User:Alice/Special Issue V

Code

<source lang=python>

import linecache import textwrap import sys from sys import exit

class LeavingProgram(Exception):

   pass

def parse(program):

   cmds = program.split(',')
   splitted_cmds = []
   for cmd in cmds:
       splitted = cmd.split()
       splitted_cmds.append(splitted)
   return splitted_cmds

   #return tokenize(program)

def tokenize(s):

   return s.split()

def repl():

   while True:
       try:
           val = eval(parse(input('> ')))
           if val is not None:
               print(val)
       except LeavingProgram:
           break

text = None line_number = 0 last_index = 0

def eval(cmds):

   global text
   global line_number
   global last_index

   for cmd in cmds:
       if cmd == []:
           line_number += 1
           last_index = 0

       elif cmd[0] == 'load':
           contents = open('output.txt').read()
           text = textwrap.wrap(contents, 40, break_long_words=True)
           print('\n'.join(text))
           line_number = 0
           last_index = 0

       elif cmd[0] == 'show':
           print(text[line_number])

       elif cmd[0] == 'under':
           current_line = text[line_number]
           char_number = int(cmd[1]) - 1
           char_list = list(current_line)

           x=range(last_index, char_number + last_index + 1)
           for time in x:
               if time < len(char_list):
                   char_list[time] = u'\u21e2'

           last_index += char_number + 1

           joined = .join(char_list)
           text[line_number] = joined

       elif cmd[0] == 'over':
           last_index += int(cmd[1])

       elif cmd[0] == 'pattern':

           pattern = text[0:line_number + 1]
           print('\n'.join(pattern))

       elif cmd[0] == 'quit':
           print('Adios!')
           raise LeavingProgram()
       else:
           joined = ' '.join(cmd)
           print('Did not understand command {}'.format(joined))

if __name__ == '__main__':

   repl()

<source>