title: Get rid of grey background in python matplotlib bar chart
body: <p>How do I get rid of the grey background in the plot below made using foll command in python matplotlib</p>
  
  <pre><code>ax.bar(x_axis,bar_val,yerr=err_val,linewidth=0,width=0.2)
  </code></pre>
  
  <p><img src="https://i.stack.imgur.com/Ogwe0.png" alt="enter image description here"></p>