<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def copy_from(self, other):
 """Copy properties from another ChemicalEntity """

        # Need to copy all attributes, fields, relations
        self.__attributes__ = {k: v.copy() for k, v in other.__attributes__.items()}
        self.__fields__ = {k: v.copy() for k, v in other.__fields__.items()}
        self.__relations__ = {k: v.copy() for k, v in other.__relations__.items()}
        self.maps = {k: m.copy() for k, m in other.maps.items()}
        self.dimensions = other.dimensions.copy()