string="Hello, World!"print(string[0])# 输出'H'print(string[4])# 输出'o'print(string[-1])# 输出'!'defget_nth_character(string,n):index=n-1ifindex<0orindex>=len(string):return"Index out of range!"returnstring[index]string="Hello, World!"print(get_nth_character(string,1))# 输出...
We’re not changing the underlying string that was assigned to it before. We’re assigning a whole new string with different content. In this case, it was pretty easy to find the index to change as there are few characters in the string.How are we supposed to know which character to ch...
string.ascii_lowercase string.ascii_uppercase string.digits string.hexdigits string.octdigits string.punctuation string.printable string.whitespace 2. 自定义字符串格式 2.1 class string.Formatter 3. 格式字符串语法 field_name conversion format_spec 3.1 格式规范Mini-Language 3.1.1 定义 3.1.2 各选项的含...
string containing all characters considered printable 19 20 """ 21 22 # Some strings for ctype-style character classification 23 whitespace = ' \t\n\r\v\f' 24 lowercase = 'abcdefghijklmnopqrstuvwxyz' 25 uppercase = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ' 26 letters = lowercase + uppercase 27 ascii_...
【Python3_基础系列_005】Python3-string-字符串 一、string的方法 >>>dir(str) ['__add__', '__class__', '__contains__', '__delattr__', '__dir__', '__doc__', '__eq__', '__format__', '__ge__', '__getattribute__', '__getitem__', '__getnewargs__', '__gt_...
String Length To get the length of a string, use thelen()function. Example Thelen()function returns the length of a string: a ="Hello, World!" print(len(a)) Try it Yourself » Check String To check if a certain phrase or character is present in a string, we can use the keywordin...
For example, imagine I wanted to ask, is the character y part of my string? 所以我可以输入y,我可以问,y在S中吗? So I can type in my y, and I can ask, is y in S? 答案将会是真的。 And the answer is going to be True. 如果我使用大写字母Y,答案将是错误的。 If I use capital...
7、character :字符 二、字符串的操作 1、user:用户 2、name:姓名/名称 3、attribute:字段/属性 4、value:值 5、key:键 三、重复/转换/替换/原始字符串 1、upper:上面 2、lower:下面 3、capitalize:用大写字母写或印刷 4、title:标题 5、replace:替换 ...
Slicing: Access a range of characters in a string by using the slicing operator colon :. For example, greet = 'Hello' # access character from 1st index to 3rd index print(greet[1:4]) # "ell" Run Code Note: If we try to access an index out of the range or use numbers other th...
编码默认为sys.getdefaultencoding()。 Errors默认为'strict'。 """ def capitalize(self, *args, **kwargs): # real signature unknown """ Return a capitalized version of the string. More specifically, make the first character have upper case and the rest lower ...