code: def escape_latex(s):
      r
  
      if isinstance(s, NoEscape):
          return s
  
      return NoEscape(''.join(_latex_special_chars.get(c, c) for c in str(s)))
docs: r"""Escape characters that are special in latex.
  
      Args
      ----
      s : `str`, `NoEscape` or anything that can be converted to string
          The string to be escaped. If this is not a string, it will be converted
          to a string using `str`. If it is a `NoEscape` string, it will pass
          through unchanged.
  
      Returns
      -------
      NoEscape
          The string, with special characters in latex escaped.
  
      Examples
      --------
      >>> escape_latex("Total cost: $30,000")
      'Total cost: \$30,000'
      >>> escape_latex("Issue #5 occurs in 30% of all cases")
      'Issue \#5 occurs in 30\% of all cases'
      >>> print(escape_latex("Total cost: $30,000"))
  
      References
      ----------
          * http://tex.stackexchange.com/a/34586/43228
          * http://stackoverflow.com/a/16264094/2570866