class_docstr: A class that represent a notebook cell as a Python or Julia script
class_docstr_tok: ["A","class","that","represent","a","notebook","cell","as","a","Python","or","Julia","script"]
docstr: Does the python representation of this cell requires an explicit
  start of cell marker?
code: def explicit_start_marker(self, source):
      """Does the python representation of this cell requires an explicit
      start of cell marker?"""
      if not self.use_cell_markers:
          return False
      if self.metadata:
          return True
      if self.cell_marker_start:
          start_code_re = re.compile(
              "^"
              + self.comment
              + r"\s*"
              + self.cell_marker_start
              + r"\s*(.*)$"
          )
          end_code_re = re.compile(
              "^"
              + self.comment
              + r"\s*"
              + self.cell_marker_end
              + r"\s*$"
          )
          if start_code_re.match(source[0]) or end_code_re.match(
              source[0]
          ):
              return False
  
      if all([line.startswith(self.comment) for line in self.source]):
          return True
      if LightScriptCellReader(self.fmt).read(source)[1] < len(source):
          return True
  
      return False
  
imports: import re
  import warnings
  from copy import copy
  from .cell_metadata import _IGNORE_CELL_METADATA, is_active, metadata_to_double_percent_options, metadata_to_rmd_options, metadata_to_text
  from .cell_reader import LightScriptCellReader, MarkdownCellReader, RMarkdownCellReader
  from .doxygen import markdown_to_doxygen
  from .languages import _SCRIPT_EXTENSIONS, cell_language, comment_lines, same_language
  from .magics import comment_magic, escape_code_start, need_explicit_marker
  from .metadata_filter import filter_metadata
  from .pep8 import pep8_lines_between_cells
label_desc: Use image node_id 4 for calling the LightScriptCellExporter obj's underlying member method code with example usage: obj.explicit_start_marker(source) and returns: False, False, True, True, True, False