CODEWITHSUNDEEP
pythonpython-3.xset
Andrew
Andrew

Reputation: 21

Python set: "empty" element, incorrect input

I can't understand how it works. I have input of :

10 2 3 4 8

And simple code 

b = set(input())
print(b)

Returns:

{' ', '3', '1', '2', '8', '0', '4'}

Why I'm getting this ' ' el. and how to get 10 instead of '1' and '0' ?

Upvotes: 1

Views: 276

Answers (2)

JRazor
JRazor

Reputation: 2817

Use filter() with a lambda function to remove the space elements:

>>> filter(lambda x: x is not " ", [" ", "1", "2", " "])
>>> ['1', '2']

Upvotes: 0

zondo
zondo

Reputation: 20336

set() takes an iterable (such as list, tuple, dict, etc.) and makes a set of its items. For example:

x = [4, 5, 6]
y = set(x)
print(y)
#set([4, 5, 6])

A string is iterable, too:

for char in "yay":
    print(char)

#Output:
y
a
y

Therefore, a set can convert a string:

x = "yay there"
y = set(x)
print(y)
#set(['a', ' ', 'e', 'h', 'r', 't', 'y'])

If you want each word, use .split():

b = set(input().split())

Upvotes: 2

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