code: def test_barb_copy():
      fig, ax = plt.subplots()
      u = np.array([1.1])
      v = np.array([2.2])
      b0 = ax.barbs([1], [1], u, v)
      u[0] = 0
      assert b0.u[0] == 1.1
      v[0] = 0
      assert b0.v[0] == 2.2
  
imports: import platform
  import sys
  import numpy
  import pytest
  from matplotlib import pyplot
  from matplotlib.testing.decorators import image_comparison
label_desc: Use image node_id 17 for calling a global function with example usage: test_barb_copy() without return types