How to use _transform_helper method in pandera

Best Python code snippet using pandera_python

preprocessing.py

Source:preprocessing.py Github

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...93 if isinstance(col, (list,tuple)): raise ValueError("col must be None or a single column.")94 def fit(self,X,y=None,**params):95 return self96 def transform(self,X,y=None,**params):97 res = H2OColOp._transform_helper(X,params)98 if self.inplace: X[self.col] = res99 else: return X.cbind(res)100 return X101 def _transform_helper(self, X, **params):102 if self.params is None or self.params == {}:103 if self.col is not None: res = self.fun(X[self.col])104 else: res = self.fun(X)105 else:106 if self.col is not None: res = self.fun(X[self.col],**self.params)107 else: res = self.fun(X,**self.params)108 return res109 def to_rest(self, step_name):110 ast = self._transform_helper(self._dummy_frame())._ex._to_string()111 new_col_names = self.new_col_name112 if new_col_names is None: new_col_names=["|"]113 elif not isinstance(new_col_names, (list,tuple)): new_col_names = [new_col_names]114 return super(H2OColOp, self).to_rest([step_name,self.__class__.__name__,ast,self.inplace,"|".join(new_col_names)])115class H2OBinaryOp(H2OColOp):116 """Perform a binary operation on a column.117 If left is None, then the column will appear on the left in the operation; otherwise118 it will be appear on the right.119 A ValueError is raised if both left and right are None.120 """121 def __init__(self, op, col, inplace=True, new_col_name=None, left=None, right=None, **params):122 super(H2OBinaryOp, self).__init__(op,col,inplace, new_col_name, **params)123 self.left_is_col = isinstance(left, H2OCol)124 self.right_is_col = isinstance(right,H2OCol)125 self.left = left126 self.right = right127 if left is None and right is None:128 raise ValueError("left and right cannot both be None")129 def _transform_helper(self,X,**params):130 if self.left is None: return self.fun(X[self.col],X[self.right.col] if self.right_is_col else self.right)...

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