class_docstr: misc unittest
docstr: len to padding unittest
code: def test_len_to_padding(self):
      """len to padding unittest"""
      with self.cached_session(use_gpu=False, force_gpu=False):
          padding = misc.len_to_padding(self.length, dtype=tf.int32)
          self.assertAllEqual(padding.eval(), 1 - self.mask_true)
  
file_path: delta/delta/utils/misc_test.py
imports: import numpy
  import delta.compat
  from delta.utils import misc
label_desc: Use image node_id 4 for calling the MiscTest obj's underlying member method code with example usage: obj.test_len_to_padding() without return types