Copy a read program into a write program Python

Question

def SpecialCharacter():

'opening read file'

      with open('CS210_Project_Three_Input_File.txt', 'r') as f:

         groceries = f.read().splitlines()  

     frequencies = {}

     for grocery in groceries:

      if grocery not in frequencies:

         frequencies[grocery] = 0
            
      frequencies[grocery] += 1

    for grocery in frequencies:

      print(grocery, frequencies[grocery])

I am trying to take the above modified read file and copy it to the below write file.

with open('frequency.dat','w') as wf:    
  for line in f:
     wf.write(line)