ALL 11 Dictionary Methods In Python EXPLAINED 

God, I love dictionaries in python

You can specify a default value for pop as well, to avoid the KeyError: pop(key, default)

3 years programming in Python. Almost all my implementations in for loop were just like if key in d.keys(): d[key] = ["value"] else: d[key].append("value") Where each search for key is O(n). If only I had known about fromkeys() before! That would simplify my code to complexity O(n) on the creation and just O(1) for searching and updating, like that: keys = ("abc", "def") d = d.fromkeys(keys, []) d["abc"].append("value") Thank you very much for this video! This was very helpful!

Thank you. As always with your stuff, this is a great "Introduction to...": complete, but succinct and clear. And nicely indexed so people can skip over methods they're already familiar with. Since you asked ... I'm still fairly new to Python, so there were a couple I'd never heard of, and a few that I'd *only* heard of and never learned. I'll definitely be using a few more them now that you've introduced me.

thanks a lot for the tutorial👍 I find it very informative but it's still hard for me to work with dictionaries

Great channel, learned about you via Shorts... Re: popitem: (a) popitem removes the *last* item, but the last item is defined by the last item inserted in the dict. The example in the video uses items that happen to be in numerical order by key. Such an example could give the impression that popitem will always remove the key with the largest value; however, if the example was users: dict = {0: 'Mario', 2: 'James', 1: 'Luigi'}, popitem would remove the last item entered, which is 1: 'Luigi'; (b) prior to Python 3.7, popitem removed a *random* item, because only in 3.7+ were the order of dict items preserved by their order of entry.

What is the difference between .items() and .__dict__() method?

Can you come up with Data Structures and Algorithms?

Great one man, I knew every of those, but very helpfull informational video

Perhaps worth adding: the del operation to remove item without returning the value. In your example dict it would be: del users[2]

Bro, have you heard about the flet framework (flutter for python), can you create an playlist that goes through all basic and intermediate level contents , please, because I tried searching tutorials for flet but didn't get what I wanted, and sorry if I said anything bad, bcoz English is not my mother tongue

Is it possible to find an intersection of dictionaries, i. e. the keys common in both ones?

Are you using the colon instead of an equals sign?

finally learned how to use dictionaries (been a computer science major for 2 years)

Fantastic vid - much appreciated

what IDE you use ? yours look minimilistic.

I think you glossed over setdefault. setdefault is useful when initializing a dict(). it returns the newly created key/val pair, and you can modify if right there.: mydict[key]=mydict.setdefault(key,0)+=1 or mydict[key]=mydict.setdefault(key,[]).append(val) .setdefault closer to behavior you get with defaultdict then comparing to get()

Pretty good list. You did miss that pop has a default parameter available. Maybe it's a cultural thing, but the character "|" is just called pipe, not pipeline.

I'd lioke to add that popitem() is like item(), but removes the pair from the dict. So, you can use the key/value pair in a loop and (may) have an empty dict after that.

Very interesting. The method 'fromkeys' did not work as expected and produced a sytax error. The code --------------- people: list[str] = ['Mario', 'Luigi', 'James'] users: dict = dict.fromkeys(people, __value:'Uknown') print(users) -------------- The error has to do with the use of ':'.

I made a dictionary to try to make a program that helps me with learning French. It is formatted like this, Vocab = { "manger": { "translation": "to eat" "conjugations": { "je" : "mange", "tu" : "mange", ect.... I am trying to make it asks me the translation of a random word first if I get to right it says correct, wrong it says incorrect and shows me the fight translation. followed by each of the conjugations separately either saying correct or showing me the answer if incorrect. How would I go about starting that? New to python

It would be nice to know the average time complexity of these methods.

Great video, Thank you!

I was just curious.....why did you remove the names when you used the dict.copy() method?

Educational and instructive ...

Very useful. Thanks

It got me thinking. Since when Python started adding linux-like syntax in it? The match-case syntax also comes from bash scripting, so there is anything else on that avenue that was added recently?

I learned something new, |= thanks

What colour theme are you using? Thank you!

Hmm... the key order. What makes them come out in sequence?? Or, is that built into print?

Thank you.

I have one question.. Why we can't use dictionary or list in key.. But can use tuple or set in dictionary keys

Good tuto bro

great video

Hi Are you aware of self healing selenium scripts? Can you explain the concept of self healing and how is it even possible!? Because we find element on web page using a locator if that element isn't found we get error. How can self healing find that locator. For eg. An element found by //input[@name=email] if not found, can automatically guess the element was updated in next build as //input[@name=mailing-addrress] using self healing approach.. it would be great if you can help us understand that

I thought the dictionary is not sorted so there should not be a last item. Is it like random?

I think it would have been useful to also include the __getitem__ method of the dictionaries.

I love dicts!

Thanks god, thanks

users : dict = {0:"Mario", 1:"Luigi", 2:"James"} popped : str = users.pop(2) popitems : str = users.popitem() print(users) copied : dict = users.copy() copied[0] = "!!!" print(copied) sample_dict: dict = {0: ['a', 'b'], 1:['c',"d"]} my_copy : dict = sample_dict.copy() my_copy[0][0] = "???" print(my_copy) print(users.get(0)) print(users.get(3, "Not found")) print(users.setdefault(4, "Brownstone")) copied.clear() people: list[str] = ["Mario", "Luigi", "James"] users: dict = dict.fromkeys(people) print(users) users.items() users.values() users.keys() users.update({4:"Bob"}) print(users)

cool |= cool

Hello everyone is anyone called Mulher brava here ?

Dude I appreciate your channel a lot, because I learned a lot, but marking the type of simple global variables is annoying and demolishes the concept of a dynamically typed language. I can understand in classes or functions to make them easier to use, but in simple obvious variables?

Watch out leetcode! Your end is nigh!

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