In this notebook, we will go through the following topics
Join / Merge two lists in python using + operator.
Join / Merge two lists in python using list.extend().
Join / Merge two lists in python using unpacking.
Join / Merge two lists in python using itertools.
Join / Merge two lists in python using for loop.
Let us create random list of numbers using Python random module.
importrandomrandom.seed(4)l1=random.sample(range(0,9),5)l2=random.sample(range(0,9),5)print(l1)print(l2)We can use + operator in Python to add two or more lists as long as the lists are of same type.
l1+l2print(l1)print(l2)We can use the '+' operator on list of characters or strings too.
l1='john ludhi'.split(' ')l1l2='elon musk'.split(' ')l2l1+l2importrandomrandom.seed(4)l1=random.sample(range(0,9),5)l2=random.sample(range(0,9),5)print(l1)print(l2)l1.extend(l2)Let us print list l1
print(l1)We can use list.extend() method on list of strings or characters too.
l1='john ludhi'.split(' ')l2='elon musk'.split(' ')print(l1)print(l2)l1.extend(l2)print(l1)l1='john ludhi'.split(' ')l2='elon musk'.split(' ')mergelist=[*l1,*l2]mergelistimportrandomrandom.seed(4)l1=random.sample(range(0,9),5)l2=random.sample(range(0,9),5)print(l1)print(l2)mergelist=[*l1,*l2]print(mergelist)We can use iterools module to chain two or more lists in Python
iterools.chain(list1,list2,...)
importrandomrandom.seed(4)l1=random.sample(range(0,9),5)l2=random.sample(range(0,9),5)importitertoolsresult=itertools.chain(l1,l2)resultWe can go through the above chain using for loop
importitertoolsforlinitertools.chain(l1,l2):print(l)Or we can convert in to a Python list.
list(itertools.chain(l1,l2))We can chain multiple lists too with itertools.chain()
list(itertools.chain(l1,l2,l2))importrandomrandom.seed(4)l1=random.sample(range(0,9),5)l2=random.sample(range(0,9),5)print(l1)print(l2)foreleminl2:l1.append(elem)print(l1)To learn more about Python append, checkout following notebook
https://www.nbshare.io/notebook/767549040/Append-In-Python/