body_fat_percentage occur a error message

[duoan]

Hi boy:
I found there is a issue when run in python3 and numpy 1.21.1

print("My PBF = {:.2f}% +/- {:.2f}%".format(my_pbf, -scores.mean()))

This line will occur a error like bellow message tip:

TypeError                                 Traceback (most recent call last)
<ipython-input-35-00d458076588> in <module>()
      2 scaled = scaler.transform(measurements)
      3 my_pbf = ridge.predict(scaled)+data['pbf_b'].mean()
----> 4 print("My PBF = {:.2f}% +/- {:.2f}%".format(my_pbf, -scores.mean()))

TypeError: unsupported format string passed to numpy.ndarray.__format__

I check this my_pbf is a array variable , so I change me code to

print("My PBF = {:.2f}% +/- {:.2f}%".format(my_pbf[0], -scores.mean()))