将单个整数输入转换为python中的列表

Question

I am looking for a single line command in python to convert an integer input to list. The following is the situation.

mylist=[]
mylist=list(input('Enter the numbers: '))

The above line works perfectly if i give more than one number as input. Eg 1,2,3 . But it gives Error when i give only a single digit entry. Eg: 1 . Saying it cannot convert an integer to list. I don't want to run a loop asking user for each input. So i want a one line command which will work for one or more digits input given by user separated by commas.

Thanking you, -indiajoe

Answer 1

You should use raw_input and convert to int with a list comprehension:

user_input = raw_input('Enter the numbers: ')
my_list = [int(i) for i in user_input.split(',')]

From the offical documentation : raw_input reads a line from input, converts it to a string (stripping a trailing newline), and returns that.

Answer 2

I think that the simplest thing that you can do is:

mylist = map(int, raw_input('Enter the numbers: ').split(','))

But it's nearly the same that using a list comprehension.

Answer 3

input eval() 's what you type. So, when you type 1,2,3 , the result is a tuple ; when you type 1 , the result is an int . Try typing 1, instead of 1 . Note that your first line ( mylist=[] ) is unnecessary.