input: 
  from typing import List
  
  def detect_iteration_error(func_code: str) -> str:
      """ Analyze the given Python function code to detect if it attempts to modify a list
      while iterating over it. If such an error is detected, return the fixed code with a
      copy of the list made before the iteration.
      >>> detect_iteration_error("def expand_list(list):\n    for item in list:\n        list *= 2")
      "def expand_list(list):\n    list_copy = list[:]\n    for item in list_copy:\n        list *= 2"
      """
  
output:     import ast
  
      class IterationErrorDetector(ast.NodeVisitor):
          def __init__(self):
              self.has_error = False
              self.list_name = None
  
          def visit_For(self, node):
              if isinstance(node.iter, ast.Name) and isinstance(node.target, ast.Name):
                  self.list_name = node.iter.id
                  for stmt in node.body:
                      if isinstance(stmt, ast.Expr) and isinstance(stmt.value, ast.BinOp):
                          if isinstance(stmt.value.left, ast.Name) and stmt.value.left.id == self.list_name:
                              self.has_error = True
                              break
              self.generic_visit(node)
  
      tree = ast.parse(func_code)
      detector = IterationErrorDetector()
      detector.visit(tree)
  
      if detector.has_error:
          lines = func_code.split('\n')
          for_line_index = None
          for i, line in enumerate(lines):
              if 'for' in line and detector.list_name in line:
                  for_line_index = i
                  break
          if for_line_index is not None:
              lines.insert(for_line_index, f'    {detector.list_name}_copy = {detector.list_name}[:]')
              for i in range(for_line_index, len(lines)):
                  lines[i] = lines[i].replace(detector.list_name, f'{detector.list_name}_copy')
          return '\n'.join(lines)
      return func_code