packages/vaex-core/vaex/dataframe.py
def add_column(self, name, f_or_array):
        """Add an in memory array as a column."""
        if isinstance(f_or_array, (np.ndarray, Column)):
            data = ar = f_or_array
            # it can be None when we have an 'empty' DataFrameArrays
            if self._length_original is None:
                self._length_unfiltered = _len(data)
                self._length_original = _len(data)
                self._index_end = self._length_unfiltered
            if _len(ar) != self.length_original():
                if self.filtered:
                    # give a better warning to avoid confusion
                    if len(self) == len(ar):
                        raise ValueError("Array is of length %s, while the length of the DataFrame is %s due to the filtering, the (unfiltered) length is %s." % (len(ar), len(self), self.length_unfiltered()))
                raise ValueError("array is of length %s, while the length of the DataFrame is %s" % (len(ar), self.length_original()))
            # assert self.length_unfiltered() == len(data), "columns should be of equal length, length should be %d, while it is %d" % ( self.length_unfiltered(), len(data))
            self.columns[name] = f_or_array
            if name not in self.column_names:
                self.column_names.append(name)
        else:
            raise ValueError("functions not yet implemented")
        self._save_assign_expression(name, Expression(self, name))
def add_column(self, name, f_or_array):
        if isinstance(f_or_array, (np.ndarray, Column)):
            data = ar = f_or_array
            # it can be None when we have an 'empty' DataFrameArrays
            if self._length_original is None:
                self._length_unfiltered = _len(data)
                self._length_original = _len(data)
                self._index_end = self._length_unfiltered
            if _len(ar) != self.length_original():
                if self.filtered:
                    # give a better warning to avoid confusion
                    if len(self) == len(ar):
                        raise ValueError("Array is of length %s, while the length of the DataFrame is %s due to the filtering, the (unfiltered) length is %s." % (len(ar), len(self), self.length_unfiltered()))
                raise ValueError("array is of length %s, while the length of the DataFrame is %s" % (len(ar), self.length_original()))
            # assert self.length_unfiltered() == len(data), "columns should be of equal length, length should be %d, while it is %d" % ( self.length_unfiltered(), len(data))
            self.columns[name] = f_or_array
            if name not in self.column_names:
                self.column_names.append(name)
        else:
            raise ValueError("functions not yet implemented")
        self._save_assign_expression(name, Expression(self, name))
def add_column ( self , name , f_or_array ) : if isinstance ( f_or_array , ( np . ndarray , Column ) ) : data = ar = f_or_array # it can be None when we have an 'empty' DataFrameArrays if self . _length_original is None : self . _length_unfiltered = _len ( data ) self . _length_original = _len ( data ) self . _index_end = self . _length_unfiltered if _len ( ar ) != self . length_original ( ) : if self . filtered : # give a better warning to avoid confusion if len ( self ) == len ( ar ) : raise ValueError ( "Array is of length %s, while the length of the DataFrame is %s due to the filtering, the (unfiltered) length is %s." % ( len ( ar ) , len ( self ) , self . length_unfiltered ( ) ) ) raise ValueError ( "array is of length %s, while the length of the DataFrame is %s" % ( len ( ar ) , self . length_original ( ) ) ) # assert self.length_unfiltered() == len(data), "columns should be of equal length, length should be %d, while it is %d" % ( self.length_unfiltered(), len(data)) self . columns [ name ] = f_or_array if name not in self . column_names : self . column_names . append ( name ) else : raise ValueError ( "functions not yet implemented" ) self . _save_assign_expression ( name , Expression ( self , name ) )
Add an in memory array as a column.
Add an in memory array as a column .