How do you sort a list by value in Python?

How do you sort a list by value in Python?

To sort a dictionary by value in Python you can use the sorted() function. Python’s sorted() function can be used to sort dictionaries by key, which allows for a custom sorting method. sorted() takes three arguments: object, key, and reverse.

How do you sort a list on the basis of another list in Python?

How to sort a list based on another list in Python

  1. list1 = [“a”, “b”, “c”]
  2. list2 = [2, 3, 1]
  3. zipped_lists = zip(list2, list1) Pair list2 and list1 elements.
  4. sorted_zipped_lists = sorted(zipped_lists) Sort by first element of each pair.
  5. sorted_list1 = [element for _, element in sorted_zipped_lists]
  6. print(sorted_list1)

How do you sort a list by index in Python?

The function sorted() is used to sort a list in Python. By default, it sorts the list in ascending order. The function itemgetter() from the operator module takes an index number as a parameter and returns the element from the data set placed at that index number.

How do I sort two lists based on one in Python?

Use zip() and sorted() to sort two lists together

  1. list1 = [“c”, “b”, “d”, “a”]
  2. list2 = [2, 3, 1, 4]
  3. zipped_lists = zip(list1, list2)
  4. sorted_pairs = sorted(zipped_lists)
  5. tuples = zip(*sorted_pairs)
  6. list1, list2 = [ list(tuple) for tuple in tuples]
  7. print(list1)
  8. print(list2)

How do I sort a list list?

Use sorted() with operator. itemgetter() to sort a list of lists. Call sorted(iterable, key=k) with the list of lists as iterable and operator. itemgetter(i) as k to sort iterable by the i -th element of each inner list.

How do you sort an array by value in Python?


  1. STEP 1: Declare and initialize an array.
  2. STEP 2: Loop through the array and select an element.
  3. STEP 3: The inner loop will be used to compare the selected element from the outer loop with the rest of the elements of the array.
  4. STEP 4: If any element is less than the selected element then swap the values.

How do you sort and compare two lists in Python?

How to compare two lists in Python?

  1. Using list. sort() and == operator. The list.
  2. Using collections. Counter() This method tests for the equality of the lists by comparing frequency of each element in first list with the second list.
  3. Using == operator. This is a modification of the first method.

How do you sort two variables in Python?

Use sorted() and a lambda expression to sort a list by two fields. Call sorted(a_list, key = k) with k as lambda x: x[i], x[j] to sort list by the i -th element and then by the j -th element.

How do you sort a list by second value?

Use a lambda function as an argument to sort() to sort a list of tuples by the second value. Call list. sort(key=None) with list as a list of tuples and key set to lambda x: x[1] to sort list by the second element of each tuple.

What’s the difference between sort and sorted in Python?

The sort () method is a list method and thus can only be used on lists. The sorted () function works on any iterable. The sort () method is a list method that modifies the list in-place and returns None.

How to get sorted index list in Python?

Note that the sorted index list can also be gotten using numpy.argsort (). Another alternative, combining several of the answers. zip, sort by the second column, return the first column. This is an old question but some of the answers I see posted don’t actually work because zip is not scriptable.

How to sort two lists using zip in Python?

Approach : 1 Zip the two lists. 2 Create a new, sorted list based on the zip using sorted (). 3 Using a list comprehension extract the first elements of each pair from the sorted, zipped list. More

What’s the difference between sorted and sorted in Java?

The sorted () function works on any iterable. The sort () method is a list method that modifies the list in-place and returns None. In other words, the sort () method modifies or changes the list it is called on, and does not create a new list. T h e sort () method has two optional parameters: the key parameter and reverse parameter.

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