code: def available(compiler="catalyst") -> bool:
      """Check the availability of the given compiler package.
  
      Args:
          compiler (str): Name of the compiler package (default value is ``catalyst``)
  
      Returns:
          bool: ``True`` if the compiler package is installed on the system
  
      **Example**
  
      Before installing the ``pennylane-catalyst`` package:
  
      >>> qml.compiler.available("catalyst")
      False
  
      After installing the ``pennylane-catalyst`` package:
  
      >>> qml.compiler.available("catalyst")
      True
      """
  
      # It only refreshes the compilers names and entry points if
      # the name is not already stored.
  
      if compiler not in AvailableCompilers.names_entrypoints:
          # Reload installed packages and updates
          # the class variable names_entrypoints
          _reload_compilers()
  
      return compiler in AvailableCompilers.names_entrypoints
  
file_path: pennylane/pennylane/compiler/compiler.py
imports: from typing import List, Optional
  from sys import version_info
  from importlib import reload, metadata
  from collections import defaultdict
  import dataclasses
  import re
  from semantic_version import Version
label_desc: Use image node_id 5 for calling a global function with example usage: available(compiler) and returns: unknown