How do you access a specific element in a list in python?

I have a list

list = [['vegas','London'],['US','UK']]

How to access each element of this list?

CharlesB

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asked May 16, 2012 at 6:29

2

I'd start by not calling it list, since that's the name of the constructor for Python's built in list type.

But once you've renamed it to cities or something, you'd do:

print[cities[0][0], cities[1][0]]
print[cities[0][1], cities[1][1]]

answered May 16, 2012 at 6:33

sblomsblom

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It's simple

y = [['vegas','London'],['US','UK']]

for x in y:
    for a in x:
        print[a]

answered Nov 11, 2017 at 22:13

AutomationNerdAutomationNerd

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Learn python the hard way ex 34

try this

animals = ['bear' , 'python' , 'peacock', 'kangaroo' , 'whale' , 'platypus']

# print "The first [1st] animal is at 0 and is a bear." 

for i in range[len[animals]]:
    print "The %d animal is at %d and is a %s" % [i+1 ,i, animals[i]]

# "The animal at 0 is the 1st animal and is a bear."

for i in range[len[animals]]:
    print "The animal at %d is the %d and is a %s " % [i, i+1, animals[i]]

Mel

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answered Mar 1, 2017 at 11:20

1

Tried list[:][0] to show all first member for each list inside list is not working. Result will be the same as list[0][:].

So i use list comprehension like this:

print[[i[0] for i in list]]

which return first element value for each list inside list.

PS: I use variable list as it is the name used in the question. I will not use this as a variable name since it is the basic function list[] in Python.

answered Apr 14, 2020 at 4:17

anugrahandianugrahandi

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Recursive solution to print all items in a list:

def printItems[l]:
   for i in l:
      if isinstance[i,list]:
         printItems[i]
      else:
         print i


l = [['vegas','London'],['US','UK']]
printItems[l]

answered Mar 1, 2017 at 11:28

KajalKajal

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0

The most basic data structure in Python is the sequence. Each element of a sequence is assigned a number - its position or index. The first index is zero, the second index is one, and so forth.

Python has six built-in types of sequences, but the most common ones are lists and tuples, which we would see in this tutorial.

There are certain things you can do with all sequence types. These operations include indexing, slicing, adding, multiplying, and checking for membership. In addition, Python has built-in functions for finding the length of a sequence and for finding its largest and smallest elements.

Python Lists

The list is a most versatile datatype available in Python which can be written as a list of comma-separated values [items] between square brackets. Important thing about a list is that items in a list need not be of the same type.

Creating a list is as simple as putting different comma-separated values between square brackets. For example −

list1 = ['physics', 'chemistry', 1997, 2000];
list2 = [1, 2, 3, 4, 5 ];
list3 = ["a", "b", "c", "d"]

Similar to string indices, list indices start at 0, and lists can be sliced, concatenated and so on.

Accessing Values in Lists

To access values in lists, use the square brackets for slicing along with the index or indices to obtain value available at that index. For example −

#!/usr/bin/python

list1 = ['physics', 'chemistry', 1997, 2000];
list2 = [1, 2, 3, 4, 5, 6, 7 ];
print "list1[0]: ", list1[0]
print "list2[1:5]: ", list2[1:5]

When the above code is executed, it produces the following result −

list1[0]:  physics
list2[1:5]:  [2, 3, 4, 5]

Updating Lists

You can update single or multiple elements of lists by giving the slice on the left-hand side of the assignment operator, and you can add to elements in a list with the append[] method. For example −

#!/usr/bin/python

list = ['physics', 'chemistry', 1997, 2000];
print "Value available at index 2 : "
print list[2]
list[2] = 2001;
print "New value available at index 2 : "
print list[2]

Note − append[] method is discussed in subsequent section.

When the above code is executed, it produces the following result −

Value available at index 2 :
1997
New value available at index 2 :
2001

Delete List Elements

To remove a list element, you can use either the del statement if you know exactly which element[s] you are deleting or the remove[] method if you do not know. For example −

#!/usr/bin/python

list1 = ['physics', 'chemistry', 1997, 2000];
print list1
del list1[2];
print "After deleting value at index 2 : "
print list1

When the above code is executed, it produces following result −

['physics', 'chemistry', 1997, 2000]
After deleting value at index 2 :
['physics', 'chemistry', 2000]

Note − remove[] method is discussed in subsequent section.

Basic List Operations

Lists respond to the + and * operators much like strings; they mean concatenation and repetition here too, except that the result is a new list, not a string.

In fact, lists respond to all of the general sequence operations we used on strings in the prior chapter.

Indexing, Slicing, and Matrixes

Because lists are sequences, indexing and slicing work the same way for lists as they do for strings.

Assuming following input −

L = ['spam', 'Spam', 'SPAM!']

Built-in List Functions & Methods

Python includes the following list functions −

Python includes following list methods

How do you access individual elements in a list in Python?

How do you select a specific item in a list Python?

How we can access elements of list?

How do I print a specific element in a list Python?