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05_exception.py
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76 lines (68 loc) · 1.64 KB
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# 异常
# FileNotFoundError
# f = open("D:/abc.tet", "r")
# Traceback (most recent call last):
# File "D:\python_learn\05_exception.py", line 3, in <module>
# f = open("D:/abc.tet", "r")
# ^^^^^^^^^^^^^^^^^^^^^^^
# FileNotFoundError: [Errno 2] No such file or directory: 'D:/abc.tet'
# 异常处理（捕获异常)---BUG提醒，程序继续运行
# 捕获异常（所有异常）
# try:
# f = open("D:/abc.tet", "r", encoding="UTF-8")
# except:
# print("出现异常，w模式打开")
# f = open("D:/abc.tet", "w", encoding="UTF-8")
#
# try:
# # 1 / 0
# # money += 10000
# print("working")
# except Exception as e:
# print("出现异常了")
# else: # 没有异常时执行的代码
# print("欧耶")
# 捕获指定异常
# try:
# print(name)
# except NameError as e:
# print(f"name未定义的异常\n{e}")
# 捕获多个异常
# try:
# # print(1 / 0)
# print(name)
# except (NameError, ZeroDivisionError) as e:
# print("变量未定义或者除数为0")
# finally
# try:
# f = open("D:/abc.txt", "r", encoding="UTF-8")
# except Exception as e:
# print("In except")
# f = open("D:/abc.txt", "w", encoding="UTF-8")
# else:
# print("No Error")
# finally:
# print("In finally")
# f.close()
# 异常的传递性（向上传递）
# def func1():
# print("beginning of func1")
# num = 1 / 0
# print("Ending of func1")
#
#
# def func2():
# print("beginning of func2")
# func1()
# print("Ending of func2")
#
#
# def main():
# try:
# func2()
# except Exception as e:
# print(f"出现异常了，异常信息为：{e}")
#
#
#
# main()