code: def groupby_code(index, dropna=True):
      if has_dropna():
          return ".groupby(['{index}'], dropna={dropna})".format(
              index="','".join(index), dropna=dropna
          )
      return ".groupby(['{index}'])".format(index="','".join(index))
  
file_path: dtale/dtale/pandas_util.py
imports: import pandas
  from logging import getLogger
  from pkg_resources import parse_version
label_desc: Use image node_id 4 for calling a global function with example usage: groupby_code(index, dropna) and returns: str, str