How to add individual elements of list into another list in python?

Question

For example i have the below list

list1 = [] 
list2 = ['cat', 'tiger']

I wanted to add only the individual elements in the list2 into list1. For eg,

list1.append(['wolf', list2])

And wanted the output like,

[[wolf, cat, tiger]]

But instead I get like,

[['wolf', ['cat', 'tiger']]]

I don't want list2 as such getting appended with the brackets, rather only the elements from the list2. Am i missing something ? Please add your comments. This is just an example from a bigger problem.

rafaelc · Accepted Answer · 2018-08-01 00:32:39Z

3

Use unpacking

>>> list1.append(['wolf', *list2])

[['wolf', 'cat', 'tiger']]

In case python2

>>> list1.append(['wolf'] + list2)

edited Aug 1, 2018 at 0:32

answered Aug 1, 2018 at 0:21

rafaelc

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4 Comments

Desperado Over a year ago

It says File "txtwrp.py", line 52 list1.append(['wolf', *list2]) ^ SyntaxError: invalid syntax

rafaelc Over a year ago

@Desperado your older python version probably has no unpacking yet. Try edited

whackamadoodle3000 Over a year ago

So then it's not a duplicate. It's tagged python 2.7

rafaelc Over a year ago

@ᴡʜᴀᴄᴋᴀᴍᴀᴅᴏᴏᴅʟᴇ3000 fair enough :)

whackamadoodle3000 · Accepted Answer · 2018-08-01 00:24:58Z

1

Try this:

list1=[["wolf"]+list2]

edited Aug 1, 2018 at 0:24

answered Aug 1, 2018 at 0:22

whackamadoodle3000

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