title: How to change an int value by strings combination
body: <p>I need to change an int value by strings combination</p>
  <pre><code>x = 'person'
  y = '400'
  
  person400 = 1000
  
  eval(x + y) = 3000 #i want to change person400 value by strings combination 
  
  
  print(person400) # print 3000
  </code></pre>