我添加了一个没有人提到的解决方案，使用symphony库中的Interval类:

from sympy import Interval

lower_value, higher_value = 10000, 30000
number = 20000

 # to decide whether your interval shhould be open or closed use left_open and right_open 
interval = Interval(lower_value, higher_value, left_open=False, right_open=False)
if interval.contains(number):
    print("you have to pay 5% taxes")

条件应该是，

if number == 10000 and number <= 30000:
     print("5% tax payable")

使用number == 10000的原因是，如果number的值是50000，如果我们使用number >= 10000，条件就会通过，这不是你想要的。

当且仅当数值落在10,000到30,000之间时，希望输出输出打印给定语句。

代码应该是;

if number >= 10000 and number <= 30000:
    print("you have to pay 5% taxes")

我添加了一个没有人提到的解决方案，使用symphony库中的Interval类:

from sympy import Interval

lower_value, higher_value = 10000, 30000
number = 20000

 # to decide whether your interval shhould be open or closed use left_open and right_open 
interval = Interval(lower_value, higher_value, left_open=False, right_open=False)
if interval.contains(number):
    print("you have to pay 5% taxes")

试试这个简单的函数;它检查A是否在B和C之间(B和C的顺序可能不对):

def isBetween(A, B, C):
    Mi = min(B, C)
    Ma = max(B, C)
    return Mi <= A <= Ma

所以isBetween(2, 10， -1)和isBetween(2， -1, 10)是一样的。

下面是一些可能的方法，从最好到最差的表现(即第一个将表现最好)

     # Old school check
     if 10000 >= b and b <=30000:
        print ("you have to pay 5% taxes")
     # Python range check
     if 10000 <= number <= 30000:
        print ("you have to pay 5% taxes")
     # As suggested by others but only works for integers and is slow
     if number in range(10000,30001):
        print ("you have to pay 5% taxes")