title: Why is there a difference in using method ".plot()" between jupyter notebook and pycharm?
body: <p>I'm following pandas tutorial<a href="https://pandas.pydata.org/docs/getting_started/intro_tutorials/04_plotting.html" rel="nofollow noreferrer">1</a> with pycharm.</p>
  <p>Tutorial describes how to use method '.plot()' with jupyter-notebook as
  <a href="https://i.stack.imgur.com/mdhkY.png" rel="nofollow noreferrer">enter image description here</a></p>
  <p>But if I write this code in pycharm, nothing is shown.
  if I change code as below, it works same with image</p>
  <pre><code>    import pandas as pd
      import matplotlib.pyplot as plt
  
      air_quality = pd.read_csv(&quot;air_quality_no2.csv&quot;, index_col=0, 
      parse_dates=True)
  
      plt.plot(air_quality)
      plt.show()
  </code></pre>
  <p>Why is there a difference in using method &quot;.plot()&quot; between jupyter notebook and pycharm?</p>
  <p>Thanks.</p>