>>>a = "asdjkljaskdjlkasd"
>>>a
'asdjkljaskdjlkasd'
>>>a.capitailize
'Asdjkljaskdjlkasd'
>>>a = “湖人总冠军”
>>>a
'湖人总冠军'
>>>a.center(30,'*')
'************湖人总冠军*************'
>>>b = "abcdrfghijklmn"
>>>b
'abcdefghjiklmn'
>>>b.rjust(20)
' abcdefghijklmn'
>>> b.rjust(20,'-')
'------abcdefghijklmn'
>>>b.rjust(30,'*')
'****************abcdefghijklmn'
>>>b = "abcdrfghijklmn"
>>>b
'abcdefghjiklmn'
>>>b.ljust(20)
'abcdefghijklmn '
>>> b.ljust(20,'-')
'abcdefghijklmn------'
>>>b.ljust(30,'*')
'abcdefghijklmn****************'
1
>>> b = "aabbbbbccsdajkaklsdkkasdgn"
>>> b
'aabbbbbccsdajkaklsdkkasdgn'
>>> b.count(a)
0
>>> b.count('a')
5
>>> b.count('b')
5
>>> b.count('s')
3
>>> b.count('aa')
1
>>> b.count('jk')
1
2
>>> b = "abc,bcd,abc,asd,abc "
>>> b
'abc,bcd,abc,asd,abc '
>>> b.count('abc')
3
>>>
>>> a = "abcdefhijklmn"
>>> a
'abcdefhijklmn'
>>> a.endswith('n')
True
>>> a.endswith('m')
False
>>> a = "abcdefhijklmn"
>>> a
'abcdefhijklmn'
>>> a.startswith('m')
False
>>> a.startswith('a')
True
>>> a = "abcdefhijklmn"
>>> a
'abcdefhijklmn'
>>> a.index('a')
0
>>> a.index('m')
11
>>> a.index('j')
8
>>> a.index('e')
4
>>> a = "asdhbknlqwieoohzlmhuhqwegjghsgjhasda"
>>> a
'asdhbknlqwieoohzlmhuhqwegjghsgjhasda'
>>> a.rindex('i')
10
>>> a.rindex('a')
35
>>> a.rindex('d')
34
>>> a.rindex('s')
33
>>> a.rindex('h')
31
>>> a = "asdhbknlqwieoohzlmhuhqwegjghsgjhasda"
>>> a
'asdhbknlqwieoohzlmhuhqwegjghsgjhasda'
>>> a.find('i')
10
>>> a.find('u')
19
>>> a.find('c')
-1
>>> a.find('x')
-1
>>> a.find('d')
2
>>>
>>> a = "asdhbknlqwieoohzlmhuhqwegjghsgjhasda"
>>> a
'asdhbknlqwieoohzlmhuhqwegjghsgjhasda'
>>> a.rfind('i')
10
>>> a.rfind('x')
-1
>>> a.rfind('asdhbknlqwieoohzlmhuhqwegjghsgjhasda')
0
>>> a.rfind('v')
-1
>>> a.rfind('s')
33
>>> s = "中国"
>>> s
'中国'
>>> s.encode()
b'\xe4\xb8\xad\xe5\x9b\xbd'
>>> "{} {}".format("hello", "world")
'hello world'
>>> "{0} {1}".format("hello", "world")
'hello world'
>>> "{1} {0} {1}".format("hello", "world")
'world hello world'
>>>
(1.通过关键字.
print('{name}在{option}'.format(name="中国",option="维护和平"))
输出为:中国在维护和平
(2.通过位置.
print('name={} path={}'.format('11111', '/')
输出为:name=11111 path = /
print('{0}在{1}在{2}'.format('向某','写代码','房间'))
输出为:向某在写代码在房间
(3.填充和对齐
print('{:^30}'.format("111111")) # 居中
print('{:>30}'.format("222222")) # 右对齐
print('{:<30}'.format("333333")) # 左对齐
30:字段长度(最左到最右之间的长度)
print('{:.3f}'.format(3.1415926))
输出结果为:3.14(四舍五入且保留三位小数)
print('{:.5f}'.format(3.14))
输出结果为:3.14000(保留五位小数,不够的用零补齐)
print('{:b}'.format(100))二进制
print('{:o}'.format(100))八进制
print('{:d}'.format(100))十进制
print('{:x}'.format(100))十六进制
>>> a = "asdakalsdkjcc"
>>> a
'asdakalsdkjcc'
>>> a.islower()
True
>>> b = "AsSDFsadojqwd"
>>> b
'AsSDFsadojqwd'
>>> b.islower()
False
>>> A = "SKKJXHAKS"
>>> A
'SKKJXHAKS'
>>> A.isupper()
True
>>> B = "AASDasdakjasd"
>>> B
'AASDasdakjasd'
>>> B.isupper()
False
>>> a = "Hello world"
>>> a
'Hello world'
>>> a.istitle()
False
>>> b = "Hello World"
>>> b
'Hello World'
>>> b.istitle()
True
>>> a = "a s sdsad dfa "
>>> a
'a s sdsad dfa '
>>> a.isspace()
False
>>>
>>> b = " "
>>> b
' '
>>> b.isspace()
True
>>> a = "1adhhihwdhui2uhi97asdjioqwjei42343129048"
>>> a
'1adhhihwdhui2uhi97asdjioqwjei42343129048'
>>> a.isdigit()
False
>>> b = "1289712739864"
>>> b
'1289712739864'
>>> b.isdigit()
True
>>> a = "12jjhuihihi"
>>> a
'12jjhuihihi'
>>> a.isalnum()
True
>>> a = "12jjhuihihi"
>>> a
'12jjhuihihi'
>>> a.isalpha()
False
>>> b = "hjashduiihhbbqwuiudiewq"
>>> b
'hjashduiihhbbqwuiudiewq'
>>> b.isalpha()
True
>>> a = "hello world word"
>>> a
'hello world word'
>>> a.title()
'Hello World Word'
>>> a = "HELLO WORLD WORD"
>>> a
'HELLO WORLD WORD'
>>> a.lower()
'hello world word'
>>> a = "hello world word"
>>> a
'hello world word'
>>> a.upper()
'HELLO WORLD WORD'
>>> a = "asdajkashdjhhjw"
>>> a
'asdajkashdjhhjw'
>>> a.split("asda,jkashd")
['asdajkashdjhhjw']
>>> a.split("asda")
['', 'jkashdjhhjw']
>>> a.split("asda,j,k,a,s,h,d")
['asdajkashdjhhjw']
>>> a.split("asda,j,k,")
['asdajkashdjhhjw']
>>> a.split("asda,j,k,")
>>> a = "sd"
>>> a
'sd'
>>> a.join(['cdf'])
'cdf'
>>> a
'sd'
>>> a.join(['cdf','a','bc'])
'cdfsdasdbc'
>>> a
'sd'
>>> a = " asd "
>>> a
' asd '
>>> a.strip()
'asd'
>>> a = " asd "
>>> a
' asd '
>>> a.lstrip()
'asd '
>>> a = " asd "
>>> a
' asd '
>>> a.rstrip()
' asd'
>>> a.replace('aaaaa','a')
'asd'
>>> a.replace('aaaaa','asd')
'asd'
>>> a.replace('asd','aaaaaaaaaaaa')
'aaaaaaaaaaaa'
>>> a.replace('asd','aaaaaaaaaaaa')