[Tutor] Input handling?

eryksun eryksun at gmail.com
Tue Sep 18 21:48:46 CEST 2012

On Tue, Sep 18, 2012 at 1:23 PM, Scott Yamamoto
<scott.yamamoto at yahoo.com> wrote:
> 1) expect: raw_input to assign the variable to ""
> 2)No output to stderr; has a loading symbol after hitting enter without input
> (tried both input and raw_input)
> Doesn't affect active interpreter. Only affects the screen with the run option.
> 3)

Except for a bug your code worked for me in Python 2.7.3.

> def simulation():
>   import random
>   from random import randrange
>   from time import sleep

You're not using randrange, plus you should move the imports to the
top of your module.

>   gender = raw_input("Gender: male/female \n")
>   if gender != "male" or "female":
>     gender = "male"

This is the bug. You have the test expression "expr1 or expr2" where
expr1 is "gender != male" and expr2 is "female". A non-empty string is
always True by definition, so your test amounts to "expr1 or True",
which means the "if" block always executes.

>   Mlist = ["Jacob", "Mason", "William", ...]
>   Flist = ["Sophia", "Isabella", "Emma", ...]
>   Llist = ["Smith", "Johnson", "Williams", ...]

Consider moving these lists out of the function. They can all go
nicely in a dict, which you can set as a default argument.

>   username = raw_input("Input your full name: \n")
>   if username == "":
>     if gender == "male":
>       username = random.choice(Mlist) + " " + random.choice(Llist)
>     else:
>       username = random.choice(Flist) + " " + random.choice(Llist)

Using a dict for the names eliminates the need to test gender here. For example:

    import random
    import time

    names = {
      "male": [
        "Jacob", "Mason", "William", "Jayden", "Noah", "Michael",
        "Ethan", "Alexander", "Aiden", "Daniel", "Anthony",
        "Matthew", "Elijah", "Joshua", "Liam", "Andrew", "James",
        "David", "Benjamin", "Logan",
      "female": [
        "Sophia", "Isabella", "Emma", "Olivia", "Ava", "Emily",
        "Abigail", "Madison", "Mia", "Chloe", "Elizabeth", "Ella",
        "Addison", "Natalie", "Lily", "Grace", "Samantha", "Avery",
        "Sofia", "Aubrey",
      "last": [
        "Smith", "Johnson", "Williams", "Jones", "Brown", "Pavis",
        "Miller", "Wilson", "Moore", "Taylor", "Anderson", "Thomas",
        "Jackson", "White", "Harris", "Martin", "Thompson", "Garcia",
        "Martinez", "Robinson",

    def simulation(names=names):
        print "Welcome to The World."
        print "Now Loading..."
        # Intro page
        gender = raw_input("\nGender [male|female]:\n").strip()
        if gender not in ("male", "female"):
            gender = "male"
        username = raw_input("Input your full name:\n")
        if not username:
            username = " ".join(
                random.choice(n) for n in (names[gender], names["last"]))
        print "\nUsername: %s. Gender: %s." % (username, gender)

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