python 3.x - plt.errorbar issue: FutureWarning: elementwise comparison failed; returning scalar instead -

when execute code 1 below, plt.errorbar, following warning message:

futurewarning: elementwise comparison failed; returning scalar instead, in future perform elementwise comparison if self._edgecolors == str('face'):

import numpy np import matplotlib.pyplot plt  x = np.array([1,2,3,4,5,6,7,8,9,10]) y = np.array([2,3,5,6,5,4,6,7,2,1]) yerreur = np.array([2,4,5,1,1,3,4,5,2,1])  plt.figure(1)  plt.errorbar(x,y,yerr = yerreur,fmt = 'none',ecolor = 'k')  plt.savefig('test.pdf')  plt.show() 

how can fix issue? affect graph in way?

this issue taken care of in version 1.5.x:

it should 1.5 branched master after merged , on 1.5.x branch

make sure _edgecolors string before comparison string

try updating matplotlib latest version.