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
# 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") ...
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: file.close() This ensures that the file is closed whether an exception is raised or not. The try-except mechanism is essential for creating reliable and user-friendly Python programs, allowing for the anticipation and handling of potential errors gracefully. Else Clause The else ...
try…except Python: Finally But what if we want a message to print both if an error is returned and if no error is found? That’s where the finally block comes in. If you define a finally clause, its contents will be executed irrespective of whether the try…except block raises an err...
try:file=open("example.txt","r")content=file.read()print(content)exceptFileNotFoundError:print("Error: The file was not found.")else:print("File read operation successful.")finally:if'file'inlocals():file.close()print("File operation is complete.") ...
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 ...