suppose that
x = [ [-5.01,-5.43,1.08,0.86,-2.67,4.94,-2.51,-2.25,5.56,1.03], [-8.12,-3.48,-5.52,-3.78,0.63,3.29,2.09,-2.13,2.86,-3.33], [-3.68,-3.54,1.66,-4.11,7.39,2.08,-2.59,-6.94,-2.26,4.33]]you can notice that x has dimension 3*10 if you need to get the mean to each row you can type this
theMean = np.mean(x1,axis=1)don't forget to import numpy as np