filename = '00001'
print(f'C:\\Users\\user\\Desktop\\in\\{filename}.jpg')
#Python version under 3.6
print('C:\\Users\\user\\Desktop\\in\\{}.jpg'.format(filename))
ZmlsZW5hbWUgPSAnMDAwMDEnCnByaW50KGYnQzpcXFVzZXJzXFx1c2VyXFxEZXNrdG9wXFxpblxce2ZpbGVuYW1lfS5qcGcnKQoKI1B5dGhvbiB2ZXJzaW9uIHVuZGVyIDMuNgoKcHJpbnQoJ0M6XFxVc2Vyc1xcdXNlclxcRGVza3RvcFxcaW5cXHt9LmpwZycuZm9ybWF0KGZpbGVuYW1lKSk=