1 n1 = 5
2 r = n1.bit_length()
3 print(r)
1 a = "alex"
2 b = a.capitalize()
3 print(a)
4 print(b)
1 name = " aleX" #定义name变量
2 name = name.strip() #移除两边的空格
3 print(name)
4 p = name.startswith("al") #判断是否是以al开头的
5 print(p)
6 p_1 = name.endswith("X") #判断是否是以X结尾的
7 print(p_1)
8 x = name.maketrans("l","p") #定义一个替换的对应关系
9 name_1 = name.translate(x) #进行替换
10 print(name_1)
11 p_2 = name.split("l") #根据“l”进行分割
12 print(p_2)
13 p_3 = name.upper() #全部转换成大写
14 print(p_3)
15 p_4 = name.lower() #全部转换成小写
16 print(p_4)
17 print(name[1]) #输出第二个字符
18 print(name[0:3]) #输出前两个字符
19 print(name[2:4]) #输出后两个字符
20 #输出字符“e”所在的索引位置
21 count = 0
22 for r in name:
23 while r == "e":
24 print(count)
25 break
26 count+=1
27 print(name[0:-1]) #获取子序列,仅不包含最后一个字符
1 name = "beautiful"
2 for x in name:
3 print(x)
1 li = "alexericrain"
2 v = "_".join(li)
3 print(v)
1 content = input("请输入内容:")
2 v = content.split("+")
3 count = 0
4 for x in v:
5 x = x.strip()
6 n = int(x)
7 count = count + n
8 print(count)
1 content = input("请输入内容:")
2 a_num = 0
3 d_num = 0
4 for x in content:
5 if x.isalpha() == 1:
6 a_num+=1
7 elif x.isdecimal() == 1:
8 d_num+=1
9 print(a_num,d_num)
1 name = input("请输入名字:")
2 address = input("请输入地点:")
3 action = input("请输入爱好:")
4 print("敬爱可亲的%s,最喜欢在%s%s"%(name,address,action))
1 def check_code():
2 import random
3 checkcode = ""
4 for i in range(4):
5 current = random.randrange(0,4)
6 if current != i:
7 temp = chr(random.randint(65,90))
8 else:
9 temp = random.randint(0,9)
10 checkcode += str(temp)
11 return checkcode
12
13 while(1):
14 code = check_code()
15 print(code)
16 passwd = input("请输入验证码:")
17 # 把系统生成的验证码和用户输入的都转换成小写
18 # 或者大写后,则可以实现不区分大小写
19 code = code.lower()
20 passwd = passwd.lower()
21 if passwd == code:
22 print("验证码正确!")
23 break
1 topic = input("请输入:")
2 topic = topic.replace("苍老师","***",10000)
3 topic = topic.replace("东京热","***",10000)
4 print(topic)