Format method in tkinter messagebox

Question

I would like to return a certain numeric value using the .format() method in Python 3, together with a small calculation in it with the div operator(/).

However the messagebox libraries do not support this feature.

        #Remind dilutions
    if self.initial_concentration > (1000):
        messagebox.INFO('Since your dilution is in the lowest range, consider a 1:100 pre-dilution first, so you would have {:2f}').format(answer)

Do you know how can I overcome this?

Thank you

Answer 1

messagebox.INFO('Since ... have {:2f}').format(answer)
#                                     ^
# calling `format` method of the return value of the `INFO(..)`,
#   (not against the formatting string)
# which may not exists; possibly causing AttributeError

Above line should be replaced with:

messagebox.INFO('Since ... have {:2f}'.format(answer))