Error발생합니다1

file=open('./testfile1.txt','w') try: file.write('Context Manager Test1 \nContextlib Test1.') finally: file.close() #Resource Allocated and return with open('./testfile2.txt', 'w') as f: f.write('Context Manager Test2\nContextlib Test2.') #EX3 Use class and Context Manager with exception Handling #class Enter and Exit MEthod class MyFileWriter: def __init__(self, file_name,method): print('MyFileWriter started : __init__') self.file_obj=open(file_name,method) def __enter__(self): print("MyFileWriter started : __enter__") return self.file_obj def __exit__(self,exc_type,value,trace_back): print("MyFileWriter started: __exit__") if exc_type: print('Logging exception {}'.format((exc_type,value,trace_back))) self.file_obj.close() with MyFileWriter('./testfile3.txt','w') as f: f.write('Conetext Manager Test3\nContextlib Test3.')