str内部方法

代码

#str内部功能
name='  aK am	il.L	iu'
age=18
num=-11
ab='#'
ac=('1','2','3','4','5','6','7')
print(dir(name))
print(name.capitalize())#capitalize(self)：首字母大写
print(name.center(30,'#'))#center(self, width, fillchar=None): 内容居中，width：总长度；fillchar：空白处填充内容，默认无
print(name.count('i'))#count(self, sub, start=None, end=None):子序列个数
'''
decode(self, encoding=None, errors=None):解码
encode(self, encoding=None, errors=None):编码，针对unicode
'''
print(name.endswith('u'))#endswith(self, suffix, start=None, end=None)：是否以xxx结束 startswith(self, prefix, start=None, end=None):是否起始
print(name)
print(name.expandtabs(3))#expandtabs(self, tabsize=None):将tab转换成空格，默认一个tab转换成8个空格
print(name.find('i'))#find(self, sub, start=None, end=None):寻找子序列位置，如果没找到，返回 –1
print(name.find('b'))
#format(*args, **kwargs):字符串格式化，动态参数，讲函数式编程时细说
print(name.index('il'))#index(self, sub, start=None, end=None): 子序列位置，如果没找到，报错
print(name.isalnum())#
'''
isalnum(self): 是否是字母和数字
isalpha(self):是否是字母
isdigit(self):是否是数字
islower(self): 是否小写
translate(self, table, deletechars=None):转换，需要先做一个对应表，最后一个表示删除字符集合
'''
print(ab.join(ac))#join(self, iterable):连接
print(name.ljust(30,'$'))#ljust(self, width, fillchar=None):内容左对齐，右侧填充    zfill(self, width):方法返回指定长度的字符串，原字符串右对齐，前面填充0。
print(name.lower())#lower(self):变小写     swapcase(self):大写变小写，小写变大写
print(name.lstrip())#lstrip(self, chars=None):移除左侧空白      strip(self, chars=None):移除两端空白
print(name.partition('m'))#partition(self, sep):分割，前，中，后三部分
print(name.replace('am', 'qqqqqq'))#replace(self, old, new, count=None):替换
print(name.split())#split(self, sep=None, maxsplit=None):分割， maxsplit最多分割几次
print(name.splitlines())#splitlines(self, keepends=False):根据换行分割

 结果

['__add__', '__class__', '__contains__', '__delattr__', '__dir__', '__doc__', '__eq__', '__format__', '__ge__', '__getattribute__', '__getitem__', '__getnewargs__', '__gt__', '__hash__', '__init__', '__iter__', '__le__', '__len__', '__lt__', '__mod__', '__mul__', '__ne__', '__new__', '__reduce__', '__reduce_ex__', '__repr__', '__rmod__', '__rmul__', '__setattr__', '__sizeof__', '__str__', '__subclasshook__', 'capitalize', 'casefold', 'center', 'count', 'encode', 'endswith', 'expandtabs', 'find', 'format', 'format_map', 'index', 'isalnum', 'isalpha', 'isdecimal', 'isdigit', 'isidentifier', 'islower', 'isnumeric', 'isprintable', 'isspace', 'istitle', 'isupper', 'join', 'ljust', 'lower', 'lstrip', 'maketrans', 'partition', 'replace', 'rfind', 'rindex', 'rjust', 'rpartition', 'rsplit', 'rstrip', 'split', 'splitlines', 'startswith', 'strip', 'swapcase', 'title', 'translate', 'upper', 'zfill']
  ak am	il.l	iu
#######  aK am	il.L	iu########
2
True
  aK am	il.L	iu
  aK am  il.L  iu
8
-1
8
False
1#2#3#4#5#6#7
  aK am	il.L	iu$$$$$$$$$$$$$$$
  ak am	il.l	iu
aK am	il.L	iu
('  aK a', 'm', '	il.L	iu')
  aK qqqqqq	il.L	iu
['aK', 'am', 'il.L', 'iu']
['  aK am	il.L	iu']