Finding tuples in a list
I'm confused on how to find tuples within a list and remove the tuples as well as the value inside of it in python for example,
mylist = [12, 'Mark', 34.23(45)] Output = [12, 'Mark', 34.23]
If the list had multiple tuples everywhere, how would I go about this? Thanks!
Using functional approach if you have tuples in a list, you canapply a filter with a function which returns true for all except tuples.
my_list = [12, 'Mark', (34.23,45)] filter_obj= filter(lambda x: not isinstance(x,tuple), my_list) #above line is equvalent to (x for x in my_list if not isinstance(x, tuple)) which returns a generator processed_list = list(filter_obj)
Or you can generate a list directly usng list comprehension.
my_list = [12, 'Mark', (34.23,45)] processed_lsit = [x for x in my_list if not isinstance(x,tuple)]
Python, # create an index counter to avoid problems with identical values. result = list(filter(lambda x: x.count(1) > 0, a)) which searches the tuples in list for any occurrence of 1. If the search is limited to the first element, the solution can be modified into: result = list(filter(lambda x: x == 1, a)) share. Share a link to this answer. Copy link. |.
You can just check the type of list elements, and if it is of type tuple, simply remove it. Considering your list to be
mylist = [12, 'Mark', (34.23, 45)] for i in mylist: if type(i) == tuple: mylist.remove(i)
After this code executes,
mylist is updated to
Find an element in a list of tuples, Given a list of tuples, the task is to find all those tuples containing the given element, say n. Examples: Method #2: Using list comprehension. It works only when there are fixed number of elements in every list. Method #1 : Using filter In this solution, there can be variable number of nodes in lists. Finding frequency in list of tuples in Python Using count and map. We apply a lambda function to count through each of the first element in the tuples present in the Example. Output. Given list of tuples : [ ('Apple', 'Mon'), ('Banana', 'Tue'), ('Apple', 'Wed')] The frequency of element is : 2
As Michael said the code is incorrect. But in case you have tuples in a list, for example [12, 'Mark', (34.23,45),21]. This could be removed checking for the "type" of the elements present in the list.
mylist = [12, 'Mark', (34.23,45),21] for elements in mylist: if str(type(elements)) in "<class 'tuple'>": mylist.remove(elements) print(mylist)
Lists and Tuples in Python – Real Python, If you just want the first number to match you can do it like this: [item for item in a if item == 1]. If you are just searching for tuples with 1 in them� Python program to create a list of tuples from the given list having the number and its cube in each tuple Count the sublists containing given element in a list in Python Convert list of tuples to list of list in Python Finding frequency in list of tuples in Python
Finding frequency in list of tuples in Python, You will find them in virtually every nontrivial Python program. Here's what you'll learn in this tutorial: You'll cover the important characteristics of lists and tuples. Python | Count tuples occurrence in list of tuples Last Updated: 03-04-2019 Many a time while developing web and desktop product in Python, we use nested lists and have several queries about how to find count of unique tuples.
Many different types of data container can get mixed up in python. A list can have elements each of which is a tuple. In this article we will take� List comprehension along with zip() function is used to convert the tuples to list and create a list of tuples. Python iter() function is used to iterate an element of an object at a time. The ‘ number ‘ would specify the number of elements to be clubbed into a single tuple to form a list.
Tuples are identical to lists in all respects, except for the following properties: Tuples are defined by enclosing the elements in parentheses (()) instead of square brackets (). Tuples are immutable. Here is a short example showing a tuple definition, indexing, and slicing: >>>
- First line of code is invalid (syntactically incorrect).
- @MichaelButscher as a nitpick, the first line throws a
TypeErrorrather than a
34.23is viewed as a callable.
- @hilberts_drinking_problem Right, thanks.
- tuple in a list is supposed to be like [12, 'Mark', (34.23,45)], not what you typed. is this what you mean?
- Just another alternative
[i for i in my_list if not isinstance(i,tuple)]
- yeah, that'd be simple enough.
- The second approach is using list comprehension . And I would recommend to use
- Instead of using
- And mutating list while iterating is never recommended and shouldn't be.