Python 入门基础教程：从环境配置到面向对象编程

Python 入门基础教程：从环境配置到面向对象编程 | 极客日志

print("Hello world")

print("Hello world")

print("你好，世界")

>>> 1 + 2
3
>>> 10 * 5
50
>>> 100 / 4
25.0

s = "Hello"
print(s)

text = "Python"
print(text[0])  # 输出 P
print(text[-1]) # 输出 n

my_list = [1, 2, 3, "four"]
my_list.append(5)
print(my_list)  # [1, 2, 3, 'four', 5]

print(my_list[1:3])  # [2, 3]

x = 10
if x > 5:
    print("X is greater than 5")
else:
    print("X is less than or equal to 5")

for i in range(5):
    print(i)

count = 0
while count < 5:
    print(count)
    count += 1

def greet(name):
    return f"Hello, {name}"

print(greet("User"))

help(len)

with open('test.txt', 'w') as f:
    f.write("Hello File")

with open('test.txt', 'r') as f:
    content = f.read()
    print(content)

try:
    result = 10 / 0
except ZeroDivisionError:
    print("Cannot divide by zero")
finally:
    print("Execution finished")

class Animal:
    def speak(self):
        pass

class Dog(Animal):
    def speak(self):
        return "Woof"

dog = Dog()
print(dog.speak())

import math
print(math.sqrt(16))

parent/
├── __init__.py
└── child/
    ├── __init__.py
    └── a.py

import sys
print(sys.path)

import sys
sys.path.append('/path/to/module')

Python 入门基础教程