class_docstr: Python AST visitor pass which finally lowers it to HalideIR
code: def visit_For(self, node):
      iter_var, low, ext, kind = self.visit(node.iter)
      _internal_assert(
          isinstance(node.target, ast.Name),
          "The loop iterator should be a variable!",
      )
  
      _name = node.target.id
  
      if isinstance(kind, tuple):
          low = self.analyzer.simplify(low)
          ext = self.analyzer.simplify(ext)
          _internal_assert(
              isinstance(low, _expr.ConstExpr)
              and isinstance(ext, _expr.ConstExpr),
              "Const range should start from a const "
              + "and iterate const times",
          )
  
          low, ext = low.value, ext.value
          if ext > 114514:
              logging.log(
                  logging.CRITICAL,
                  "[Warning] Are you sure to unroll a large loop in Python?",
              )
  
          bodies = []
          for i in range(low, low + ext):
              self.add_symbol(_name, Symbol.ConstLoopVar, i)
              body = visit_list_to_block(self.visit, node.body)
              body = self.wrap_up_realize(node, body)
              bodies.append(body)
              self.symbols.pop(_name)
          return concat_list_to_block(bodies)
  
      if iter_var is None:
          _internal_assert(
              kind is not None,
              "The loop iterating function parse error!",
          )
          if isinstance(ext, _expr.PrimExpr):
              dtype = ext.dtype
          elif isinstance(ext, int):
              dtype = "int32"
          else:
              raise NotImplementedError(
                  f"Unsupported type of ext: {type(ext)}"
              )
          offset = iter_var = tvm.te.var(_name, dtype=dtype)
          if not tvm.tir.analysis.expr_deep_equal(
              low, tvm.runtime.const(0, "int32")
          ):
              offset = iter_var + low
          self.add_symbol(_name, Symbol.LoopVar, offset)
          _body = visit_list_to_block(self.visit, node.body)
      else:
          _internal_assert(
              kind is None, "The loop bind function parse error!"
          )
          self.add_symbol(_name, Symbol.ThreadBind, iter_var)
          self.device += 1
          _body = visit_list_to_block(self.visit, node.body)
          self.device -= 1
  
      _body = self.wrap_up_realize(node, _body)
  
      if kind is None:
          res = _body
      else:
          _internal_assert(
              not isinstance(kind, tuple),
              "Micro expansion should be handled before!",
          )
          res = tvm.tir.For(
              iter_var, tvm.runtime.const(0, "int32"), ext, kind, _body
          )
  
      self.symbols.pop(_name)
      return res
  
imports: import ast
  import operator
  import logging
  import sys
  import numbers
  from enum import Enum
  from tvm.ir import Array, Range
  import tvm.runtime
  import tvm.tir
  import tvm.te
  import tvm.te._ffi_api
  import tvm.arith
  from tvm.tir import expr
  from tvm.tir import stmt
  from tvm.te.tensor import Tensor, Operation
  from tvm.tir import all
  from tvm.tir import any
  from .utils import _internal_assert
  from .None import calls
  from .None import utils
  from .preprocessor import determine_variable_usage
label_desc: Use image node_id 24 for calling the HybridParser obj's underlying member method code with example usage: obj.visit_For(node) and returns: res, concat_list_to_block