=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 no
")89ifpeople>cats:10print("Not many cats! The world is saved!")1112ifpeople<dogs:13print("The world is drooled on!")1415ifpeople>dogs:16print("The world is dry!")171819dogs+=52021ifpeople>=dogs:22print("People are greater than or equal to dogs.")2324ifpeople<=dogs:25print(...
foo=long_function_name(var_one,var_two,var_three,var_four) 当if语句的条件部分足够长,需要跨多行编写时,值得注意的是,两个字符的关键字(即 if),加上一个空格,再加上一个开括号,会为多行条件的后续行创建一个自然的4个空格缩进。这可能会在if语句内嵌的缩进代码块的可视上产生冲突,后者也会自然地缩进...
(self):# Construct a mock HTTP request.req = func.HttpRequest(method='GET', body=None, url='/api/my_second_function', params={'value':'21'})# Call the function.func_call = main.build().get_user_function() resp = func_call(req)# Check the output.self.assertEqual( resp.get_...
请注意,"if not x:"语句只检查x是否为假值(如0、False、None、空字符串等),而不会检查x是否具有其中一种特定类型的值。如果您想检查x是否为一些特定值,可以使用等于(==)运算符。例如: ```python x = "Hello" if x == "Hello": print("x is equal to Hello") else: print("x is not equal to...
--判断是否不为None:obj is not None unittest所有断言方法 1.下面是unittest框架支持的所有断言方法,有兴趣的同学可以慢慢看。 | assertAlmostEqual(self, first, second, places=None, msg=None, delta=None) | Fail if the two objects are unequal as determined by their ...
>>> a = "python" >>> b = "javascript" >>> assert a == b Traceback (most recent call last): File "<stdin>", line 1, in <module> AssertionError >>> assert (a == b, "Values are not equal") <stdin>:1: SyntaxWarning: assertion is always true, perhaps remove parentheses? >...
当该模块被当做执行脚本时，__name__为__main__（ A module’s __name__ is set equal to '_...
这段代码会输出x is not equal to 0和x is not equal to an empty string,因为None与整数0和空字符串不相等。 None的使用场景 None在Python中常被用于表示一个缺失的值或者一个空的对象。它可以用来初始化变量,以及作为默认参数值。当我们不确定某个变量的初始值时,可以将其赋值为None。例如: ...
if__name__ =='__main__': parser = argparse.ArgumentParser( description=__description__, epilog="Developed by {} on {}".format(", ".join(__authors__), __date__) ) parser.add_argument('EVIDENCE_FILE',help="Path to evidence file") ...