Collection de codes de base Python

print("Hello, World!")

x = 10
y = "Hello"

if x > 5:
    print("x大于5")
elif x == 5:
    print("x等于5")
else:
    print("x小于5")

for i in range(5):
    print(i)
    
while x > 0:
    print(x)
    x -= 1

def add(x, y):
    return x + y

try:
    # 可能发生异常的代码
    result = 10 / 0
except ZeroDivisionError:
    # 处理异常的代码
    print("除数不能为零")

x = 10
y = 3.14
z = complex(1, 2)

s = "Hello, World!"
print(s[0])  # 输出第一个字符
print(s[7:12])  # 输出从第8个字符到第12个字符

lst = [1, 2, 3, 4, 5]
print(lst[0])  # 输出第一个元素
print(lst[2:4])  # 输出第3个元素到第4个元素

tpl = (1, 2, 3, 4, 5)
print(tpl[0])  # 输出第一个元素
print(tpl[2:4])  # 输出第3个元素到第4个元素

dic = {"name": "Tom", "age": 18}
print(dic["name"])  # 输出键为"name"的值
print(dic.keys())  # 输出所有键
print(dic.values())  # 输出所有值

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

f = open("file.txt", "r")

content = f.read()
print(content)