title: split groups of values into two columns
body: <p>I have a big list that basically looks like:</p>
  
  <pre><code>_list = [('123.45','678.90'), ('098.76', '543.21'),('135.79','246.80')]
  </code></pre>
  
  <p>The parentheses come from another function, so I am unsure if it is part of the output, or if it is placed there as a reference of some sorts.</p>
  
  <p>And I need to split the left values into a left column, with the corresponding right values in another column, where I will have both in a new dataframe:</p>
  
  <pre><code>col1 = ['123.45', '098.76','135.79']
  col2 = ['678.90', '543.21', '246.80']
  new_df = pd.concat([col1, col2])
  </code></pre>
  
  <p>I tried the .split() function, but realized i had multiple commas, so that would include incorrect values : ")" or "(".</p>
  
  <p>Is there something else I can try?</p>