CODEWITHSUNDEEP
pythonpython-3.x
Kaelan Renaud
Kaelan Renaud

Reputation: 13

Python Command Program

I am currently trying to make a program that will run commands. I want to have it so there is a list of commands and the program will take my input command, check to see if its in the list, and then run the command if it does. and if not I want it to print out Invalid Command.

    while 1 == 1:
    command = input("Daisy: ")
    commands = ['cmd', 'google']
    if command == 'cmd' or 'google':
        if command == 'cmd':
            os.system("start")
        elif command == 'google':
            webbrowser.open_new('google.ca')

this is currently what i have. I already made the list but youll notice in my if statement i want it to check to see if it equals cmd or google. I am going to have a lot more commands then this so in the nature of making things look pretty, i wanted to know if there was a way i could have the command check the list, run the command if its in the list, and if its not, print invalid command.

Upvotes: 0

Views: 49

Answers (3)

Federico Bassini
Federico Bassini

Reputation: 149

I did a similar program, a little console, to help me on the developments.

the solution is a if-elif-else statement because every command is different to the other. So:

 while 1 == 1:
    command = input("Daisy: ")
    if command == 'cmd':
        os.system("start")
    elif command == 'google':
        webbrowser.open_new('google.ca')
    elif command == 'new command':
        # put here a new command
    else:
        print('Invalid Command')

Array commands and the first if statement aren't necessary because now there is "else" that intercept all invalid commands.

if you want see my code there is a link: DevUtils at line 38 i manage commands.

Upvotes: 0

Michael B
Michael B

Reputation: 13

I think the most versatile way would be using a dictionary and the exec funktion

commands = dict()
commands['google'] = "webbrowser.open_new(\"google.ca\")"
commands['cmd'] = "os.system(\"start\")"

if key in commands:
    exec(commands[key])

Can't test this right now but it should work

Upvotes: 0

Peter Smit
Peter Smit

Reputation: 1644

You can create a function per command, and store the name for command and function to be executed in a dictionary. Like this:

def open_google():
    webbrowser.open('google.ca')

commands = {'open_google': open_google}

while True:
    # Get input here
    if command in commands:
        commands[command]()

This way you only have to create new functions, and add them to the dictionary. The logic in the main loop remains the same.

Upvotes: 3

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