Define functions on top or bottom of a script?

Question

In Python, all functions must be defined before they are available. This leaves two options for writing a script:

• Define the functions above:

  def f1():
      # something
  
  def f2():
      # something
  
  # Call f1
  f1()
  # Call f2
  f2()
  

• Define the functions below:

  def main():
      # Call f1
      f1()
      # Call f2
      f2()
  
  def f1():
      # something
  
  def f2():
      # something
  
  # Call main() at the bottom, after all the functions have been defined.
  if __name__ == '__main__':
      main()
  

Starting with Fortran, I was used to define functions at the bottom, but I saw a lot of Python scripts where the definition at the top seems to be preferred.

Is one of these options more Pythonic / recommended than the other? If so, why?

(I do not ask for an “opinion”; I ask for a reasoned reason why one of them is preferable, or if both of them are considered equally valid.)