Python标准库--string模块

Python标准库--string模块
string中包含了处理⽂本的常量和模板
常量
print(string.whitespace)
print(string.ascii_lowercase)
print(string.ascii_uppercase)
print(string.ascii_letters)
print(string.digits)
print(string.hexdigits)
print(string.octdigits)
print(string.punctuation)
print(string.printable)
"""
abcdefghijklmnopqrstuvwxyz
ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ
0123456789
0123456789abcdefABCDEF
01234567
!"#$%&'()*+,-./:;<=>?@[\]^_`{|}~
0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ!"#$%&'()*+,-./:;<=>?@[\]^_`{|}~ """
# 第⼀个是⼏个空⾏,Windows输出有点问题
函数
capwords():每个单词⾸字母⼤写,可⾃定义单词间分隔符
s = 'This is a dog'
print(s)
print(string.capwords(s))
s2 = 'This-is-a-dog'
print(s2)
print(string.capwords(s2, '-'))
"""
This is a dog
This Is A Dog
This-is-a-dog
This-Is-A-Dog
"""
模板
substitute() 传⼊模板变量, 没有就报错
safe_substitute() 捕获异常,原样输出
values = {'var': 'boo'}
t = string.Template("""
Variable ：$var
Excape : $$
Variable in text: ${var}iable
""")
print(t.substitute(values))
t2 = string.Template("$var is here but $missing is not provided") try:
print(t2.substitute(values))
except KeyError as err:
print('ERROR:', str(err))
print(t2.safe_substitute(values))
"""
Variable ：boo
Excape : $
Variable in text: booiable
ERROR: 'missing'
boo is here but $missing is not provided
"""
$$ 输出 $
⾃定义模板类继承string中的模板类,可⾃定义变量定界符,和变量查找规则class MyTemplate(string.Template):
delimiter = '%'
idpattern = '[a-z]+_[a-z]+'
Formatter。