code: def timestamps(self, col: str, **kwargs):
          
          Add a timestamps column from a date column
  
          :param col: name of the timestamps column to add
          :type col: str
          :param \*\*kwargs: keyword arguments for ``pd.to_datetime`` 
                                                                                                                                                                                                                                                                                                                                          for date conversions
          :type \*\*kwargs: optional
  
          :example: ``ds.timestamps("mycol")``
          """
          try:
              name = "Timestamps"
              if "name" in kwargs:
                  name = kwargs["name"]
              if "errors" not in kwargs:
                  kwargs["errors"] = "coerce"
              if "unit" in kwargs:
                  kwargs["unit"] = "ms"
              try:
                  self.df[col] = pd.to_datetime(self.df[col], **kwargs)
              except TypeError:
                  pass
              ts = []
              for el in self.df[col]:
                  ts.append(arrow.get(el).timestamp)
              self.df[name] = ts
          except Exception as e:
              self.err(e, "Can not convert to timestamps")
docs: Add a timestamps column from a date column
  
          :param col: name of the timestamps column to add
          :type col: str
          :param \*\*kwargs: keyword arguments for ``pd.to_datetime`` 
                                                                                                                                                                                                                                                                                                                                          for date conversions
          :type \*\*kwargs: optional
  
          :example: ``ds.timestamps("mycol")``