Try, Except, else and Finally in PythonAdditionally, have an else clause, which is executed if no exceptions are raised during the file operations. In this case, you can print a message indicating that the file was opened successfully. Also have a finally clause, which is always executed ...
Python Try, Except, Else and Finally Block Thefinallyclause can appear always after theelseclause. It does not change the behavior of the try/except block itself, however, the code under finally will be executed in all situations, regardless of if an exception occurred and it was handled, or...
# Program to depict else clause with try-except# Python 3# Function which returns a/bdefAbyB(a,b):try:c=((a+b)/(a-b))exceptZeroDivisionError:print("a/b result in 0")else:print(c)# Driver program to test above functionAbyB(2.0,3.0)AbyB(3.0,3.0) 输出 -5.0a/bresultin0 Python...
下面是一个更加复杂的例子(在同一个 try 语句里包含 except 和 finally 子句): >>>def divide(x, y): try: result = x / y except ZeroDivisionError: print("division by zero!") else: print("result is", result) finally: print("executing finally clause") >>> divide(2, 1) result is 2.0...
You should be careful about using the finally block, as it is not the same thing as using an else block in the try, except.您应该谨慎使用finally块,因为它与try中使用else块的功能不同,除了。The finally block will be run regardless of the outcome of the try except.无论try的结果如何,都将...
finally_clause.py try: file = open("report.txt", "w") file.write("Sample data") 100 / 0 except ZeroDivisionError: print("Division error occurred") finally: file.close() print("File resource closed") Thefinallyblock ensures the file is closed even after a division error interrupts the wr...
finally当try通过break,continue或return语句留下语句的 任何其他子句时,该子句也“跳出时”执行。 >>>defdivide(x, y):...try:...result = x / y...exceptZeroDivisionError:...print("division by zero!")...else:...print("result is", result)...finally:...print("executing finally clause") ...
Start with basic try-except blocks, then gradually incorporate else and finally clauses as needed. Remember, the goal isn’t to suppress all errors but to handle them in ways that make sense for your application.The next time you write Python code, ask yourself: “What could go wrong here...
Understanding the 'else' Clause in Python's 'try' Statement Python's exception handling mechanism provides three optional clauses— except, else, and finally— that can be used with the try clause. Each has a specific purpose and they together offer a robust way to anticipate and manage ...
python-异常 类别: 1.try/except #捕捉异常并恢复 ,与java等语言略有不同 2.try/finally #无论是否发生异常,都执行finally语句,即使try、except中包含return 3.raise #手动在代码中触发异常 4.assert #有条件的在程序中触发异常,可以视为有条件的raise语句 详细说明 5.with/as #实现环境管理器 6.try/excep...