Example: Python if…else Statement number = int(input('Enter a number: '))ifnumber >0:print('Positive number')else:print('Not a positive number')print('This statement always executes') Run Code Sample Output 1 Enter a number: 10 Positive number This statement always executes If user enter...
Pythoncodeexample是我偶然间发现的网站,提供了许多Python常用模块的优雅写法。主网站还提供了许多其他语言的例子。 https://www.programcreek.com/www.programcreek.com/ 这里保存自己平时学到的python常用模块的用法。向大佬学习是最快的进步方法。 1.os.makedirs() 创建多级目录,创建一级使用os.mkdir 主要的两种...
# Filename : test.py# author by : www.runoob.com# 用户输入数字num=float(input("输入一个数字:"))ifnum>0:print("正数")elifnum==0:print("零")else:print("负数") 执行以上代码输出结果为: 输入一个数字:3正数 我们也可以使用内嵌 if 语句来实现: 实例(Python 3.0+) # Filename :test.py# ...
if any(number % 2 == 1 for number in numbers): print("至少存在一个奇数。") else: print("全是偶数。") primes = [2, 3, 5, 7] if all(number > 1 for number in primes): print("所有数都是大于1的质数。")2.3 自定义类与逻辑运算符重载 Python允许通过定义__bool__方法来自定义对象在...
for x in array: if x < pivot: less.append(x) else: greater.append(x) 冒号标志着缩进代码块的开始,冒号之后的所有代码的缩进量必须相同,直到代码块结束。不管是否喜欢这种形式,使用空白符是Python程序员开发的一部分,在我看来,这可以让python的代码可读性大大优于其它语言。虽然期初看起来很奇怪,经过一...
python中三元表达式的语法如下 ===if else result = xifconditionelsey 另外一种三元表达式,比较少见 result = (x, y)[condition] 列表推导式 ==〉循环 python中列表推导式用于使用其他列表创建一个新列表。 其基本形式为: [表达式 for 变量 in 列表] ...
``` # Python script to check the status of a website import requests def check_website_status(url): response = requests.get(url) if response.status_code == 200: # Your code here to handle a successful response else: # Your code here to handle an unsuccessful response ``` 说明: 此...
Example: x = 5 if x > 3: print("x is greater than 3") if .. else statement In Python, the if..else statement has two blocks: one for when the condition is True and another for when the condition is False. Syntax: if expression : ...
Specifically, conditional statements evaluate to either true or false, and this value determines if a specific piece of code will run. Conditionals always use the keywords if, else, andelif(short for "else if"). For example, if your child is making a game and their player has full health...
Example 1: Delete Rows from pandas DataFrame in PythonIn Example 1, I’ll illustrate how to remove some of the rows from our data set based on a logical condition.The Python code below keeps only the rows where the column x2 is smaller than 20:...