title: How do I write a float list of lists to file in Python
body: <p>I need to write a series of matrices out to a plain text file from python.  All my matricies are in float format so the simple 
  file.write() and file.writelines()</p>
  
  <p>do not work.  Is there a conversion method I can employ that doesn't have me looping through all the lists (matrix = list of lists in my case) converting the individual values?</p>
  
  <p>I guess I should clarify, that it needn't look like a matrix, just the associated values in an easy to parse list, as I will be reading in later.  All on one line may actually make this easier!</p>