Python字符串练习

#1.执行Python的两种方式
    # python
    # python 1.py

#2.简叙位，字节的关系
    # 8位1字节

#3.ascii,unicode ,utf-8,gbk的关系
    # ascii
    # unicode
    # utf-8
# 4."李姐" 用utf-8和gbk编码所占的位数
    # utf-8:6
    # gbk:4
# 5.Python单行注释和多行注释
    #  #
    #  '''
    #
    #  '''
# 6.n = 5 该变量最少用多少个二进制位表示
    # n = 5
    # print(n.bit_length())
    # 3个
# 7.布尔值分别有什么
    # True
    # False
# 8.阅读代码,写出执行结果
    # a = "alex"
    # b = a.capitalize()
    # print(a)
    # print(b)
    # a == alex
    # b == Alex
# 9.name 完成以下功能
name = " sdxxxXfXAXA  "
#去除前后空格
v1 = name.strip()
print(v1)
#检查开始于结尾
v2 = v1.startswith("sd")
print(v2)
v3 = v1.endswith("AA")
print(v3)
#字符串替换
v4_1 = v1.replace("xXf","RRR")
#对应字符串替换
v4_2 = v1.maketrans("xXf","RRR")
v4_3 = v1.translate(v4_2)
print(v4_1)
print(v4_3)
#分割字符串
v5_1 = v1.split("X")
v5_2 = v1.partition("X")
print(v5_1)
print(v5_2)
#迭代循环字符串
n = 0
while n < len(v1):
    print(n,v1[n],"\t",end="")
    n+=1
print()
#用下划线连接字符串中的每一个元素
l = "_"
v6 = l.join(v1)
print(v6)
#用户输入 实现简单计算
# n1 = int(input("输入第一个数字："))
# n2 = int(input("输入第二个字符串:"))
# n3 = n1+n2
# print(n1,"+",n2,n3)

# s1 = input("请输入一个整数加法：")
s1 = "1+6+7+5+9+4+2+7+9+4+9+4+65+454+818"
print(s1,end="")
sr = s1.split("+")
result = 0
count = 0
while result <len(sr):
    count += int(sr[result])
    result+=1
print("=",count)
#计算字符串中数字的个数
string = "2134Df犯得上"
count1,int1,str1 = 0,0,0
while count1 < len(string):
    if string[count1].isnumeric() == True:
        int1 += 1
    count1+=1
str1 = len(string)-int1
print(string,"\n数字：",int1,"\t字母和汉字：",str1)

运行结果