Update retrying.py

[Sergfalt]

Add print_exception attribute for exception printing for every attempt.
For example

####Define functions (before_attempts, after_attempts)####
def print_attemt(attempt):
print(f"Start Attempt # {attempt}")
return attempt

def print_attemt_after(attempt):
print(f"Attempt # {attempt} was failed")
return attempt

Then call a func function with retry (we also can use retry as a decorator with func definition)

retry(stop_max_attempt_number=3,
print_exception=True,
before_attempts=print_attemt, after_attempts=print_attemt_after)(func)(par)

After func call we get the below

Start Attempt # 1
[Errno 2] No such file or directory: 'F:\TEST\test.txt'
Attempt # 1 was failed
Start Attempt # 2
[Errno 2] No such file or directory: 'F:\TEST\test.txt'
Attempt # 2 was failed
Start Attempt # 3
[Errno 2] No such file or directory: 'F:\TEST\test.txt'
Attempt # 3 was failed