I am trying to shorten my code by putting input directly into a list. This is my code:
n = input('Enter: ')
lista = [n[i] for i in range(len(n))]
I am trying to put this in one line. I tried couple of variations but none of them worked. Is this even possible to do in python ?
>>> lista = list(input("Enter: "))
Enter: hello
>>> lista
['h', 'e', 'l', 'l', 'o']
Or, if you insist that you absolutely must use a list comprehension for some reason,
>>> lista = (lambda n: [n[i] for i in range(len(n))])(input("Enter: "))
Enter: hello
>>> lista
['h', 'e', 'l', 'l', 'o']
Or, if all you actually wanted was to put the input into a list as a single element:
>>> lista = [input("Enter: ")]
Enter: hello
>>> lista
['hello']
You don't even need to use a comprehension with range(len(n)) here since you're just creating a list out of each element in the string returned from input.
A one-line equivalent is simply using:
lista = list(input('Enter: '))
or, alternatively, for Python >= 3.5:
lista = [*input('Enter: ')]
What about:
letters = [letter for letter in input('Enter: ')]
Try it out:
>>> letters = [letter for letter in input('Enter: ')]
Enter: hello
>>> letters
['h', 'e', 'l', 'l', 'o']
Or if you enter a sentence and want individual words, use input('Enter: ').split().
Another useful way to parsing arguments from the command line to the python script is the package argparse.
The following example shows you how to parse arguments in a list:
import argparse
parser = argparse.ArgumentParser(description='Parse Arguments')
parser.add_argument('--to-list', nargs='+', help='read Arguments as a list')
args = parser.parse_args()
list = args.to-list
The usage would be:
python parseArguments.py --to-list Hello World !
>>> list
['Hello','World', '!']
inputin the code as python 2.7 AND 3.x