How Python implements a PHP-like reference assignment

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1 # ############################2 #change the value of a variable, and the value of the variable that is related to it also changes equally3 #php-like reference assignment, macro view4 # ############################5 6Relation = []#relation is a list of the collections that are loaded in the relationship7 8 9 #bind a variable that has a relationshipTen defBind (*Arg): One     ifLen (ARG) < 2: A         " " - determine the number of bound variables -         " " the         Print("error: Bind at least two variables") - exit () -     Globalrelation -      forIinchARG: +         " " - checks if the bound variable exists +         " " A         ifI not inchglobals (). Keys (): at             Print("Error: Variable%s does not exist"%(i)) - exit () -  -     #for loading -Flag =Set (ARG) -     ifLen (relation): ini =0 -          whileI <Len (relation): to             ifLen (relation[i) &flag): +Relation[i] = Relation[i] |Flag -                  Break thei + = 1 *         ifi = =Len (relation): $ relation.append (flag)Panax Notoginseng     Else: - relation.append (flag) the  +     #parameter, the value of the remaining variable is equal to the value of the first variable argument Aindex = 1 the      whileIndex <Len (ARG): +Globals () [arg[index]] =globals () [arg[0]] -Index + = 1 $  $  - #assigning values to variables - defassign (Var, value): the     Globalrelation -     ifLen (relation):Wuyii =0 the          whileI <Len (relation): -             ifVarinchRelation[i]: Wu                  forIteminchRelation[i]: -Globals () [Item] =value About                  Break $i + = 1 -         ifi = =Len (relation): -             Print('Error: The assigned variable is not yet bound') - exit () A     Else: +         Print("Error: No related collection currently exists") the exit () -  $  theA ='Sky' theb =' Land' theBind'a','b')#binding has a relational variable the Print(relation)#print a list of currently-related collections [{' A ', ' B '}] - Print(A, B)#values for output variables A and B sky Sky inAssign'a','Sea')#change the value of a variable the Print(A, B)#values for output variables A and B sea sea

How Python implements a PHP-like reference assignment