title: Add edge to matplotlib plot and give a edgecolor (no scatter)
body: <pre><code>import numpy as np
  import pandas as pd
  import matplotlib.pyplot as plt
  df = pd.DataFrame(np.random.randint(0,100,size=(5, 2)), columns=list('AB'))
  
  
  plt.plot(df.A,df.B,color='black',marker='o',linestyle='', markersize=5)
  </code></pre>
  
  <p>Insted of putting <code>black</code> dots, I want to put <code>white</code> dots with <code>black</code> circle/edge and adjust edge size</p>