在Python中,错误处理主要通过异常处理机制来实现
try-except
语句捕获异常:def find_function(value):
try:
# 可能引发异常的代码
result = 10 / value
except ZeroDivisionError:
print("Error: Division by zero")
return None
except Exception as e:
print(f"Error: {e}")
return None
else:
return result
# 调用find_function
result = find_function(0)
if result is not None:
print(f"Result: {result}")
try-except-else-finally
语句处理多种异常:def find_function(value):
try:
# 可能引发异常的代码
result = 10 / value
except ZeroDivisionError:
print("Error: Division by zero")
return None
except TypeError:
print("Error: Invalid input type")
return None
else:
return result
finally:
print("Function execution completed")
# 调用find_function
result = find_function("a")
if result is not None:
print(f"Result: {result}")
class CustomError(Exception):
pass
def find_function(value):
if value == "error":
raise CustomError("Custom error occurred")
return 10 / value
try:
result = find_function("error")
except CustomError as e:
print(f"Error: {e}")
assert
语句进行调试:def find_function(value):
assert value != 0, "Division by zero"
return 10 / value
try:
result = find_function(0)
except AssertionError as e:
print(f"Error: {e}")
请根据您的需求选择合适的错误处理策略。在实际编程中,建议使用try-except
语句来捕获和处理异常,以确保程序的稳定性和健壮性。