ValueError: I/O operation on closed file. How to handle an error?

Question

Python

Good day. There is data that is stored in a dictionary, for example
{ 'Name_1' : 'Helen' , 'Name_2' : 'Michael' , 'Age_1' : '31' , 'Age_2' : '25'} There are many such dictionaries, they are all stored in the list. But it happens that the dictionary does not have, for example, 'Age_1' and when writing through a loop to a CSV file, it gives an error KeyError: 'Age_1' and ValueError: I/O operation on closed file. When handling an error through except KeyError: pass From the place where the error occurs, empty lines are written. Help how to handle the error.

Answer 1

so check it out

if 'Age_1' in custom__dict:
    #  потом уже, что-то делать 
     ....