title: how to get the first element in the parenthesis
body: <p>I have data like in the file below and I want to extract the first value inside the parenthesis of Test accuracies.</p>
  
  <pre><code>Intent i1
  
  Test accuracies:
  (0.90, 1.0, 0.8095238095238095, 0.8947368421052632)
  Test average id : 1.0446857355e-06
  Test average ood : 0.0693251593621
  ood_train: 173
  ood_test: 42
  ood_val: 113
  
  Intent i2
  
  Test accuracies:
  (0.92, 1.0, 0.8571428571428571, 0.923076923076923)
  Test average id entropy: 8.82025156164e-06
  Test average ood entropy: 0.0688835002447
  ood_train: 173
  ood_test: 42
  ood_val: 113
  
  Intent i3
  
  Test accuracies:
  (0.93, 1.0, 0.8095238095238095, 0.8947368421052632)
  Test average id entropy: 2.35249270365e-07
  Test average ood entropy: 0.0534607628718
  ood_train: 173
  ood_test: 42
  ood_val: 113
  </code></pre>
  
  <p>I want to print the first entry after the parenthesis that appears after "Test accuracies" like below:</p>
  
  <pre><code>0.90
  0.92
  0.93
  </code></pre>
  
  <p>I was trying to use this command but I can't get there in one step</p>
  
  <pre><code>awk -F"[()]" '{print $2}' file.txt
  </code></pre>