CODEWITHSUNDEEP
pythonif-statement
user2490630
user2490630

Reputation: 21

Python, How to add more choices in an if statement

I have a python program with an if statement. I want to add more choices to the if statement, how do I do it?

def start():

    print ("A Wise man once said ...")
    o1 = input("\n" + 
      "[L]ook to the poverty of Africa ... [T]HIS HAS YET TO BE WRITTEN")

    if o1 == "L" or "l" or "Africa" or "1":
        print ("\n" + "You decide only a radical solution is viable...")
    else:
        print ("THIS IS NOT WRITTEN YET")

def menu ():

    print ("Menu\n")
    print ("(1)Start")
    print ("(2)Exit\n\n")
    choice = (input('>>'))
    if choice=="1":
        start()
    if choice=="2":
        quit()

menu()

I am trying to make this option next: 

o2 = input (
  "\n" + "[D]ecide to take advantage ..., or T[H]IS HAS YET TO BE WRITTEN?"*)

How should I go about adding more options and choices so that I end up with a story?

Upvotes: 0

Views: 4917

Answers (2)

2rs2ts
2rs2ts

Reputation: 11026

Add a new condition using elif (else if):

if ...
elif o1 == "D" or o1 == "H":
    # your code here
else ...

By the way, you have a syntax error in your conditional statement. Correct it to this:

if o1 == "L" or o1 == "l" or o1 == "Africa" or o1 == "1":

If it makes it easier, look at it this way:

if (o1 == "L") or (o1 == "l") or (o1 == "Africa") or (o1 == "1"):

You should think about the order of operations in your statements. or has higher precedence than ==; additionally, the meaning of "L" or "l" is not what you think it is. 

>>> if "L" or "l":
...    print("foo")
...
foo

Curious, no? Try some of this stuff out for yourself at the interpreter.

Upvotes: 0

DavidJFelix
DavidJFelix

Reputation: 738

There are a couple of good ways to do this, but I would make a class (lets call it "option_node") that uses dictionaries. The class would hold the text of the prompt, then a dictionary that mapped the text options to other option_nodes or a special option node that ends the dialog.

class option_node:
    def __init__(self, prompt):
        self.prompt = prompt
        self.options = {}

    def add_option(self, option_text, next_node):
        self.options[option_text] = next_node

    def print_prompt(self):
        print(prompt)

    def select_input(self):
        for each in self.options:
            print(each)
        while(True)
            user_input = input(">>")
            if self.options.get(in):
                return self.options.get(in)


def main():
    nodes = []
    nodes.append(option_node("Welcome"))
    nodes.append(option_node("Stay Awhile"))
    nodes.append(option_node("That's fine, I don't like you much either"))

    nodes[0].add_option("Hello friend", nodes[1])
    nodes[0].add_option("Hello enemy", nodes[2])

    nodes[1].options = None
    nodes[2].options = None

    current_node = nodes[0]
    while current_node.options is not None:
        current_node.print_prompt()
        current_node = current_node.select_input()

Hope this helps. I can elaborate more if you'd like

Upvotes: 1

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