lst=input("请输入列表:")
list1=[]
for i in lst:
if i != ',' and i != ',':
#print(i)
list1.append(i)
#print(type(i))
print(type(list1))
print(list1)
a=list1.sort()
print(list1.sort())
sort的结果是none,是什么原因导致的
lst=input("请输入列表:")
list1=[]
for i in lst:
if i != ',' and i != ',':
#print(i)
list1.append(i)
#print(type(i))
print(type(list1))
print(list1)
a=list1.sort()
print(list1.sort())
sort的结果是none,是什么原因导致的