单引号表示string

spam = "That is Alice's cat."
print(spam)

双引号表示string

spam = "say hi to Bob's mother"
print (spam)

原始的string（Raw String）

print(r"That is Alice\'s cat")

三括号表示的string

print('''
hi alice
How are you?''')

得到大写形式

spam = spam.upper()

得到小写形式

spam = spam.lower()

print("How are you?")
feeling = input()
if feeling.lower() == 'great':
    print('I feel great too.')
else:
    print('I hope the rest of your days are good!')

isX

spam.islower()
spam.isupper()
spam.isalpha()
spam.isalnum()
spam.isdecimal() # only numerical strings
spam.isspace()
spam.istitle()

以某个字符创开始或者结尾

spam.startswith('df')
spam.endswidth('df')

连接字符串

','.join(['a', 'b', 'c'])

拆分字符

'My name is Simon'.split()
spam.split('\n')

对其和居中

'hello'.rjust(10, '*')
'hello'.ljust(10, '*')
'hello'.center(10, '=')

去除收尾特定的字符

'hello'.lstrip()
'hello'.lstrip()
'hello'.strip(' abc ')