code: def _join_unicode(lines, sep=""):
      try:
          return sep.join(lines)
      except UnicodeDecodeError:
          sep = compat.text_type(sep)
          return sep.join(
              [
                  x.decode("utf-8") if isinstance(x, str) else x
                  for x in lines
              ]
          )
  
file_path: catboost/contrib/python/pandas/py2/pandas/io/formats/printing.py
imports: import sys
  from pandas.compat import u
  from pandas.core.dtypes.inference import is_sequence
  from pandas import compat
  from pandas.core.config import get_option
label_desc: Use image node_id 3 for calling a global function with example usage: _join_unicode(lines, sep) and returns: sep, sep