code: def fromPandas(cls, df):
          
          assert pd is not None
          if isinstance(df, pd.Series):
              df = pd.DataFrame(df)
          else:
              assert isinstance(df, pd.DataFrame)
          keys = [
              key if isinstance(key, tuple) else (key,)
              for key in df.index.tolist()
          ]
          index = [
              ('index{}'.format(i), cindex)
              for i, cindex in enumerate(zip(*keys))
          ]
          columns = [
              (str(cname), df[cname].tolist())
              for cname in df.columns.tolist()
          ]
          return cls(index=index, columns=columns)
docs: Create a :class:`~amplpy.DataFrame` from a pandas DataFrame.