title: AttributeError: 'DataFrame' object has no attribute 'save'
body: <p>I'm trying to save a pandas DataFrame in binary data formats and book says that pandas objects all have save method which writes the data to disc as a pickle. but when I run the code there is an error. Is there save method for pandas objects in pandas new versions? I'm using pandas 0.25.3</p>
  
  <pre><code>import pandas as pd
  
  frame = pd.read_csv('PandasTest.csv')
  frame.save('PandasTest_Pickle')
  </code></pre>
  
  <p>The error is:</p>
  
  <pre><code>AttributeError: 'DataFrame' object has no attribute 'save'
  </code></pre>