作业

作业问题源代码为：

name=" aleX"
str1=print(name.strip()) # 移除两边按空格

print(name.startswith("al"))#判断是否以“al"开头
print(name.endswith("X"))#判断是否以”X“结尾

str2=name.replace('l','p')#用l替换p
print(str2)#打印结果

print(name.split("l"))#用l将name分割

print(name.upper())#将name变量变为大写
print(name.lower())#将name变量变为小写

print(name[1])#打印第二个字符
print(name[0:3])#输出前三个字符
print(name[3:5])#输出最后两个字符

print(name.find('e'))#输出e所在的索引位置

s="oldboy"
print(s[0:-1]#获取子序列，去掉最后一个字符

得到的结果如下：

aleX
False
True
apeX
[' a', 'eX']
ALEX
alex
a
al
eX
3
oldbo

列表内置对象练习内容：

list1=['tank',18,'male',3.0,9]
print(list1[4])
print(list1[-2])

print(list1[1:5])#切片，顾头不顾尾
print(list1[1:5:2])

print(len(list1))

print('tank' in list1)
print('tank' not in list1)

list1.append("张全蛋")#在列表末尾追加
print(list1)

# print(list1.pop()) #(-1)删除 pop取
# print(list1.pop(0))
level=list1.pop()#取出列表中的值并赋值给level变量
print(level)

print(list1)

name=list1.remove('tank')#直接删除列表中的'tank',把none赋值给name
print(name)
print(list1)

# 循环
for line in list1:
    print(line)

字符串内置对象练习为

list1=['tank',18,'广东']
print(list1[2])
print(list1[-1])

str1='  my name is xxx,my age is 18   '
print(str1[3:7])
print(str1[3:10:2])
print('x' in str1)
print(len(str1))
print(str1)

print(str1.strip())# 去除左右两边的空格
str2='my name is xxx, my age is 18'
list2=str2.split(' ')
#for i in str2:
   # print(i,end='')# 此为自定义参数
str3 = 'my name is Tank'
print(str3.lower())
print(str3.upper())
print(str3.startswith("my"))#判断字符串首尾是否为对应的值
print(str3.startswith("MY"))
print(str3.endswith("Tank"))
str4='my name is {}, my age is {}'#位置
str4=str4.format('tank',18,111)
print(str4)
str5='my name is {0}, my age is {1}'#索引
str5=str4.format('tank',18,111)
print(str5)
str5='my name is {name}, my age is {age}'#直接指定
str5=str4.format(name='tank',age=18)
print(str5)


name='tank'
age="18"
print(':'.join([name,age]))

str6='old new'
str6=str6.replace("old","python")
print(str6)

str7='***my name is xxx, my age is 18'
print(str7.lstrip('**'))

str8='my name is xxx, my age is 18***'
print(str8.rstrip('**'))

ID=input("请输入ID")
print(ID)
print(type(ID))
print(ID.isdigit())#判断字符串是否为数字

第一节所学基本知识

print("hello world")
name='tank'
print(name)

name = input('input username')
pwd = input('input password')
print(name,pwd)
print(type(name),type(pwd))

#for循环
list1=[1,2,3,4,5]
for line in list1:
    print(line)
for line in range(1,10):
    print(line)

SCHOOL="ahpu"#(以大写字母规定的默认为常量）
number = 100  # int(100)整型
number2 = int(100)

sal = 15.0  # float(15.0)浮点型
sal2 = float(15.0)
name = 'zmm'#字符串类型
print('zmm' + 'ahpu')#两个字符串相连

list1 = ['张嫚嫚','zmm', 11, 1.0, ['ahpu', 100]]
print(list1[0])
print(list1[5][0])

dict1 = {'name': "tank", "age": 18}  # {name="tank", "age"=18}
print(dict1["name"])#键值对key,value


 #布尔类型
print(10 == 10)  # True
print(10 == 11)  # False

#默认布尔类型的值
if 0:
    print('111')

if None:
    print('111')

if []:
    print('111')