python --version

python3 --version

$ python
Python 3.10.0 (default, Oct  4 2021, 09:35:00)
[GCC 9.3.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> print("Hello, Python!")
Hello, Python!

print("Hello, Python!")

python hello.py

name = "Alice"  # 字符串
age = 25        # 整數(shù)
height = 1.75   # 浮點(diǎn)數(shù)
is_student = True  # 布爾值

print(type(name))  # <class 'str'>
print(type(age))   # <class 'int'>

name = input("請(qǐng)輸入你的名字: ")  # 用戶(hù)輸入
print("你好,", name)  # 輸出

text = "Hello, Python!"
print(text.upper())   # 轉(zhuǎn)大寫(xiě)
print(text.lower())   # 轉(zhuǎn)小寫(xiě)
print(text.replace("Python", "World"))  # 替換
print(text[0:5])  # 字符串切片

a, b = 10, 3
print(a + b)  # 加法
print(a - b)  # 減法
print(a * b)  # 乘法
print(a / b)  # 除法
print(a // b) # 取整除
print(a % b)  # 取余數(shù)
print(a ** b) # 冪運(yùn)算

score = int(input("請(qǐng)輸入你的分?jǐn)?shù): "))
if score >= 90:
    print("優(yōu)秀")
elif score >= 60:
    print("及格")
else:
    print("不及格")

# for 循環(huán)
for i in range(1, 6):
    print(i, end=" ")  # 輸出 1 2 3 4 5
print()  # 換行
# while 循環(huán)
n = 5
while n > 0:
    print(n, end=" ")  # 輸出 5 4 3 2 1
    n -= 1

fruits = ["蘋(píng)果", "香蕉", "橙子"]
print(fruits[0])  # 訪(fǎng)問(wèn)第一個(gè)元素
fruits.append("葡萄")  # 添加元素
fruits.remove("香蕉")  # 刪除元素
print(len(fruits))  # 列表長(zhǎng)度

colors = ("紅色", "藍(lán)色", "綠色")
print(colors[1])  # 訪(fǎng)問(wèn)元素

person = {"name": "Alice", "age": 25, "city": "Beijing"}
print(person["name"])  # 訪(fǎng)問(wèn)值
person["age"] = 26  # 修改值
person["gender"] = "Female"  # 添加新鍵值對(duì)
del person["city"]  # 刪除鍵值對(duì)

numbers = {1, 2, 3, 4, 5}
numbers.add(6)  # 添加元素
numbers.remove(3)  # 刪除元素
print(numbers)

def greet(name):
    return f"Hello, {name}!"
print(greet("Alice"))  # Hello, Alice!

def introduce(name, age=18):
    print(f"姓名: {name}, 年齡: {age}")
introduce("Tom")         # 默認(rèn)年齡 18
introduce("Jerry", 25)   # 指定年齡 25

with open("example.txt", "r") as file:
    content = file.read()
    print(content)

with open("example.txt", "w") as file:
    file.write("Hello, Python 文件操作！")

try:
    num = int(input("輸入一個(gè)整數(shù): "))
    result = 10 / num
except ZeroDivisionError:
    print("錯(cuò)誤: 不能除以 0")
except ValueError:
    print("錯(cuò)誤: 請(qǐng)輸入正確的數(shù)字")
else:
    print("結(jié)果:", result)
finally:
    print("程序結(jié)束")

import math
print(math.sqrt(16))  # 計(jì)算平方根

pip install requests

import requests
response = requests.get("https://api.github.com")
print(response.status_code)

class Person:
    def __init__(self, name, age):
        self.name = name
        self.age = age
    def introduce(self):
        print(f"我是 {self.name}，今年 {self.age} 歲")
p = Person("Alice", 25)
p.introduce()  # 我是 Alice，今年 25 歲