python array append
my_list = ['a','b']  
my_list.append('c') 
print(my_list)      # ['a','b','c']
other_list = [1,2] 
my_list.append(other_list) 
print(my_list)      # ['a','b','c',[1,2]]
my_list.extend(other_list) 
print(my_list)      # ['a','b','c',[1,2],1,2]