#------------------------------------------------------------------------------
#  RandomInput6.py
#  Creates a random input file for CSE 101 pa6 by selecting a number of lines 
#  at random from a file. The number of lines to select is given by user input. 
#  Note that the same line may be selected multiple times. 
#  
#  To run this program, do 
#
#            python3 RandomInput6.py 
#     
#------------------------------------------------------------------------------
from random import choice

# open file to randomize
file1 = open( input('Enter name of file to read from: '),'r')

# get file to write to
file2 = open( input('Enter name of file to write to: '),'w')

# get number of lines to write to file
n = int( input('Enter the number of lines to write: ') )

# select n lines from file1 (with replacement)
R = file1.readlines()
W = []
for i in range(n):
   W.append(choice(R))

# write random lines to file2
for line in W:
   file2.write(line)
   
# close files   
file1.close()
file2.close()