我正在通过Udacity和Dave Evans介绍了关于列表属性的练习
list1 = [1,2,3,4]
list2 = [1,2,3,4]
list1=list1+[6]
print(list1)
list2.append(6)
print(list2)
list1 = [1,2,3,4]
list2 = [1,2,3,4]
def proc(mylist):
mylist = mylist + [6]
def proc2(mylist):
mylist.append(6)
# Can you explain the results given by the four print statements below? Remove
# the hashes # and run the code to check.
print (list1)
proc(list1)
print (list1)
print (list2)
proc2(list2)
print (list2)
输出是
[1, 2, 3, 4, 6]
[1, 2, 3, 4, 6]
[1, 2, 3, 4]
[1, 2, 3, …