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This is a follow up to the questions: PyDOS shell simulation and PyDOS: Version 2.0

This is a follow up to the questions: PyDOS shell simulation and PyDOS: Version 2.0

Rollback to Revision 4
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rolfl
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Updated - 01/05/15or05/01/15Depending where you are.

Whats New?

  • Code updated
  • About app now added.
  • PyWrite under construction, therefore it has been removed from the home screen.
#PyDOS Version 3.0 - Written by Mrfunny744
import time
import os
import sys
import random
def ChangeName(): #Change your display name
 os.system('cls' if os.name == 'nt' else 'clear')
 print ("----------------------------------------------")
 name = input ("Type in your new username: ")
 print()
 print ("This can be changed again if you wish.")
 print ("----------------------------------------------")
 time.sleep(2.5)
def shutdown(): #Shutting down PyDOS
 print ("------------------------")
 print ("| |")
 print ("| Thank you for using |")
 print ("| PyDOS |")
 print ("| |")
 print ("| |")
 print ("| |")
 print ("| Shutting Down... |")
 print ("| |")
 print ("------------------------")
 sys.exit(0)
def end_simple_calcend():
 simplecalcprint ("------------------------------------")
def end_calc print ("| |"):
 print ("Thank"| you Thanks for using SimpleCalc"SimpleCalc! |")
 print ("| |")
 print ("------------------------------------")
 time.sleep(2)
def calccalc_a(operation, num1, num2): #Operation System for SimpleCalc
 if operation ==print 'a':("----------------------------------")
 return num1 + num2
 elif= operationint(input("Enter ==a 's'number: "))
 return num1 - num2 elif= operationint(input("Enter ==a 'm'number: return num1 * num2"))
 elif operation ==print 'd':("----------------------------------")
 if num2answer === 0:num1+num2
 raiseprint ValueError('Divide"Your byanswer 0is:" expection',answer)
 return num1 /print num2("----------------------------------")
 else:time.sleep(3)
 raise ValueErrorend('Unknown error')
def simplecalc(): #Main screen for SimpleCalc
 print ("----------------------------------------------------------")
 print ("|Welcome to SimpleCalc! You have the following operators:|")
 print ("|A: Add  |")
 print ("|S: Subtract |")
 print ("|M: Multiply |")
 print ("|D: Divide |")
 print ("|Q: Quit |")
 print ("----------------------------------------------------------")
def calc_m():
 choice print ("----------------------------------")
 num1 = int(input("Enter a number: "))
 num2 = int("Choiceinput("Enter a number: "))
 print ("----------------------------------")
 answer = num1*num2
 print ("Your answer is:" ,answer)
 print ("----------------------------------")
 time.lowersleep(3)
 end()[0]
def calc_s():
 if choiceprint ==("----------------------------------")
 'q' num1 = int(input("Enter a number: "))
 num2 = int(input("Enter a end_simple_calcnumber: "))
 print ("----------------------------------")
 answer = num1-num2
 return print ("Your answer is:" ,answer)
 print ("----------------------------------")
 time.sleep(3)
 end()
def calc_d():
 if choiceprint not("----------------------------------")
 in "asmd" num1 = int(input("Enter a number: "))
 num2 = int(input("Enter a number: "))
 print ("Invalid"----------------------------------")
 specification. answer = num1/num2
 print ("Your answer is:" ,answer)
 print ("----------------------------------")
 end_simple_calctime.sleep(3)
 end()
 return
 try:
 num1 = int(input("Enter a number: "))
 num2 = int(input("Enter a number: "))
 print ("Your answer is:", calc(choice, num1, num2))

def simplecalc():
 except ValueErrorprint as("--------------------------")
 err print ("| |")
 print ("| Welcome to SimpleCalc |")
 print ("| |")
 print ("| A = Add |")
 print ("| M = Multiply |")
 print ("| S = Subtract |")
 print ("| D = Divide |")
 print ("| Q = Quit |")
 print ("| |")
 print ("--------------------------")
 print ("| |")
 choice = input ("| Choice: |")
 print ("|  |")
 print(err"--------------------------")
 if choice == 'a':
 calc_a()
 elif choice == 'm':
 calc_m()
 elif choice == 's':
 calc_s()
 elif choice == 'd':
 calc_d()
 elif choice == 'q':
 end()
 else:
 print ("Invalid specifacation.args")
 end_calc()
 
def error_message(): #Shown if the app does not exist.
 os.system('cls' if os.name == 'nt' else 'clear')
 print ("----------------------")
 print ("| Whoops! |")
 print ("| |")
 print ("| |")
 print ("| It dosent look |")
 print ("| like the app |")
 print ("| exists. |")
 print ("| |")
 print ("|Check and try again.|")
 print ("----------------------")
 time.sleep(3)
def About(): #About App
 print ("-------------------------------------------------------------")
 print ("| About PyDOS |")
 print ("| |")
 print ("| Version: 3.0 (Alpha 1.3) |")
 print ("| |")
 print ("| Dev Code: 47329257945 |")
 print ("| |")
 print ("| Serial Key: 357-494-626-181 |")
 print ("| |")
 print ("| |")
 print ("| |")
 print ("| |")
 print ("| |")
 print ("| |")
 print ("| |")
 print ("| Thanks for using PyDOS! |")
 print ("-------------------------------------------------------------")
 print ("| |")
 print ("| Please press enter to close app |")
 print ("| |")
 print ("-------------------------------------------------------------")
 input()

os.system('cls' if os.name == 'nt' else 'clear') #This is the startup screen. It only appears once beacuse of the While loop below.
print ("---------------------------")
print ("| |")
print ("| |")
print ("| Welcome to PyDOS! |")
print ("| |")
print ("| |")
print ("| |")
print ("| |")
print ("| |")
print ("| Version 3.0 |")
print ("| Alpha Edition |")
print ("| |")
print ("| |")
print ("---------------------------")
time.sleep(3)
print ()
print ("-----------------------------------------------")
name = input ("Enter a name: ")
print ("-----------------------------------------------")
print ("Information has been saved.")
print ()
print ("This data will be used in some applications.")
print ("-----------------------------------------------")
time.sleep(3)
while True: #This is the home screen
 os.system('cls' if os.name == 'nt' else 'clear')
 print ("-------------------------")
 print ("| |")
 print ("| |")
 print ("| Loading Home |")
 print ("| Screen |")
 print ("| |")
 print ("| |")
 print ("| |")
 print ("| |")
 print ("| |")
 print ("-------------------------")
 time.sleep(1.5)
 os.system('cls' if os.name == 'nt' else 'clear')
 print ("-------------------------------------------------------------------------------")
 print ("| Username:",name," |")
 print ("-------------------------------------------------------------------------------")
 print ("| |")
 print ("| PyDOS Home Screen - Type in an app below. |")
 print ("| |")
 print ("| Apps: |")
 print ("| |")
 print ("| ChangeName |")
 print ("| Shutdown |")
 print ("| SimpleCalc |")
 print ("| PyWrite |")
 print ("| About |")
 print ("| |")
 print ("| |")
 print ("| |")
 print ("| |")
 print ("| PyDOS Version 3.0 Alpha (Alpha 1.2 |")
 print ("-------------------------------------------------------------------------------")
 selection = input("Select An App: ")
 command_actions = {
 'ChangeName' : ChangeName,
 'SimpleCalc' : simplecalc,
 'Shutdown' : shutdown
 }
 if selection in command_actions:
 action = command_actions[selection]
 action()
 else:
 error_message()

Updated - 01/05/15or05/01/15Depending where you are.

Whats New?

  • Code updated
  • About app now added.
  • PyWrite under construction, therefore it has been removed from the home screen.
#PyDOS Version 3.0 - Written by Mrfunny744
import time
import os
import sys
import random
def ChangeName(): #Change your display name
 os.system('cls' if os.name == 'nt' else 'clear')
 print ("----------------------------------------------")
 name = input ("Type in your new username: ")
 print()
 print ("This can be changed again if you wish.")
 print ("----------------------------------------------")
 time.sleep(2.5)
def shutdown(): #Shutting down PyDOS
 print ("------------------------")
 print ("| |")
 print ("| Thank you for using |")
 print ("| PyDOS |")
 print ("| |")
 print ("| |")
 print ("| |")
 print ("| Shutting Down... |")
 print ("| |")
 print ("------------------------")
 sys.exit(0)
def end_simple_calc():
 simplecalc()
def end_calc():
 print ("Thank you for using SimpleCalc")
 time.sleep(2)
def calc(operation, num1, num2): #Operation System for SimpleCalc
 if operation == 'a':
 return num1 + num2
 elif operation == 's': return num1 - num2 elif operation == 'm': return num1 * num2
 elif operation == 'd':
 if num2 == 0:
 raise ValueError('Divide by 0 expection')
 return num1 / num2
 else:
 raise ValueError('Unknown error')
def simplecalc(): #Main screen for SimpleCalc
 print ("----------------------------------------------------------")
 print ("|Welcome to SimpleCalc! You have the following operators:|")
 print ("|A: Add  |")
 print ("|S: Subtract |")
 print ("|M: Multiply |")
 print ("|D: Divide |")
 print ("|Q: Quit |")
 print ("----------------------------------------------------------")
 choice = input ("Choice: ").lower()[0]
 if choice == 'q':
 end_simple_calc()
 return
 if choice not in "asmd":
 print ("Invalid specification.")
 end_simple_calc()
 return
 try:
 num1 = int(input("Enter a number: "))
 num2 = int(input("Enter a number: "))
 print ("Your answer is:", calc(choice, num1, num2))

 except ValueError as err:
 print(err.args)
 end_calc()
 
def error_message(): #Shown if the app does not exist.
 os.system('cls' if os.name == 'nt' else 'clear')
 print ("----------------------")
 print ("| Whoops! |")
 print ("| |")
 print ("| |")
 print ("| It dosent look |")
 print ("| like the app |")
 print ("| exists. |")
 print ("| |")
 print ("|Check and try again.|")
 print ("----------------------")
 time.sleep(3)
def About(): #About App
 print ("-------------------------------------------------------------")
 print ("| About PyDOS |")
 print ("| |")
 print ("| Version: 3.0 (Alpha 1.3) |")
 print ("| |")
 print ("| Dev Code: 47329257945 |")
 print ("| |")
 print ("| Serial Key: 357-494-626-181 |")
 print ("| |")
 print ("| |")
 print ("| |")
 print ("| |")
 print ("| |")
 print ("| |")
 print ("| |")
 print ("| Thanks for using PyDOS! |")
 print ("-------------------------------------------------------------")
 print ("| |")
 print ("| Please press enter to close app |")
 print ("| |")
 print ("-------------------------------------------------------------")
 input()

os.system('cls' if os.name == 'nt' else 'clear') #This is the startup screen. It only appears once beacuse of the While loop below.
print ("---------------------------")
print ("| |")
print ("| |")
print ("| Welcome to PyDOS! |")
print ("| |")
print ("| |")
print ("| |")
print ("| |")
print ("| |")
print ("| Version 3.0 |")
print ("| Alpha Edition |")
print ("| |")
print ("| |")
print ("---------------------------")
time.sleep(3)
print ()
print ("-----------------------------------------------")
name = input ("Enter a name: ")
print ("-----------------------------------------------")
print ("Information has been saved.")
print ()
print ("This data will be used in some applications.")
print ("-----------------------------------------------")
time.sleep(3)
while True: #This is the home screen
 os.system('cls' if os.name == 'nt' else 'clear')
 print ("-------------------------")
 print ("| |")
 print ("| |")
 print ("| Loading Home |")
 print ("| Screen |")
 print ("| |")
 print ("| |")
 print ("| |")
 print ("| |")
 print ("| |")
 print ("-------------------------")
 time.sleep(1.5)
 os.system('cls' if os.name == 'nt' else 'clear')
 print ("-------------------------------------------------------------------------------")
 print ("| Username:",name," |")
 print ("-------------------------------------------------------------------------------")
 print ("| |")
 print ("| PyDOS Home Screen - Type in an app below. |")
 print ("| |")
 print ("| Apps: |")
 print ("| |")
 print ("| ChangeName |")
 print ("| Shutdown |")
 print ("| SimpleCalc |")
 print ("| About |")
 print ("| |")
 print ("| |")
 print ("| |")
 print ("| |")
 print ("| PyDOS Version 3.0 Alpha (Alpha 1.2 |")
 print ("-------------------------------------------------------------------------------")
 selection = input("Select An App: ")
 command_actions = {
 'ChangeName' : ChangeName,
 'SimpleCalc' : simplecalc,
 'Shutdown' : shutdown
 }
 if selection in command_actions:
 action = command_actions[selection]
 action()
 else:
 error_message()
 

#PyDOS Version 3.0 - Written by Mrfunny744
import time
import os
import sys
import random
def ChangeName():
 os.system('cls' if os.name == 'nt' else 'clear')
 print ("----------------------------------------------")
 name = input ("Type in your new username: ")
 print()
 print ("This can be changed again if you wish.")
 print ("----------------------------------------------")
 time.sleep(2.5)
def shutdown():
 print ("------------------------")
 print ("| |")
 print ("| Thank you for using |")
 print ("| PyDOS |")
 print ("| |")
 print ("| |")
 print ("| |")
 print ("| Shutting Down... |")
 print ("| |")
 print ("------------------------")
 sys.exit(0)
def end():
 print ("------------------------------------")
  print ("| |")
 print ("| Thanks for using SimpleCalc! |")
 print ("| |")
 print ("------------------------------------")
 time.sleep(2)
def calc_a():
 print ("----------------------------------")
 num1 = int(input("Enter a number: "))
 num2 = int(input("Enter a number: "))
 print ("----------------------------------")
 answer = num1+num2
 print ("Your answer is:" ,answer)
 print ("----------------------------------")
 time.sleep(3)
 end()
 
def calc_m():
 print ("----------------------------------")
 num1 = int(input("Enter a number: "))
 num2 = int(input("Enter a number: "))
 print ("----------------------------------")
 answer = num1*num2
 print ("Your answer is:" ,answer)
 print ("----------------------------------")
 time.sleep(3)
 end()
def calc_s():
 print ("----------------------------------")
  num1 = int(input("Enter a number: "))
 num2 = int(input("Enter a number: "))
 print ("----------------------------------")
 answer = num1-num2
  print ("Your answer is:" ,answer)
 print ("----------------------------------")
 time.sleep(3)
 end()
def calc_d():
 print ("----------------------------------")
  num1 = int(input("Enter a number: "))
 num2 = int(input("Enter a number: "))
 print ("----------------------------------")
  answer = num1/num2
 print ("Your answer is:" ,answer)
 print ("----------------------------------")
 time.sleep(3)
 end()
 
def simplecalc():
 print ("--------------------------")
  print ("| |")
 print ("| Welcome to SimpleCalc |")
 print ("| |")
 print ("| A = Add |")
 print ("| M = Multiply |")
 print ("| S = Subtract |")
 print ("| D = Divide |")
 print ("| Q = Quit |")
 print ("| |")
 print ("--------------------------")
 print ("| |")
 choice = input ("| Choice: |")
 print ("|  |")
 print("--------------------------")
 if choice == 'a':
 calc_a()
 elif choice == 'm':
 calc_m()
 elif choice == 's':
 calc_s()
 elif choice == 'd':
 calc_d()
 elif choice == 'q':
 end()
 else:
 print ("Invalid specifacation.")
 
def error_message():
 os.system('cls' if os.name == 'nt' else 'clear')
 print ("----------------------")
 print ("| Whoops! |")
 print ("| |")
 print ("| |")
 print ("| It dosent look |")
 print ("| like the app |")
 print ("| exists. |")
 print ("| |")
 print ("|Check and try again.|")
 print ("----------------------")
 time.sleep(3)
os.system('cls' if os.name == 'nt' else 'clear')
print ("---------------------------")
print ("| |")
print ("| |")
print ("| Welcome to PyDOS! |")
print ("| |")
print ("| |")
print ("| |")
print ("| |")
print ("| |")
print ("| Version 3.0 |")
print ("| Alpha Edition |")
print ("| |")
print ("| |")
print ("---------------------------")
time.sleep(3)
print ()
print ("-----------------------------------------------")
name = input ("Enter a name: ")
print ("-----------------------------------------------")
print ("Information has been saved.")
print ()
print ("This data will be used in some applications.")
print ("-----------------------------------------------")
time.sleep(3)
while True:
 os.system('cls' if os.name == 'nt' else 'clear')
 print ("-------------------------")
 print ("| |")
 print ("| |")
 print ("| Loading Home |")
 print ("| Screen |")
 print ("| |")
 print ("| |")
 print ("| |")
 print ("| |")
 print ("| |")
 print ("-------------------------")
 time.sleep(1.5)
 os.system('cls' if os.name == 'nt' else 'clear')
 print ("-------------------------------------------------------------------------------")
 print ("| Username:",name," |")
 print ("-------------------------------------------------------------------------------")
 print ("| |")
 print ("| PyDOS Home Screen - Type in an app below. |")
 print ("| |")
 print ("| Apps: |")
 print ("| |")
 print ("| ChangeName |")
 print ("| Shutdown |")
 print ("| SimpleCalc |")
 print ("| PyWrite |")
 print ("| About |")
 print ("| |")
 print ("| |")
 print ("| |")
 print ("| PyDOS Version 3.0 Alpha (Alpha 1.2 |")
 print ("-------------------------------------------------------------------------------")
 selection = input("Select An App: ")
 command_actions = {
 'ChangeName' : ChangeName,
 'SimpleCalc' : simplecalc,
 'Shutdown' : shutdown
 }
 if selection in command_actions:
 action = command_actions[selection]
 action()
 else:
 error_message()
updated code, new idea added.
Source Link
PyxlWuff
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  • 3
  • 14

Updated - 01/05/15or05/01/15Depending where you are.

Whats New?

  • Code updated
  • About app now added.
  • PyWrite under construction, therefore it has been removed from the home screen.
#PyDOS Version 3.0 - Written by Mrfunny744
import time
import os
import sys
import random
def ChangeName(): #Change your display name
 os.system('cls' if os.name == 'nt' else 'clear')
 print ("----------------------------------------------")
 name = input ("Type in your new username: ")
 print()
 print ("This can be changed again if you wish.")
 print ("----------------------------------------------")
 time.sleep(2.5)
def shutdown(): #Shutting down PyDOS
 print ("------------------------")
 print ("| |")
 print ("| Thank you for using |")
 print ("| PyDOS |")
 print ("| |")
 print ("| |")
 print ("| |")
 print ("| Shutting Down... |")
 print ("| |")
 print ("------------------------")
 sys.exit(0)
def endend_simple_calc():
 print simplecalc("------------------------------------")
 print
def end_calc("| |"):
 print ("| "Thank Thanksyou for using SimpleCalc!  |")
 print ("| |")
 print ("------------------------------------"SimpleCalc")
 time.sleep(2)
def calc_acalc(operation, num1, num2): print#Operation ("----------------------------------")
System for SimpleCalc
 num1 = int(input("Enterif aoperation number:== "))'a':
 return num1 + num2 = int(input("Enter a number:elif "))operation == 's':
 print ("--------------------------------- return num1 -") num2
 answerelif =operation num1+num2== 'm':
 print ("Your answer is:" ,answer)return num1 * num2
 printelif ("----------------------------------")operation == 'd':
 time.sleep(3) if num2 == 0:
 end raise ValueError('Divide by 0 expection')
 return num1 / num2
 else:
 raise ValueError('Unknown error')
def calc_msimplecalc(): #Main screen for SimpleCalc
 print ("----------------------------------------------------------")
 num1 =print int(input("Enter"|Welcome ato number:SimpleCalc! ")You have the following operators:|")
 num2 =print int(input("Enter"|A: aAdd number: ") |")
 print ("----------------------------------""|S: Subtract |")
 answerprint =("|M: num1*num2Multiply |")
 print ("Your"|D: answerDivide is |")
 print ("|Q:" ,answerQuit |")
 print ("----------------------------------------------------------")
 time.sleep(3)
 end()
 
def calc_s():
 print ("----------------------------------")
 num1 = int(input("Enter a number: "))
  num2choice = int(input("Enter a number: "))
 print ("----------------------------------")
 answer = num1-num2
  print ("Your answer is"Choice:" ,answer)
  print ("----------------------------------")
 time.sleep(3)
 endlower()[0]
def calc_d():
 print ("----------------------------------")
 num1 = int(input("Enter a number: "))
 num2 = int(input("Enter a number: "))
 print ("----------------------------------")
  answer = num1/num2
  printif ("Yourchoice answer== is'q':" ,answer)
 print ("----------------------------------")
  time.sleepend_simple_calc(3)
 end()
 return
 if choice not in "asmd":
 print ("Invalid specification.")
 end_simple_calc()
 return

def simplecalc():
 print ("--------------------------")
 print ("| |")try:
 print ("| Welcome to SimpleCalc |")
 num1 print= int("| |")
 print input("| A = Add "Enter a number: |"")
 print ("| M = Multiply |")
 print ("| S = Subtract  |")
  print ("| Dnum2 = Divide  |")
 print int("| Q = Quit |")
 print input("| |")
 "Enter a printnumber: ("--------------------------")
 print ("| |")
 choice = input ("| Choice: |")
 print ("|  |")
 print ("--------------------------")
 if choice == 'a':
  calc_a()
 elif choice"Your ==answer 'm'is:", calc_mcalc()
 elif choice == 's':
 , num1, calc_s(num2)
 elif choice == 'd':
 calc_d()
 elif choice == 'q':
 end()
 except ValueError as elseerr:
 print("Invalid specifacationerr."args)
 end_calc()
 
def error_message(): #Shown if the app does not exist.
 os.system('cls' if os.name == 'nt' else 'clear')
 print ("----------------------")
 print ("| Whoops! |")
 print ("| |")
 print ("| |")
 print ("| It dosent look |")
 print ("| like the app |")
 print ("| exists. |")
 print ("| |")
 print ("|Check and try again.|")
 print ("----------------------")
 time.sleep(3)
def About(): #About App
 print ("-------------------------------------------------------------")
 print ("| About PyDOS |")
 print ("| |")
 print ("| Version: 3.0 (Alpha 1.3) |")
 print ("| |")
 print ("| Dev Code: 47329257945 |")
 print ("| |")
 print ("| Serial Key: 357-494-626-181 |")
 print ("| |")
 print ("| |")
 print ("| |")
 print ("| |")
 print ("| |")
 print ("| |")
 print ("| |")
 print ("| Thanks for using PyDOS! |")
 print ("-------------------------------------------------------------")
 print ("| |")
 print ("| Please press enter to close app |")
 print ("| |")
 print ("-------------------------------------------------------------")
 input()

os.system('cls' if os.name == 'nt' else 'clear') #This is the startup screen. It only appears once beacuse of the While loop below.
print ("---------------------------")
print ("| |")
print ("| |")
print ("| Welcome to PyDOS! |")
print ("| |")
print ("| |")
print ("| |")
print ("| |")
print ("| |")
print ("| Version 3.0 |")
print ("| Alpha Edition |")
print ("| |")
print ("| |")
print ("---------------------------")
time.sleep(3)
print ()
print ("-----------------------------------------------")
name = input ("Enter a name: ")
print ("-----------------------------------------------")
print ("Information has been saved.")
print ()
print ("This data will be used in some applications.")
print ("-----------------------------------------------")
time.sleep(3)
while True: #This is the home screen
 os.system('cls' if os.name == 'nt' else 'clear')
 print ("-------------------------")
 print ("| |")
 print ("| |")
 print ("| Loading Home |")
 print ("| Screen |")
 print ("| |")
 print ("| |")
 print ("| |")
 print ("| |")
 print ("| |")
 print ("-------------------------")
 time.sleep(1.5)
 os.system('cls' if os.name == 'nt' else 'clear')
 print ("-------------------------------------------------------------------------------")
 print ("| Username:",name," |")
 print ("-------------------------------------------------------------------------------")
 print ("| |")
 print ("| PyDOS Home Screen - Type in an app below. |")
 print ("| |")
 print ("| Apps: |")
 print ("| |")
 print ("| ChangeName |")
 print ("| Shutdown |")
 print ("| SimpleCalc |")
 print ("| PyWrite |")
 print ("| About |")
 print ("| |")
 print ("| |")
 print ("| |")
 print ("| |")
 print ("| PyDOS Version 3.0 Alpha (Alpha 1.2 |")
 print ("-------------------------------------------------------------------------------")
 selection = input("Select An App: ")
 command_actions = {
 'ChangeName' : ChangeName,
 'SimpleCalc' : simplecalc,
 'Shutdown' : shutdown
 }
 if selection in command_actions:
 action = command_actions[selection]
 action()
 else:
 error_message()
 

#PyDOS Version 3.0 - Written by Mrfunny744
import time
import os
import sys
import random
def ChangeName():
 os.system('cls' if os.name == 'nt' else 'clear')
 print ("----------------------------------------------")
 name = input ("Type in your new username: ")
 print()
 print ("This can be changed again if you wish.")
 print ("----------------------------------------------")
 time.sleep(2.5)
def shutdown():
 print ("------------------------")
 print ("| |")
 print ("| Thank you for using |")
 print ("| PyDOS |")
 print ("| |")
 print ("| |")
 print ("| |")
 print ("| Shutting Down... |")
 print ("| |")
 print ("------------------------")
 sys.exit(0)
def end():
 print ("------------------------------------")
 print ("| |")
 print ("|  Thanks for using SimpleCalc!  |")
 print ("| |")
 print ("------------------------------------")
 time.sleep(2)
def calc_a(): print ("----------------------------------")
 num1 = int(input("Enter a number: "))
 num2 = int(input("Enter a number: "))
 print ("----------------------------------")
 answer = num1+num2
 print ("Your answer is:" ,answer)
 print ("----------------------------------")
 time.sleep(3)
 end()
 
def calc_m():
 print ("----------------------------------")
 num1 = int(input("Enter a number: "))
 num2 = int(input("Enter a number: "))
 print ("----------------------------------")
 answer = num1*num2
 print ("Your answer is:" ,answer)
 print ("----------------------------------")
 time.sleep(3)
 end()
 
def calc_s():
 print ("----------------------------------")
 num1 = int(input("Enter a number: "))
  num2 = int(input("Enter a number: "))
 print ("----------------------------------")
 answer = num1-num2
  print ("Your answer is:" ,answer)
  print ("----------------------------------")
 time.sleep(3)
 end()
def calc_d():
 print ("----------------------------------")
 num1 = int(input("Enter a number: "))
 num2 = int(input("Enter a number: "))
 print ("----------------------------------")
  answer = num1/num2
  print ("Your answer is:" ,answer)
 print ("----------------------------------")
  time.sleep(3)
 end()
 
def simplecalc():
 print ("--------------------------")
 print ("| |")
 print ("| Welcome to SimpleCalc |")
  print ("| |")
 print ("| A = Add  |")
 print ("| M = Multiply |")
 print ("| S = Subtract  |")
  print ("| D = Divide  |")
 print ("| Q = Quit |")
 print ("| |")
  print ("--------------------------")
 print ("| |")
 choice = input ("| Choice: |")
 print ("|  |")
 print ("--------------------------")
 if choice == 'a':
  calc_a()
 elif choice == 'm': calc_m()
 elif choice == 's':
  calc_s()
 elif choice == 'd':
 calc_d()
 elif choice == 'q':
 end()
  else:
 print("Invalid specifacation.")
 
def error_message():
 os.system('cls' if os.name == 'nt' else 'clear')
 print ("----------------------")
 print ("| Whoops! |")
 print ("| |")
 print ("| |")
 print ("| It dosent look |")
 print ("| like the app |")
 print ("| exists. |")
 print ("| |")
 print ("|Check and try again.|")
 print ("----------------------")
 time.sleep(3)
os.system('cls' if os.name == 'nt' else 'clear')
print ("---------------------------")
print ("| |")
print ("| |")
print ("| Welcome to PyDOS! |")
print ("| |")
print ("| |")
print ("| |")
print ("| |")
print ("| |")
print ("| Version 3.0 |")
print ("| Alpha Edition |")
print ("| |")
print ("| |")
print ("---------------------------")
time.sleep(3)
print ()
print ("-----------------------------------------------")
name = input ("Enter a name: ")
print ("-----------------------------------------------")
print ("Information has been saved.")
print ()
print ("This data will be used in some applications.")
print ("-----------------------------------------------")
time.sleep(3)
while True:
 os.system('cls' if os.name == 'nt' else 'clear')
 print ("-------------------------")
 print ("| |")
 print ("| |")
 print ("| Loading Home |")
 print ("| Screen |")
 print ("| |")
 print ("| |")
 print ("| |")
 print ("| |")
 print ("| |")
 print ("-------------------------")
 time.sleep(1.5)
 os.system('cls' if os.name == 'nt' else 'clear')
 print ("-------------------------------------------------------------------------------")
 print ("| Username:",name," |")
 print ("-------------------------------------------------------------------------------")
 print ("| |")
 print ("| PyDOS Home Screen - Type in an app below. |")
 print ("| |")
 print ("| Apps: |")
 print ("| |")
 print ("| ChangeName |")
 print ("| Shutdown |")
 print ("| SimpleCalc |")
 print ("| PyWrite |")
 print ("| About |")
 print ("| |")
 print ("| |")
 print ("| |")
 print ("| PyDOS Version 3.0 Alpha (Alpha 1.2 |")
 print ("-------------------------------------------------------------------------------")
 selection = input("Select An App: ")
 command_actions = {
 'ChangeName' : ChangeName,
 'SimpleCalc' : simplecalc,
 'Shutdown' : shutdown
 }
 if selection in command_actions:
 action = command_actions[selection]
 action()
 else:
 error_message()

Updated - 01/05/15or05/01/15Depending where you are.

Whats New?

  • Code updated
  • About app now added.
  • PyWrite under construction, therefore it has been removed from the home screen.
#PyDOS Version 3.0 - Written by Mrfunny744
import time
import os
import sys
import random
def ChangeName(): #Change your display name
 os.system('cls' if os.name == 'nt' else 'clear')
 print ("----------------------------------------------")
 name = input ("Type in your new username: ")
 print()
 print ("This can be changed again if you wish.")
 print ("----------------------------------------------")
 time.sleep(2.5)
def shutdown(): #Shutting down PyDOS
 print ("------------------------")
 print ("| |")
 print ("| Thank you for using |")
 print ("| PyDOS |")
 print ("| |")
 print ("| |")
 print ("| |")
 print ("| Shutting Down... |")
 print ("| |")
 print ("------------------------")
 sys.exit(0)
def end_simple_calc():
 simplecalc()

def end_calc():
 print ("Thank you for using SimpleCalc")
 time.sleep(2)
def calc(operation, num1, num2): #Operation System for SimpleCalc
 if operation == 'a':
 return num1 + num2 elif operation == 's':
  return num1 - num2
 elif operation == 'm':
 return num1 * num2
 elif operation == 'd':
  if num2 == 0:
  raise ValueError('Divide by 0 expection')
 return num1 / num2
 else:
 raise ValueError('Unknown error')
def simplecalc(): #Main screen for SimpleCalc
 print ("----------------------------------------------------------")
 print ("|Welcome to SimpleCalc! You have the following operators:|")
 print ("|A: Add  |")
 print ("|S: Subtract |")
 print ("|M: Multiply |")
 print ("|D: Divide  |")
 print ("|Q: Quit |")
 print ("----------------------------------------------------------")
 choice = input ("Choice: ").lower()[0]
 if choice == 'q':
 end_simple_calc()
 return
 if choice not in "asmd":
 print ("Invalid specification.")
 end_simple_calc()
 return

 try:
 num1 = int(input("Enter a number: "))
 num2 = int(input("Enter a number: "))
 print ("Your answer is:", calc(choice, num1, num2))
 except ValueError as err:
 print(err.args)
 end_calc()
 
def error_message(): #Shown if the app does not exist.
 os.system('cls' if os.name == 'nt' else 'clear')
 print ("----------------------")
 print ("| Whoops! |")
 print ("| |")
 print ("| |")
 print ("| It dosent look |")
 print ("| like the app |")
 print ("| exists. |")
 print ("| |")
 print ("|Check and try again.|")
 print ("----------------------")
 time.sleep(3)
def About(): #About App
 print ("-------------------------------------------------------------")
 print ("| About PyDOS |")
 print ("| |")
 print ("| Version: 3.0 (Alpha 1.3) |")
 print ("| |")
 print ("| Dev Code: 47329257945 |")
 print ("| |")
 print ("| Serial Key: 357-494-626-181 |")
 print ("| |")
 print ("| |")
 print ("| |")
 print ("| |")
 print ("| |")
 print ("| |")
 print ("| |")
 print ("| Thanks for using PyDOS! |")
 print ("-------------------------------------------------------------")
 print ("| |")
 print ("| Please press enter to close app |")
 print ("| |")
 print ("-------------------------------------------------------------")
 input()

os.system('cls' if os.name == 'nt' else 'clear') #This is the startup screen. It only appears once beacuse of the While loop below.
print ("---------------------------")
print ("| |")
print ("| |")
print ("| Welcome to PyDOS! |")
print ("| |")
print ("| |")
print ("| |")
print ("| |")
print ("| |")
print ("| Version 3.0 |")
print ("| Alpha Edition |")
print ("| |")
print ("| |")
print ("---------------------------")
time.sleep(3)
print ()
print ("-----------------------------------------------")
name = input ("Enter a name: ")
print ("-----------------------------------------------")
print ("Information has been saved.")
print ()
print ("This data will be used in some applications.")
print ("-----------------------------------------------")
time.sleep(3)
while True: #This is the home screen
 os.system('cls' if os.name == 'nt' else 'clear')
 print ("-------------------------")
 print ("| |")
 print ("| |")
 print ("| Loading Home |")
 print ("| Screen |")
 print ("| |")
 print ("| |")
 print ("| |")
 print ("| |")
 print ("| |")
 print ("-------------------------")
 time.sleep(1.5)
 os.system('cls' if os.name == 'nt' else 'clear')
 print ("-------------------------------------------------------------------------------")
 print ("| Username:",name," |")
 print ("-------------------------------------------------------------------------------")
 print ("| |")
 print ("| PyDOS Home Screen - Type in an app below. |")
 print ("| |")
 print ("| Apps: |")
 print ("| |")
 print ("| ChangeName |")
 print ("| Shutdown |")
 print ("| SimpleCalc |")
 print ("| About |")
 print ("| |")
 print ("| |")
 print ("| |")
 print ("| |")
 print ("| PyDOS Version 3.0 Alpha (Alpha 1.2 |")
 print ("-------------------------------------------------------------------------------")
 selection = input("Select An App: ")
 command_actions = {
 'ChangeName' : ChangeName,
 'SimpleCalc' : simplecalc,
 'Shutdown' : shutdown
 }
 if selection in command_actions:
 action = command_actions[selection]
 action()
 else:
 error_message()
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