L = thisfile.readlines()

# to mix-up some other file put its name in place of 'RandomInput1.py'
#
L.sort()
#
   infile.write(line)
#  RandomInput1.py
#                 python3 RandomInput1.py 
   
infile.close()
for line in L:
from random import shuffle
thisfile = open('RandomInput1.py','r')  
# close files   
#------------------------------------------------------------------------------
# write mixed lines to infile

#  by mixing up the lines in this file. To run this program do: 
#------------------------------------------------------------------------------
# sort list and write lines to outfile
thisfile.close()
for line in L:
outfile = open(input('Enter output file name: '),'w')
#  Creates a matched pair of random input-output files for cmps 101 pa1 and pa2 

# read lines of this file into a list and randomize the list

   outfile.write(line)
shuffle(L)
infile = open(input('Enter input file name: '),'w')

#
outfile.close()
# get file names and open files