PythonStudy——字符串重要方法 String important method

s1 = ‘123abc呵呵‘
print(s1.index(‘b‘))

s2 = ‘***好 * 的  ***‘
print(s2.strip(‘*‘))

s3 = ‘12312312‘
print(s3.count(‘123‘))

s4 = ‘123‘
print(s4.isdigit())

s5 = "AbC def"
print(s5.upper())  # 全大写
print(s5.lower())  # 全小写

print(s5.capitalize())  # 首字母大写
print(s5.title())  # 每个单词首字母大写

s6 = ‘https://www.baidu.com‘
r1 = s6.startswith(‘https:‘)
r2 = s6.startswith(‘http:‘)
r3 = s6.endswith(‘com‘)
r4 = s6.endswith(‘cn‘)
if (r1 or r2) and (r3 or r4):
    print(‘合法的链接‘)
else:
    print(‘不合法的链接‘)

s7 = ‘egon say: he is da shuai b，egon！egon！egon！‘
new_s7 = s7.replace(‘egon‘, ‘Liu某‘)  # 默认替换所有
print(new_s7)
new_s7 = s7.replace(‘egon‘, ‘Liu某‘, 1)  # 替换一次
print(new_s7)

s8 = ‘name：{}，age：{}‘
print(s8.format(‘Owen‘, 18))  # 默认按位置
print(‘name：{1}，age：{1}, height：{1}‘.format(‘Owen‘, 18))  # 标注位置，一个值可以多次利用
print(‘name：{n}，age：{a}, height：{a}‘.format(a=18, n="Zero"))  # 指名道姓