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#!usr/bin/env python
# hello2.py -- the traditional hello world program, cli version


,,,
This program greets the user and asks him for a name, 
but only if the name has not been specified on the
command line interface as its first argument. Then
it welcome the user with a nice personalized message.

Call this program either as:
	hello2.py "John Doe"
or as 
	hello2.py

,,,


import sys

def say_hello():
	"Say hello to the world!"
	print "Hello, World!"

def ask_user_from_cli():
	"Fetch user name from the command line interface"
	if len(sys.argv) > 1:
		return sys.argv[1]
	else:
		return None

def ask_user_interactively():
	"Ask user for his name"
	return raw_input("What's your name? ")

def greet_user(name):
	"Send user a personalized greeting"
	print "Nice to meet you,", name

def main():
	"This is the main program"
	say_hello()
	name = ask_user_from_cli()
	if name is None:
		name = ask_user_interactively()
	greet_user(name)

if __name__== '__main__':
	main()

Code: Alles auswählen

''' 
This program greets the user and asks him for a name,
but only if the name has not been specified on the
command line interface as its first argument. Then
it welcome the user with a nice personalized message.

Call this program either as:
    hello2.py "John Doe"
or as
    hello2.py
'''