PROGRAMMING:JMU Python exception basic edition of student performance processing

Xiao Ming is helping the teacher to process the data. The first line of the data is n, which means there are n lines of integer scores to be counted.
If there is no error in the data, calculate the average value (keep 2 decimal places) and output.
If there is an error in the data, the processing will be stopped directly and the calculation will not be carried out.
**Note: * * the program can handle small errors appropriately. For example, if there are spaces on the left and right of some data, remove them first
The space is processed again.
###Input format:
The first line, N, represents the number of rows to be entered next.
Then enter the n-line score (integer).
###Output format:
If there is no exception in the input process, output 'all OK'. Otherwise, the error information in the format shown in examples 2 and 3 will be output.
If there is no exception, output: ` AVG grade = average '. Average (2 decimal places reserved)
No matter whether there are exceptions in the input process, the final output is ` process completed '`
###Input sample 1:
```in
three
one
two
three
```
###Output sample 1:
```out
All OK
avg grade = 2.00
Process Completed
```
###Input sample 2:
```in
three
a b
```
###Output sample 2:
```out
Error for data " a b"! Break
Process Completed
```
###Input sample 3:
```in
three
one
a
```
###Output sample 3:
```out
Error for data "a"! Break
Process Completed
```







answer：If there is no answer, please comment