Python 字符串系统函数用法

#author F

name = "linux is an \toperation diff with windows {test}"

print(name.capitalize())  #Linux...
print(name.count("i"))  #6
print(name.center(50, "-"))  #-----linux is an operation diff with windows------
print(name.encode("utf-8"))  #转为二进制
print(name.endswith("ows"))  #是否以ows结尾
print(name.expandtabs(tabsize=30))  #tab键在输出是用30个空格
print(name.find("is"))  #查找
print(name[name.find("is"):])  #字符串切片
print(name.format(test="ttttt"))  #linux is an     operation diff with windows ttttt
print(name.format_map({'test': 'coooooooooool'}))  #linux is an     operation diff with windows coooooooooool
print(name.index('nu'))  #2
print(name.isalnum())  #是否是阿拉巴数字字符(英文+数字)
print(name.isalpha())  #是否是纯英文字符
print(name.isdecimal())  #是否是十进制
print(name.isdigit())  #是否是整数
print('a1'.isidentifier())  #是否是合法的变量名
print(name.isnumeric())  #是否是数字
print(name.isspace())  #是否是空格
print(name.istitle())  #是否是标题 (判断每个单次首字母是不是大写)
print(name.isprintable())  #是否可打印 tty file drive file
print(name.isupper())  #是否是大写
#print('--'.join([1, 2, 3, 4]))  #join只能join字符串
print('--'.join(['1', '2', '3', '4']))  #join只能join字符串 1--2--3--4
print(name.ljust(50, "&"))  #linux is an     operation diff with windows {test}&&&
print(name.rjust(50, "^"))  #^^^linux is an     operation diff with windows {test}
print("SDFH".lower())  #sdfh
print("asda".upper())  #ASDA
print("\nlinux\n".lstrip())  #去掉左边的空格或者回车
print("\nlinux\n".rstrip())  #去掉右边的空格或者回车
print("\nlinux\n".lstrip())  #去掉两边的空格或者回车
p = str.maketrans("abcdef", "123456")  #对应数据要一样多
print("aledd ll".translate(p))  #1l544 ll
print("alibaba li".replace("i", "888"))  #al888baba l888
print("alibaba li".replace("i", "888", 1))  #al888baba li
print("alibaba li".rfind("a"))  #6  找出最右边的a
print("al+jj+hg+bg+dd".split('+'))  #['al', 'jj', 'hg', 'bg', 'dd']
print("al+jj+h\ng+bg+dd".splitlines())  #按照换行分割 识别不同系统的换行
print('Alphab'.swapcase())  #转换大小写
print('lphab ssr'.title())  #转换为标题
print('咳嗽的 ds'.zfill(50))  #00000000000000000000000000000000000000000000咳嗽的 ds