'), # Integer or decimal number ('ASSIGN', r':='), # Assignment operator ('END', r';'), # Statement terminator ('ID', r'[A-Za-z]+'), # Identifiers ('OP', r'[+\-*/]'), # Arithmetic operators ('NEWLINE', r'\n'), # Line endings ('SKIP', r'[ \t]+'), # ...
AI代码解释 a,b=(1,2)# leftofbinary operatorforx,yin((1,2),(3,4),(5,6)):# leftofbinary operatorprint(x,y)del a,b # rightofunary statement deff(x):returnx,x**2# rightofunary statement 1.2 命名的元组 命名的元组(namedtuple)与普通元组一样,有相同的表现特征,其添加的功能就是可以根...
Here, we haven't used indentation after theifstatement. In this case, Python thinks ourifstatement is empty, which results in an error. Python if...else Statement Anifstatement can have an optionalelseclause. Theelsestatement executes if the condition in theifstatement evaluates toFalse. Syntax...
For example, pure assignment statements don’t return any value, as you’ll learn in a moment. Therefore, they’re not expressions. The assignment operator is a special operator that doesn’t create an expression but a statement. Note: Since version 3.8, Python also has what it calls ...
Applications of the if statement with not operator in pythonWe can use the if statement with the not operator to check if a list is empty or not. In python, an empty list, when used as a boolean expression, evaluates to False. So, using the not operator helps us to check if the ...
E227 missing whitespace around bitwise or shift operator E228 missing whitespace around modulo operator E231 missing whitespace after ',’, ';’, or ':’ E241 (*) multiple spaces after ',’ E242 (*) tab after ',’ E251 unexpected spaces around keyword / parameter equals ...
To implement conditionals in Python, use the if statement. The Python if statement takes a variety of forms. It can be combined with an elif statement, which stands for “else if”, or with an else option. The following sections explain how to best use the Python if statement in different...
temp=int(input("Enter the temperature: "))iftemp>30andtemp<40:print("It's a hot day!")else:print("It's not a hot day.")# Example using 'or' operatoriftemp>30ortemp<10:print("Temperature is extreme!")# Example using 'not' operatorifnot(temp>30andtemp<40):print("It's not a...
Python当中的判断语句非常简单,并且Python不支持switch,所以即使是多个条件,我们也只能罗列if-else。 # Let's just make a variable some_var = 5 # Here is an if statement. Indentation is significant in Python! # Convention is to use four spaces, not tabs. ...
表达式(expression)由标识符、字面量和操作符组成。其完成运算、属性访问、以及函数调用等。表达式像数学公式那样,总是返回一个结果。 语句(statement)则由一到多行代码组成,其着重于逻辑过程,完成变量复制、类型定义,以及控制执行流方向等。说起来,表达式算是语句的一