Searching and Filtering List of Tuples in Python

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I have a list of tuples, I'm trying to remove duplicates based on minimum value :

a_list = [("1","111","15"),("2","111","10"),("3","111","5"),("4","112","40"),("5","112","10")]

Output : 
id id_client value2
1   111         15
2   111         10
3   111         5
4   112         40
5   112         10

Required Output
id id_client value2
3   111         5
5   112         10

I tried everything but couldn't get it.

Try the following code:

# Input list
a_list = [("1","111","15"),("2","111","10"),("3","111","5"),("4","112","40"),("5","112","10")]

# Sort the list by the third value (index-2)
sorted_list = sorted(a_list, key=lambda x: int(x[2]))

# Track visited and repeated elements to only add the first tuple(x) with the smallest x[1]
visited = []

# New list to only append unique tuples
new_list = []

for i in sorted_list:
    if i[1] not in visited:
        new_list.append(i)
        visited.append(i[1])
print(new_list)

Output:

[('1', '111', '15'), ('4', '112', '40')]

How to get the first element of each tuple in a list in Python, How do you access elements in a list of tuples in Python? Sometimes, while working with Python list, we can have a data set that consists of tuples and we have a problem in which we need to search the element in Nth column of list. This has it’s applications in web development domain.

Try this:

from itertools import groupby

new_l = []
for k,v in groupby(list, lambda x: x[1]):
    new_l.append(min(filter(lambda x:x[1]==k, list), key=lambda x:int(x[2])))

new_l will be your output.

Note that do not use pre-defiend names like list as a variable name. those names are mean something in python.

Python Lists of Tuples, How do I find an item in a list Python? I am new to Python and the easiest way to filter the tuples that I could discover was with the following list comprehension: tuples_filtered = [(x,y) for (x,y) in tuples if x in filter] The resulting filtered list looks like:

Another possibility without importing, just because comprehension is fun:

lst = [("1","111","15"),("2","111","10"),("3","111","5"),("4","112","40"),("5","112","10")] 

[min((x for x in lst if x[1] == client), key=lambda x: int(x[2])) for client in {row[1] for row in lst}]

gives

 [('5', '112', '10'), ('3', '111', '5')]

Python - Tuples, Method #1 : Using filter In this solution, there can be variable number of nodes in lists. filter_none. edit close. play_arrow. link brightness_4 code  If you’re searching for a fully matching tuple among a list of tuples, you could simply use the in operator to implicitly call the list type’s __contains__() special method. If (1,2) in [(0,1),(2,3),(1,2),]: pass If you’re looking for some match inside one of the nested tuples, then you’d iterate over the calls to in

Python, Try the following code: # Input list a_list = [("1","111","15"),("2","111","10"),("3","​111","5"),("4","112","40"),("5","112","10")] # Sort the list by the third  In this post we will talk about creating Python Lists of Tuples and how they can be used. Python Lists. Lists in Python are simply an array. Here is a basic list of my favorite WoW Classes:

Searching and Filtering List of Tuples in Python, If you're searching for a fully matching tuple among a list of tuples, you could simply In PyCharm Python, what are the commands for comparison two tuples and also def search_tuple(tups, elem):; return filter(lambda tup: elem in tup, tups)  Lists and tuples are arguably Python’s most versatile, useful data types.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.

How to search a list of tuples in Python, A demonstration of common Python list and tuple manipulations Here we demonstrate the built-in filter and map functions for filtering and  Change Tuple Values. Once a tuple is created, you cannot change its values. Tuples are unchangeable, or immutable as it also is called. But there is a workaround. You can convert the tuple into a list, change the list, and convert the list back into a tuple.

Comments
  • Show what you tried and what went wrong. And I guess your first "Output" is actually "Input"?
  • I answered a question like this earlier today: stackoverflow.com/questions/58369762/… (Except, instead of appending to the list, just keep hold onto the minimum value.)
  • It's not recommended to use list as a name.
  • Thank you so much , worked perfectly, Would you please explain this line sorted_list = sorted(a_list, key=lambda x: int(x[2])) ?
  • Sure. It sorts the list by the third element x[2] of the tuples inside. You can use key attribute of sorted function for such operations. Simply provide a function to the key attribute and it will do the rest. Check out this more detail here
  • Thank you so much , worked perfectly, I changed list to a_list in the question above