Solve the programming task below in a Python markdown code block.
You will be given an array of numbers.

For each number in the array you will need to create an object. 

The object key will be the number, as a string. The value will be the corresponding character code, as a string.

Return an array of the resulting objects.

All inputs will be arrays of numbers. All character codes are valid lower case letters. The input array will not be empty.
Also feel free to reuse/extend the following starter code:
```python
def num_obj(s):
```