code: def test_read_nbconvert_script(
      script="""
  # coding: utf-8
  
  # A markdown cell
  
  # In[1]:
  
  
  import pandas as pd
  
  pd.options.display.max_rows = 6
  pd.options.display.max_columns = 20
  
  
  # Another markdown cell
  
  # In[2]:
  
  
  1 + 1
  
  
  # Again, a markdown cell
  
  # In[33]:
  
  
  2 + 2
  
  
  # <codecell>
  
  
  3 + 3
  """,
  ):
      assert (
          jupytext.formats.guess_format(script, ".py")[0] == "percent"
      )
      nb = jupytext.reads(script, ".py")
      assert len(nb.cells) == 5
  
imports: import os
  import pytest
  from nbformat.v4.nbbase import new_code_cell, new_markdown_cell, new_notebook, new_raw_cell
  import jupytext
  from jupytext.compare import compare, compare_notebooks, notebook_model
label_desc: Use image node_id 3 for calling a global function with example usage: test_read_nbconvert_script(script) without return types