先判断地址是否相等，相等返回true；比较类型是否一样，不一样，返回false。
=运算符判断它是否不等于0。如果不等于0,就输出The string is not equal to zero.,否则输出The string is equal to zero.。 示例 下面是一个完整的例子,演示了如何使用Python判断一个字符串不等于0: s=input("Please enter a string: ")ifs!="0":print("The string is not equal to zero.")else:prin...
1.assertEqual(self, first, second, msg=None) --判断两个参数相等:first == second 2.assertNotEqual(self, first, second, msg=None) --判断两个参数不相等:first != second 3.assertIn(self, member, container, msg=None) --判断是字符串是否包含:member in container 4.assertNotIn(self, member,...
=1print(notEqual)#输出结果:False#除法运算// 返回商的整数部分,抛弃余数divisorNumber=10//3print(divisorNumber)#输出结果:3#除法运算% 返回商的余数部分,抛弃商divisorNumber=10%3print(divisorNumber)#输出结果:1divisorNumber=10%1print(divisorNumber)#输出结果:0 /--没有余数则返回0--/divisorNumberx=10...
a=b'hello'b=b'world'result=a.compare(b)ifresult==0:print("The byte strings are equal")elifresult<0:print("The first byte string is less than the second")else:print("The first byte string is greater than the second") 1. 2. ...
在这个例子中的分析是,引发了ValueError异常,然后e就是该异常的一个实例,并且在生成这个实例e的过程中,异常参数('could not convert string to float: foo',)(注意这是一个元组),就会成为e的一个属性,而使用str(e)可以输出诊断信息的字符串,那是因为调用了该类实例的__str__()方法 。
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，...
If there are two arguments, they must be strings of equal length, and in the resulting dictionary, each character in x will be mapped to the character at the same position in y. If there is a third argument, it must be a string, whose characters will be mapped to None in the result...
Assign String to a Variable Assigning a string to a variable is done with the variable name followed by an equal sign and the string: Example a ="Hello" print(a) Try it Yourself » Multiline Strings You can assign a multiline string to a variable by using three quotes: ...
因此，分配给字符串中的索引位置会导致错误：>>> word[0] = 'J'...TypeError: 'str' object does not support item assignment>>> word[2:] = 'py'...TypeError: 'str' object does not support item assignmentIf you need a different string, you should create a new one:如果需要一个不同的字符...