code: def test_unesc():
      assert unesc("# comment", "python") == "comment"
      assert unesc("#comment", "python") == "comment"
      assert unesc("comment", "python") == "comment"
  
imports: import pytest
  from nbformat.v4.nbbase import new_code_cell, new_notebook
  import jupytext
  from jupytext.compare import compare, compare_notebooks, notebook_model
  from jupytext.magics import _PYTHON_MAGIC_ASSIGN, comment_magic, is_magic, uncomment_magic, unesc
label_desc: Use image node_id 1 for calling a global function with example usage: test_unesc() without return types