Python Error

import os
import sys
import time
def FuncOut(data, variables):
    item = 0
    ctrl = 0
    while ctrl != '~':
        if data[item] == '$':
            tmp_item = item + 1
            data[tmp_item] = variables.get(data[tmp_item], "# VARIABLE ERROR #")
        if data[item] == '#':
            data.pop(item)
            ctrl = '~'
    out = ''
    for i in data:
        out = out + ' ' + i
    print(out)
    return

def FuncCreateVariable(data, variables):
    variable_name = data[0]
    variable_data = data[1]
    vg = variables.get(data[0])
    if vg == 'None':
        isEmpty = '1'
    else:
        isEmpty = '0'
    variable_data = variable_data.split('$', ' ')
    if isEmpty == '1':
        variables = {variables** variable_name : variable_data}
        return variables
    else:
        new_variables = variables.pop(variable_name)
        variables = {new_variables** variable_name : variable_data}
        return variables











file = sys.argv[1]
command = '0'
line = 0
run = 'yes'
variables = {}
while run == 'yes':
    openfile = open(file, 'r+')
    dat = openfile.readlines()
    current_command = dat[line]
    current_command_main = str(current_command).split()
    print(current_command_main[0])
    command = current_command_main[0]
    line = line + 1
    if command == "OUT":
        tmp = current_command_main
        tmp.pop(0)
        FuncOut(tmp, variables)
    if command == "SET":
        tmp = current_command_main
        tmp.pop(0)
        FuncCreateVariable(current_command_main, variables)