title: How to extract a formatted string using regex in Python?
body: <p>I am trying to find a regex in Python3 that extract a formatted string from input text :
  The general format of the string is : 4 uppercase caracters followed by 3 numbers </p>
  
  <p>Input : </p>
  
  <pre><code>"JFFC002    /0 EXÉRÈSE LÉS. RÉTROPÉRIT. COELIO 
  KFFA001 /0 EXÉRÈSE T. PARAPHARYNGIENNE CERV.TOMIE LACA004   /0 O.S FRAC. ANT. SINUS FRONTAL AB. CORONAL LACA014 /0 O.S FRAC. BILAT. ANT. SINUS FRONTAL AB. CORONAL "
  </code></pre>
  
  <p>Output :</p>
  
  <pre><code>['JFFC002' , 'KFFA001' ,'LACA004', 'LACA014' ]
  </code></pre>
  
  <p>I appreciate your help!</p>