CODEWITHSUNDEEP
pythonlistinteger
latgarf
latgarf

Reputation: 511

How to convert a single number into a single item list in python

My solution:

>>> i = 2
>>> list1 = []
>>> list1.append(i)
>>> list1
[2]

Is there a more elegant solution?

Upvotes: 32

Views: 100398

Answers (5)

nsaura
nsaura

Reputation: 331

As it has already been said, you can write for a single value

    list1 = [i]

This is a "0th order" list comprehension which turns out to be a relevant and powerful python tool.

Check https://docs.python.org/2/tutorial/datastructures.html

Upvotes: 0

Hadi Khan
Hadi Khan

Reputation: 587

mylist = [i]

This will create a list called mylist with exactly one element i. This can be extended to create a list with as many values as you want: For example:

mylist = [i1,i2,i3,i4]

This creates a list with four element i1,i2,i3,i4 in that order. This is more efficient that appending each one of the elements to the list.

Upvotes: 11

LinkBerest - SO sold our work
LinkBerest - SO sold our work

Reputation: 1311

is it just a single assignment or is this within another construct? if just an assignment:

list1 = [2,] #This is equivalent to list1 = [2], I add the comma out of habit (but either works)
#if construct it depends but this assigns the variable as the list element
list1 = [i] #is fine

Upvotes: 1

Hypaethral
Hypaethral

Reputation: 1477

To place something inside of a list, simply wrap it in brackets, like so:

i = 4
print( [i] )

or

iList = [i]
print( iList )

Run a working example here http://www.codeskulptor.org/#user39_XH1ahy3yu5b6iG0.py

Upvotes: 4

John1024
John1024

Reputation: 113824

This is just a special case:

list1 = []

You can put the lists contents between the brackets. For example:

list1 = [i]

Upvotes: 32

Related Questions