code: def islist(node):
      return isinstance(node, ast.List)
  
file_path: catboost/contrib/python/pythran/pythran/optimizations/list_to_tuple.py
imports: from pythran.analyses import Aliases, FixedSizeList
  from pythran.tables import MODULES
  from pythran.passmanager import Transformation
  from pythran.utils import path_to_attr
  import gast
label_desc: Use image node_id 1 for calling a global function with example usage: islist(node) and returns: isinstance