#!/bin/python3
import os

def GetPos():
	pos = int(input ("Enter a position 0-9, 10 to quit > "))
	return pos;

def DoARead():
	task = input("Enter r to read, w to write, or d to dump the file > ")
	task = task[0].lower()

	return  task 

fd = os.open("seekerFile.txt",os.O_RDWR)

values = 'abcdefghij'

len = os.lseek(fd,0,os.SEEK_END);
if (len < 10):
   print ("\tCreating the file")
   os.lseek(fd,0,os.SEEK_SET)
   os.write(fd,values.encode())


len = os.lseek(fd,0,os.SEEK_END);

pos = GetPos()
while pos < 10:
        os.lseek(fd, pos, os.SEEK_SET)
        action = DoARead()
        if action == 'r': 
            value = os.read(fd,1) 
            print("The value at position", pos , " is " , value.decode()) 
        elif action == 'w' :
            value = input("Enter a character to write >");
            os.write(fd, value[0].encode())
        elif action == 'd':
            print ("Dumping the file")
            os.lseek(fd, 0, os.SEEK_SET)
            text = os.read(fd,len)
            print (text.decode())
        print(" ")
        pos = GetPos()