这里statement1和statement2两个变量都为字符串,但是quantity这个变量为整数,因此print statement1 + quantity + statement2会报错TypeError: cannot concatenate 'str' and 'int' objects, 提示不能将字符串和整数拼接合并。解决的办法是使用str()这个函数将quantity从整数转化为字符串,举例如下: ...
如果.是放在赋值语句后面,且值是非整数,就会报错 1#值是字符型2In [18]: x*y3Out[18]:245In [19]: a="bb".6File"<ipython-input-19-35d6cdca8521>", line17a="bb".8^9SyntaxError: invalid syntax1011#值是浮点型12In [20]: a =1.9.13File"<ipython-input-20-d03258cd8a31>", line114a =...
The primary way to create a variable in Python is to assign it a value using the assignment operator and the following syntax:Python Syntax variable_name = value In this syntax, you have the variable’s name on the left, then the assignment (=) operator, followed by the value you want...
l[3]表示访问列表的第四个元素 l [1, 2, 3, 40] tup = (1, 2, 3, 4) tup[3] = 40 Traceback (most recent call last): File "<stdin>", line 1, in <module> TypeError: 'tuple' object does not support item assignment
The basic assignment statement works for a single variable and a single expression. You can also assign a single value to more than one variables simultaneously.Syntax:var1=var2=var3...varn= = <expr>Example:x = y = z = 1 Now check the individual value in Python Shell....
In Python, theequal sign (=) assigns a variable to a value: >>>count=4>>>count4 This is called anassignment statement. We've pointed the variablecountto the value4. We don't have declarations or initializations Some programming languages have an idea ofdeclaring variables. ...
SyntaxError: multiple statements found while compiling a single statement 这是因为整体复制过去运行而产生的错误;解决方案如下: 方法一:先将第一行复制,敲一下回车,再将剩下的部分复制过去,运行; 方法二:Ctrl+N,新建一个,这时直接将代码复制进来,就不会产生这个问题了;直接在IDLE中编译,是每行都要回车的。如...
Variable：在程序中存储数据的标识符。Assignment：将值分配给变量的操作。Function：一段可重用的代码块，...
If a script argument is given, the directory containing the script is inserted in the path in front of $PYTHONPATH. The search path can be manipulated from within a Python program as the variable sys.path. PYTHONSTARTUP If this is the name of a readable file, the Python commands in that...
Variable names Numeric variables Strings Get the current date and time Operators overview Arithmetic operators Comparison operators Logical operators Assignment operators Membership operators Identity operators Conditional statements The if statement Get user input The if...else statement The if...elif stateme...