Programe is:
#
#     Dynamic precision results printing
#
a =17
i = 0
answer = 'y'
while answer == 'y' or answer =='Y':
    alfa = input('decimal point is:')
    FORMAT = " ' Result is:, '%." + alfa + "f'"
    print('format is:', FORMAT)
    print(FORMAT %a)
    answer = input(' to continue type y or Y: ')
    i = i +1
print(' Final running!', i, 'problems')

Results are:

Python 3.10.2 (v3.10.2:a58ebcc701, Jan 13 2022, 14:50:16) [Clang 13.0.0 (clang-1300.0.29.30)] on darwin
Type "help", "copyright", "credits" or "license()" for more information.
======== RESTART: /Users/ionivan/Documents/Dynamic precisionPrinting.py ========
decimal point is:1
format is:  ' Result is:, '%.1f'
 ' Result is:, '17.0'
 to continue type y or Y: y
decimal point is:2
format is:  ' Result is:, '%.2f'
 ' Result is:, '17.00'
 to continue type y or Y: y
decimal point is:3
format is:  ' Result is:, '%.3f'
 ' Result is:, '17.000'
 to continue type y or Y: y
decimal point is:10
format is:  ' Result is:, '%.10f'
 ' Result is:, '17.0000000000'
 to continue type y or Y: n
 Final running! 4 problems


(April 04, 2022) 

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