Python是一種強大的編程語言，擁有許多有用的表達式。

# 賦值表達式
x = 5
y = "Hello World"
z = [1, 2, 3]
# 算術表達式
a = 10
b = 5
c = a + b    # c = 15
d = a - b    # d = 5
e = a * b    # e = 50
f = a / b    # f = 2.0（Python3中）
# 邏輯表達式
g = True
h = False
i = g and h    # i = False
j = g or h     # j = True
k = not g      # k = False
# 比較表達式
l = 10
m = 5
n = l >m    # n = True
o = l< m    # o = False
p = l == m   # p = False
q = l != m   # q = True
r = l >= m   # r = True
s = l<= m   # s = False
# 字符串表達式
t = "Hello"
u = "World"
v = t + u      # v = "HelloWorld"
w = t * 3      # w = "HelloHelloHello"
x = len(t)     # x = 5
y = str(123)   # y = "123"
# 列表表達式
z = [1, 2, 3]
a = z[0]         # a = 1
b = z[1:3]       # b = [2, 3]
c = len(z)       # c = 3
d = z.count(2)   # d = 1

上述表達式可以幫助開發人員快速準確地處理各種數據類型。Python的表達式豐富多彩，學會使用它們可以大大提高代碼的效率和可讀性。