title: Find key-value min number in a dictionary Python
body: <p>I have this dictionary </p>
  
  <pre><code>my_dict = {'x':500, 'y':5874, 'z': 560}    
  key_min = min(my_dict.keys(), key=(lambda k: my_dict[k]))   
  print('Minimum Value: ',my_dict[key_min])
  </code></pre>
  
  <p>I want to print key correspond to minimum value. How can I do that?</p>
  
  <pre><code>print(my_dict.keys()[key_min])
  </code></pre>