class_docstr: A GPU Graph Object (Base class of other graph types)
  
  Parameters
  ----------
  m_graph : cuGraph.MultiGraph object or None (default=None)
      Initialize the graph from a cugraph.MultiGraph object
  directed : boolean, optional (default=False)
      Indicated is the graph is directed.
  
  Examples
  --------
  >>> # undirected graph
  >>> G = cugraph.Graph()
  >>> # directed graph
  >>> G = cugraph.Graph(directed=True)
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docstr: Given a DataFrame containing external vertex ids in the identified
  columns, or a Series containing external vertex ids, return a
  Series with the internal vertex ids.
  Note that this function does not guarantee order in single GPU mode,
  and does not guarantee order or partitioning in multi-GPU mode.
  
  Parameters
  ----------
  df: cudf.DataFrame, cudf.Series, dask_cudf.DataFrame, dask_cudf.Series
      A DataFrame containing external vertex identifiers that will be
      converted into internal vertex identifiers.
  
  column_name: string, optional (default=None)
      Name of the column containing the external vertex ids
  
  Returns
  -------
  series : cudf.Series or dask_cudf.Series
      The internal vertex identifiers
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code: def lookup_internal_vertex_id(self, df, column_name=None):
      """
      Given a DataFrame containing external vertex ids in the identified
      columns, or a Series containing external vertex ids, return a
      Series with the internal vertex ids.
      Note that this function does not guarantee order in single GPU mode,
      and does not guarantee order or partitioning in multi-GPU mode.
  
      Parameters
      ----------
      df: cudf.DataFrame, cudf.Series, dask_cudf.DataFrame, dask_cudf.Series
          A DataFrame containing external vertex identifiers that will be
          converted into internal vertex identifiers.
  
      column_name: string, optional (default=None)
          Name of the column containing the external vertex ids
  
      Returns
      -------
      series : cudf.Series or dask_cudf.Series
          The internal vertex identifiers
      """
      return self.renumber_map.to_internal_vertex_id(df, column_name)
  
imports: import numpy
  from .graph_implementation import simpleGraphImpl, simpleDistributedGraphImpl, npartiteGraphImpl
  import cudf
  import dask_cudf
  from cugraph.utilities.utils import import_optional
label_desc: Use image node_id 12 for calling the Graph obj's underlying member method code with example usage: obj.lookup_internal_vertex_id(df, column_name) and returns: self