在python中处理除以0错误和nan问题

try:
    result = 1 / 0
except ZeroDivisionError:
    print("Error: Division by zero is not allowed.")
    result = None  # 或者你可以设置一个默认值

divisor = 0
if divisor != 0:
    result = 1 / divisor
else:
    print("Error: Division by zero is not allowed.")
    result = None  # 或者你可以设置一个默认值

import math

result = 1 / 0  # 这会产生NaN
if math.isnan(result):
    print("Error: Result is NaN.")
    result = None  # 或者你可以设置一个默认值

import math

def safe_division(numerator, denominator):
    try:
        result = numerator / denominator
    except ZeroDivisionError:
        print("Error: Division by zero is not allowed.")
        result = None
    else:
        if math.isnan(result):
            print("Error: Result is NaN.")
            result = None
    return result

# 测试
print(safe_division(1, 0))  # 输出: Error: Division by zero is not allowed.
print(safe_division(1, float('nan')))  # 输出: Error: Result is NaN.
print(safe_division(1, 2))  # 输出: 0.5