code: def test_semilogx(self):
      fig, ax = plt.subplots()
      ax.semilogx(...)
  
imports: import datetime
  import numpy
  import pytest
  import matplotlib.pyplot
  import matplotlib
label_desc: Use image node_id 37 for calling the TestDatetimePlotting obj's underlying member method code with example usage: obj.test_semilogx() without return types