operator模块是python中内置的操作符函数接口,它定义了一些算术和比较内置操作的函数。operator模块是用c实现的,所以执行速度比 python 代码快。 在operator 中有一个方法contains可以很方便地判断子串是否在字符串中。 代码语言:javascript 代码运行次数:0 运行 AI代码解释 >>>importoperator>>>operator.contains("hello...
Astringis a Python data type that’s used to represent a piece of text. It’s written between quotes, either double quotes or single quotes and can be as short as zero characters, or empty string, or as long as you wish. Strings can beconcatenatedto build longer strings using the plus...
Return a copy of the string with trailing characters removed. The chars argument is a string specifying the set of characters to be removed. If omitted or None, the chars argument defaults to removing whitespace. The chars argument is not a suffix; rather, all combinations of its values are ...
**operator.__ne__(a,b)** operator.ge(a,b)相当于a>b **operator.__ge__(a,b)** operator.gt(a,b)相当于a >= b **operator.__gt__(a,b)** 注:这些函数可以返回任何值,这些值可能会或可能不会被解释为布尔值。 operator.concat(a, b) 对于 a、b序列,返回 a + b(列表合并) **oper...
# 输入字符串和操作符string1=input("请输入第一个字符串:")string2=input("请输入第二个字符串:")operator=input("请输入操作符(+、-、*、/):") 1. 2. 3. 4. 步骤2:判断操作符的类型 接下来,我们需要判断用户输入的操作符是加法、减法、乘法还是除法。可以使用Python的if-elif-else语句来进行判断。
#Does the string str contain World? print "World" in str # prints True #Does the string str contain world? (note: case sensitive) print "world" in str # prints False print "code" not in str # prints True 1. 2. 3. 4. 5. ...
f-string可以进行合并 可以使用+ 或者str.join来进行合并 # Implicit string concatenation>>> f"{123}" " = " f"{100}" " + " f"{20}" " + " f"{3}"'123 = 100 + 20 + 3'# Explicity concatenation using '+' operator>>> f"{12}" + " != " + f"{13}"'12 != 13'# string ...
Strings can be concatenated (glued together) with the + operator, and repeated with *: 字符可以用+号连接在一起，也可以用*号重复。>>> # 3 times 'un', followed by 'ium'>>> 3 * 'un' + 'ium''unununium'Two or more string literals (i.e. the ones enclosed between quotes) next ...
1、自动化office，包括对excel、word、ppt、email、pdf等常用办公场景的操作，python都有对应的工具库，...
2.String(字符串) 3.Tuple(元组); –可变数据(3 个): 1.List(列表) 2.Dictionary(字典) 3.Set(集合)。 2.10 Python数字 • 数字数据类型用于存储数值。数字类型是不可改变的数据类型,这意味着改变数字数据类型会分配一个新的对象。当你指定一个值时,Number对象就会被创建: ...