standard_errors.py 文件源码

def precalculate_factors(self, df):
    """Initializes the labels for the Bootstrap object.

    Args:
      df: A pandas dataframe.
    """

    if self._unit is not None:
      self._values, labels = pd.factorize(df[self._unit])
      self._labels = [self._values == ii for ii in range(len(labels))]