code: def compile(self, X, verbose=False):
          
          for term in self._terms:
              term.compile(X, verbose=verbose)
  
          # now remove duplicate intercepts
          n_intercepts = 0
          for term in self._terms:
              if term.isintercept:
                  n_intercepts += 1
          return self
docs: method to validate and prepare data-dependent parameters
  
          Parameters
          ---------
          X : array-like
              Input dataset
  
          verbose : bool
              whether to show warnings
  
          Returns
          -------
          None