Python文本常量和模板——string

#!/usr/bin/python#coding=utf-8#http://docs.python.org/library/string.htmlimport string#全部字母 abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZprint string.ascii_letters print string.letters #根據地區來的#全部小寫字母 abcdefghijklmnopqrstuvwxyzprint string.ascii_lowercaseprint string.lowercase#全部大寫字母 ABCDEFGHIJKLMNOPQRSTUVWXYZprint string.ascii_uppercaseprint string.uppercase#全部數字print string.digits#16進位? 0123456789abcdefABCDEFprint string.hexdigits#所有的空格 \t\n\x0b\x0c\r print string.whitespace#可列印字元(包括digits, letters, punctuation, and whitespace)print string.printable#標點符號print string.punctuation#不知道幹嘛的01234567print string.octdigits#字串格式化"{0} {1}".format("hello", "world")"{1} {0}".format("world", "hello")"{} {}".format("hello") #2.7 Only"{a} {b}".format(a= "hello",b ="world")#百分比，保留二位小數'Correct answers: {0:.2}'.format(1.00/3)'Correct answers: {0:.2%}'.format(1.00/3)import datetimed = datetime.datetime.now()'{0:%Y-%m-%d %H:%M:%S}'.format(d)#模板from string import Templates = Template('$a $b')s.substitute(a='hello', b='world')"hello".find("l") #2"hello".rfind("l") #3"hello".index("l") #2 如果沒找到會拋ValueError異常"hello".count("l") #2