>>> print(vendor1) Cisco >>> print(vendor2) Juniper >>> print vendor3 Arista 也许你已经注意到了,这里我们在打印vendor1和vendor2的值时用到了括号(),而打印vendor3时则没有使用括号。这是因为print语句在Python 3里是函数,必须带括号(),在Python 2则是可有可无,如果你使用的
On the other hand, we might want to format the numerical output of a float variable. For example, in the case a product with taxes: In this case between thecurly bracketswe’re writing a formatting expression. These expressions are needed when we want to tell Python to format our values ...
# 在模板渲染时 (极度简化概念) # def render_variable(variable_value, autoescape_is_on=True): # if autoescape_is_on and not isinstance(variable_value, SafeData): # return escape(str(variable_value)) # elif hasattr(variable_value, '__html__'): # return variable_value.__html__() # el...
请注意,print指令是缩进的:这意味着它属于由if子句定义的作用域。执行这段代码会产生: $ python conditional.1.py I need to call my manager! 由于late是True,print语句被执行了。让我们扩展一下这个例子: # conditional.2.pylate =Falseiflate:print('I need to call my manager!')#1else:print('no nee...
point1.move(3,4)print(point1.calculate_distance(point2))print(point1.calculate_distance(point1)) 结尾处的print语句给出了以下输出: 5.04.472135954999580.0 这里发生了很多事情。这个类现在有三个方法。move方法接受两个参数x和y,并在self对象上设置值,就像前面示例中的旧reset方法一样。旧的reset方法现在调...
for x in range(WIDTH): if (x, y) == (playerx, playery): print(PLAYER, end='') elif (x, y) == (exitx, exity): print('X', end='') elif maze[(x, y)] == WALL: print(BLOCK, end='') else: print(maze[(x, y)], end='') print() # Print a newline after printi...
0 # from f.seek(0) >>> print(grep_process.stdout.decode("utf-8")) python3 python3-config python3.8 python3.8-config ... As you learned in the previous section, for Windows PowerShell, doing something like this doesn’t make a whole lot of sense because most of the time, these uti...
data=pd.DataFrame({'x1':range(5,10),# Create pandas DataFrame'x2':range(10,15),'x3':range(20,25)})print(data)# Print pandas DataFrame Have a look at the table that got returned after executing the previously shownPython programming code. It shows that our examplepandas DataFrameis cons...
Note:print()function prints space after the value of each variable, space is the default value ofsep parameter– which is an optional parameter inprint() function, by using this parameter, we can specify the separator value. Syntax print(variable1, varaible2, variable3, ...) ...
Print Nicely with pprint() All of our examples have used print() (or just the variable name, in the interactive interpreter) to print things. Sometimes, the results are hard to read. We need a pretty printer such as pprint() Get Random We played with random.choice() at the beginning ...