title: SELECT columns from a variable in Python PYODBC
body: <p>my first question up here, please be kind.
  I am new to both python and SQL so I am finding my way. 
  I am writing a function in python which should select columns from a table in the database with column names coming from a variable (list). Below is what I want the code to look like, obviously it does not work. Is there a way to do it, or I should not bother and instead of a list type column names directly into c.execute? Thank you! Alex</p>
  
  <pre><code>def data_extract1():
      column_list1 = ["column1","column2"]
      c.execute ('SELECT column_list1 FROM myBD' )
      for row in c.fetchall():
          print (row)
  </code></pre>