Python Day02

课堂代码

list(['张三','李四','王五','赵六'])
students=['张三','李四','王五','赵六']
print(students[1])

studentsl=['张三','李四','王五','赵六',['qq','ww','ee']]
print(studentsl[4][1])
#取ww取李四

print('张三'not in studentsl)#False
studentsl.append('YY')#追加YY在末尾

del studentsl[2]#删除索引2的值
print(studentsl)
studentsl.remove('YY')#删除YY
studentsl.insert(3,'五大lao')#引索3的地方插入五大lao

#int float str# tuple值修改后id一定不一样(不可变)
#list dict#（可变）

tuple1=(1,2,3,'t','d')
for line in tuple1:
    print(line)

num=100
print(id(num))
num = 1002
print(id(num))

list1=[1,2,3]
list2=list1
list1.append(4)

print(id(list1))
print(id(list2))
print(list1)
print(list2)


dict2={'age':18,'name':'tank'}
print(dict2)
print(type(dict2))

print(type(dict2))
print(dict2['age'])
print('name'in dict2)

#del dict2['name']

print(dict2.values())
print(dict2.items())

for key in dict2:#靠缩进控制循环
    print(key)
    print(dict2[key])#循环取key

print(dict2.get('sex','male'))

x=10
y=20
z=30

if x>y:
    print(x)
elif z>y:
    print(z)
else:
    print(y)

str1 = 'tank'
while True:
    name=input('猜测').strip()
    if name == 'tank':
        print('nb')
        break
    print('try again')

str1 = 'tank'
num=0
while num<3:
    name = input('猜测').strip()
    if name == 'tank':
        print('nb')
        break
    print('try again')
    num += 1

 

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