1 test = "12"

1 v1 = test.isdecimal()
2 v2 = test.isdigit()
3 v3 = test.isnumeric()
4 print(v1, v2)

True True

1 import keyword
2 print(keyword.iskeyword("def"))
3 test = "def"
4 v = test.isidentifier()
5 print(v)

True
True

1 # \t  制表符
2 # \n  换行符
3 test = "ddfer\thuyb"
4 v = test.isprintable()
5 print(v)

False

1 test = " "
2 v = test.isspace()
3 print(v)

True

1 test = "Adsjdjksdskd jdfksdslkdj"
2 v1 = test.istitle()
3 print(v1)
4 v = test.title()
5 print(v)
6 v2 = test.istitle()
7 print(v2)

False
Adsjdjksdskd Jdfksdslkdj
False

1 test = "你是风儿我是沙"
2 print(test)
3 t = ‘ ‘
4 v = t.join(test)
5 v1 = ‘_‘.join(test)
6 print(v)
7 print(v1)

你是风儿我是沙
你 是 风 儿 我 是 沙
你_是_风_儿_我_是_沙

1 test = "feng"
2 v = test.ljust(20,"*")
3 v1 = test.rjust(20,"*")
4 v2 = test.zfill(20)
5 print(v)
6 print(v1)
7 print(v2)

feng****************
****************feng
0000000000000000feng

1 test = "Feng"
2 v1 = test.islower()
3 v2 = test.lower()
4 print(v1,v2)
5 v3 = test.isupper()
6 v4 = test.upper()
7 print(v3,v4)

False feng
False FENG

1 test = " \nfeng "
2 v = test.lstrip()
3 v1 = test.rstrip()
4 v2 = test.strip()
5 print(v,v1,v2)

feng   
feng feng

1 v = "saevdds;gfuiuyv;sdiujsd"
2 m = str.maketrans("aeiou", "12345")
3 new_v = v.translate(m)
4 print(new_v)

s12vdds;gf535yv;sd35jsd

1 test = "testuufuskjksdkd"
2 v = test.partition(‘s‘) # 最多分割成三分
3 v1 = test.rpartition(‘s‘)
4 v2 = test.split(‘s‘,2)
5 v3 = test.rsplit(‘s‘,3)
6 print(v, v1, v2, v3)

(‘te‘, ‘s‘, ‘tuufuskjksdkd‘) (‘testuufuskjk‘, ‘s‘, ‘dkd‘) [‘te‘, ‘tuufu‘, ‘kjksdkd‘] [‘te‘, ‘tuufu‘, ‘kjk‘, ‘dkd‘]

1 test1 = "wdsdsfd\nsdfdfg\ncadewefq\nsd"
2 v4 = test1.splitlines(True)
3 print(v4)

[‘wdsdsfd\n‘, ‘sdfdfg\n‘, ‘cadewefq\n‘, ‘sd‘]

1 test = "backend 1.1.1.1"
2 v = test.startswith("a")
3 print(v)
4 v1 = test.endswith(‘a‘)
5 print(v1)

False
False

1 test = "feng"
2 v = test.swapcase()
3 print(v)

FENG