 0.9
         If you select the ``'table'`` line numbers, the wrapping table will
         have a CSS class of this string plus ``'table'``, the default is
         accordingly ``'highlighttable'``.
  
  `cssstyles`
      Inline CSS styles for the wrapping ``<div>`` tag (default: ``''``).
  
  `prestyles`
      Inline CSS styles for the ``<pre>`` tag (default: ``''``).
  
      .. versionadded:: 0.11
  
  `cssfile`
      If the `full` option is true and this option is given, it must be the
      name of an external file. If the filename does not include an absolute
      path, the file's path will be assumed to be relative to the main output
      file's path, if the latter can be found. The stylesheet is then written
      to this file instead of the HTML file.
  
      .. versionadded:: 0.6
  
  `noclobber_cssfile`
      If `cssfile` is given and the specified file exists, the css file will
      not be overwritten. This allows the use of the `full` option in
      combination with a user specified css file. Default is ``False``.
  
      .. versionadded:: 1.1
  
  `linenos`
      If set to ``'table'``, output line numbers as a table with two cells,
      one containing the line numbers, the other the whole code.  This is
      copy-and-paste-friendly, but may cause alignment problems with some
      browsers or fonts.  If set to ``'inline'``, the line numbers will be
      integrated in the ``<pre>`` tag that contains the code (that setting
      is *new in Pygments 0.8*).
  
      For compatibility with Pygments 0.7 and earlier, every true value
      except ``'inline'`` means the same as ``'table'`` (in particular, that
      means also ``True``).
  
      The default value is ``False``, which means no line numbers at all.
  
      **Note:** with the default ("table") line number mechanism, the line
      numbers and code can have different line heights in Internet Explorer
      unless you give the enclosing ``<pre>`` tags an explicit ``line-height``
      CSS property (you get the default line spacing with ``line-height:
      125%``).
  
  `hl_lines`
      Specify a list of lines to be highlighted. The line numbers are always
      relative to the input (i.e. the first line is line 1) and are
      independent of `linenostart`.
  
      .. versionadded:: 0.11
  
  `linenostart`
      The line number for the first line (default: ``1``).
  
  `linenostep`
      If set to a number n > 1, only every nth line number is printed.
  
  `linenospecial`
      If set to a number n > 0, every nth line number is given the CSS
      class ``"special"`` (default: ``0``).
  
  `nobackground`
      If set to ``True``, the formatter won't output the background color
      for the wrapping element (this automatically defaults to ``False``
      when there is no wrapping element [eg: no argument for the
      `get_syntax_defs` method given]) (default: ``False``).
  
      .. versionadded:: 0.6
  
  `lineseparator`
      This string is output between lines of code. It defaults to ``"\n"``,
      which is enough to break a line inside ``<pre>`` tags, but you can
      e.g. set it to ``"<br>"`` to get HTML line breaks.
  
      .. versionadded:: 0.7
  
  `lineanchors`
      If set to a nonempty string, e.g. ``foo``, the formatter will wrap each
      output line in an anchor tag with an ``id`` (and `name`) of ``foo-linenumber``.
      This allows easy linking to certain lines.
  
      .. versionadded:: 0.9
  
  `linespans`
      If set to a nonempty string, e.g. ``foo``, the formatter will wrap each
      output line in a span tag with an ``id`` of ``foo-linenumber``.
      This allows easy access to lines via javascript.
  
      .. versionadded:: 1.6
  
  `anchorlinenos`
      If set to `True`, will wrap line numbers in <a> tags. Used in
      combination with `linenos` and `lineanchors`.
  
  `tagsfile`
      If set to the path of a ctags file, wrap names in anchor tags that
      link to their definitions. `lineanchors` should be used, and the
      tags file should specify line numbers (see the `-n` option to ctags).
      The tags file is assumed to be encoded in UTF-8.
  
      .. versionadded:: 1.6
  
  `tagurlformat`
      A string formatting pattern used to generate links to ctags definitions.
      Available variables are `%(path)s`, `%(fname)s` and `%(fext)s`.
      Defaults to an empty string, resulting in just `#prefix-number` links.
  
      .. versionadded:: 1.6
  
  `filename`
      A string used to generate a filename when rendering ``<pre>`` blocks,
      for example if displaying source code. If `linenos` is set to
      ``'table'`` then the filename will be rendered in an initial row
      containing a single `<th>` which spans both columns.
  
      .. versionadded:: 2.1
  
  `wrapcode`
      Wrap the code inside ``<pre>`` blocks using ``<code>``, as recommended
      by the HTML5 specification.
  
      .. versionadded:: 2.4
  
  `debug_token_types`
      Add ``title`` attributes to all token ``<span>`` tags that show the
      name of the token.
  
      .. versionadded:: 2.10
  
  
  **Subclassing the HTML formatter**
  
  .. versionadded:: 0.7
  
  The HTML formatter is now built in a way that allows easy subclassing, thus
  customizing the output HTML code. The `format()` method calls
  `self._format_lines()` which returns a generator that yields tuples of ``(1,
  line)``, where the ``1`` indicates that the ``line`` is a line of the
  formatted source code.
  
  If the `nowrap` option is set, the generator is the iterated over and the
  resulting HTML is output.
  
  Otherwise, `format()` calls `self.wrap()`, which wraps the generator with
  other generators. These may add some HTML code to the one generated by
  `_format_lines()`, either by modifying the lines generated by the latter,
  then yielding them again with ``(1, line)``, and/or by yielding other HTML
  code before or after the lines, with ``(0, html)``. The distinction between
  source lines and other code makes it possible to wrap the generator multiple
  times.
  
  The default `wrap()` implementation adds a ``<div>`` and a ``<pre>`` tag.
  
  A custom `HtmlFormatter` subclass could look like this:
  
  .. sourcecode:: python
  
      class CodeHtmlFormatter(HtmlFormatter):
  
          def wrap(self, source, *, include_div):
              return self._wrap_code(source)
  
          def _wrap_code(self, source):
              yield 0, '<code>'
              for i, t in source:
                  if i == 1:
                      # it's a line of formatted code
                      t += '<br>'
                  yield i, t
              yield 0, '</code>'
  
  This results in wrapping the formatted lines with a ``<code>`` tag, where the
  source lines are broken using ``<br>`` tags.
  
  After calling `wrap()`, the `format()` method also adds the "line numbers"
  and/or "full document" wrappers if the respective options are set. Then, all
  HTML yielded by the wrapped generator is output.
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code: def get_token_style_defs(self, arg=None):
      prefix = self.get_css_prefix(arg)
  
      styles = [
          (level, ttype, cls, style)
          for cls, (style, ttype, level) in self.class2style.items()
          if cls and style
      ]
      styles.sort()
  
      lines = [
          "%s { %s } /* %s */" % (prefix(cls), style, repr(ttype)[6:])
          for (level, ttype, cls, style) in styles
      ]
  
      return lines
  
imports: import functools
  import os
  import sys
  import os.path
  from io import StringIO
  from pygments.formatter import Formatter
  from pygments.token import Token, Text, STANDARD_TYPES
  from pygments.util import get_bool_opt, get_int_opt, get_list_opt
label_desc: Use image node_id 7 for calling the HtmlFormatter obj's underlying member method code with example usage: obj.get_token_style_defs(arg) and returns: lines