如何修改matplotlib x轴ticklabels?

以下是一个示例代码:

import matplotlib.pyplot as plt
import matplotlib.ticker as ticker
import numpy as np
import math
x = np.arange(0, math.pi*2, 0.05)
fig = plt.figure()
ax = fig.add_axes([0.1, 0.1, 0.8, 0.8])
y = np.sin(x)
ax.plot(x, y, marker='s')
ax.set_xlabel('angle')
ax.set_title('sine')
#ax.set_xticklabels([" ",1,2,3,4,5," "]) # don't work
ax.set_yticks([-1,0,1])
plt.show()

它创建了这个图:

对于x轴,我想修改x轴的ticklabels,只显示1,2,3,4,5,而我想空白0和6。我试过了 ax.set_xticklabels([" ",1,2,3,4,5," "]) 但这并没有奏效。我得到的结果是:

以及此警告消息:

Warning (from warnings module):
  File "~/test.py", line 12
    ax.set_xticklabels(["",1,2,3,4,5,""]) # don't work
UserWarning: FixedFormatter should only be used together with FixedLocator

如何修改x轴ticklabels以仅显示1,2,3,4,5?