code: def test_limit_column_characters_different_positions_different_separator(
      dataframe,
  ):
      df = dataframe
      df.columns = ["first", "first", "second", "second", "first"]
      df.limit_column_characters(3, ".")
  
      assert df.columns[0] == "fir"
      assert df.columns[1] == "fir.1"
      assert df.columns[2] == "sec"
      assert df.columns[3] == "sec.1"
      assert df.columns[4] == "fir.2"
  
imports: import pytest
label_desc: Use image node_id 3 for calling a global function with example usage: test_limit_column_characters_different_positions_different_separator(dataframe) without return types