Python Tutorial for Beginners 5: Dictionaries - Working with Key-Value Pairs

[@satyampriyadarshi6314]

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[@1cannon3]

0:07 - Terminology 0:14 - Key/Value pairs definition 0:37 - First example (Student using a dictionary) 0:45 - { }, Dict notation, curly braces, 0:50 - adding elements 1:32 - [ ] Square bracket access of the dict 2:04 - Dict items can be many things, they’re not bound to one “type” 2:14 - Keys can be any immutable data type 2:24 - Example of an Integer being the key 2:44 - Accessing a key that does not exist 3:00 - Alternative to “throwing an error” if a key does not exist 3:05 - Sometimes you will want to return None or a default value if key does not exist 3:09 - .get( ) access of the dict 3:30 - accessing a key that does not exist with the .get method as opposed to [ ] square bracket access 3:40 - Specifying a default value for keys that do not exist 4:01 - Adding a new entry to dictionary 4:30 - Changing/updating values via key access 5:02 - Changing/updating values via .update() method 5:21 - .update() takes in a dict as an argument 5:57 - Deleting a specific key and its value 6:01 - Option 1 for deleting a key and value: del keyword 6:26 - Option 2 for removing a key and value: .pop() method 6:30 - Remember the .pop() method not only removes the item put pops it off or returns it to you 6:35 - Therefore you can recover the popped item with a variable assignment 7:07 - How to loop through all the keys and values 7:13 - Finding out the number of keys in dict with len() function 7:30 - Print all keys with .keys() method 7:39 - Print all values with .values() method 7:47 - Print both keys and values with .items() method 8:07 - Looping is slightly different then lists because dicts are concerned with pairs (Key : Value) 8:33 - How to loop through keys AND values

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Nice, this helps, thanks

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God among men.

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@@andyn6053 diligent note taking. and you make the links by typing the time like 1:02

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You are absolutely a lifesaver! My compsci prof is really smart, but absolutely terrible at explaining things efficiently. I understand more about dictionaries now after your 10-minute video than I previously did after my 3-hour lecture. Thank you so much, I will definitely be subscribing and donating to your patreon in the future! (once covid is over and I have a job again ):)

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Fulfill thy promise and donate, my child.. or face the wrath of our comments

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Thanks! Glad you're learning and finding these helpful!

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You literally explained lists and dictionaries in the simplest terms possible. Thank you so much, I don’t know why professors cannot be like this. You literally gave me more of a clear understanding with the logic and the syntax behind creating dictionary lists with keys and values, as opposed to how my professor does it. Thanks so much. I subscribed. Looking forward to more tutorials.

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how well do you know python now? I'm about to watch the next video after this dictionary one. Gonna continue on but just wondering has it benefited you yet?

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Mr. Schafer, I've never felt so close to learning these concepts after spending so many Python courses... I will be donating for sure.

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The 9 minutes of this tutorial is far better than the 1 hour tutorial I learned from Udemy . Thanks, Corey

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No jokes

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Just from the start of the video I knew you sounded professional. I paused and cake to the comment section and saw a lot of these people learnt. I have just started to actually learn this all. Don’t know any of the languages. If I find this helpful I could probably donate.

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This was one of the most straightforward clear explanations that I have ever seen. I'm trying to get a batchelors in compsci even though I had previously never written a single line of code, and this really helped! Thank you!

[@etc3redsox]

Hey Corey, I know these videos are geared towards beginners like myself - and also a few years old at this point - but it would be helpful to explain how each concept in the tutorials are used in the real world, beyond just printing out values. Hopefully this makes sense! Thank you for the instruction - I appreciate your teaching style

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He kinda does that... The code he used *could* be used in a program that calculates a student's grades or keeps track of them like google classroom. However, it was simplified for the video. Hope this helps

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I have made a notebook to write down the notes and key points . I dont have to suffer in my college learning basics . I can move forward to advance topics So grateful to you and your indepth Explanation

[@kimpierce7825]

You are saving all of my bacon. I didn't know anything about dictionaries before entering into grad school that assumed I was very familiar with them. This is everything. Thank you~~~

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BEST TUTORIAL EVER!!!!!!!!!!!!! glad I found it recommending it to all my friends in college

[@novicetech1]

Thanks again. I actually thought I knew python dictionaries. Now I feel like Jon Snow. I know nothing. I could have saved a bunch on Udemy if I had found you first.

[@MegaJohn144]

I could say exactly the same thing.

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@@MegaJohn144 Udemy is crap

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@@andyn6053 Yes, Udemy sucks. It would be better and cheaper to just buy a book and read it!

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i'm glad i didnt use udemy so fast...

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Teaching like this is gold.

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You can see my playlist too. The channal has Python and R playlist for fundamental tutorials. Source files available too.

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[@inc0nsistentgent893]

dude...this just explained so much to me in such little time. I have been scratching my head for a while over things and not really understanding some looping within these dictionaries, but your explanation makes so much more sense that its actually starting to come together. Thank you.

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Yes, He is. Thank You for praising my Guru! #KeepLearning

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It so funny I put "find me a video that explains sets and dictionaries in py better than my professor " into ChatGPT and it recommended me this Corey's content. So cool.

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Glad to see you with totally refreshed Python Tutorials, Thank you so much Corey!

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The best, most clear and concise description I've found. Good job!

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[@Levinsane]

These were the tricky ones. I'm a python learner and I was stuck in one of my practice problems. Thanks for this great video Corey!

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I swear to god this is the only video on youtube that actually properly explains dictionaries without overcomplicating.

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[@islamalmsarrhad2152]

I've been learning Python for a while, and you are gifted. Many thanks

[@Pythonist]

Here's an advanced tutorial for python dictionaries if you want to learn more: kzbin.info/www/bejne/n36qY2yLpaiFkLM

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Shot and quick; yet covering all the important aspects of the topic. Many thanks.

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Thanks!

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is dataquest free?

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Mega Raph nope

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Currently doing the Python crash course by Coursera and this is just sooooo much better. Amazingly happy I found these videos. Extremely well explained.

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Having studied the Python Institute PCAP course, I'm finding this very helpful and I am experiencing some topics that weren't touched, which are useful for data analysis. Stuffs like union, intersection and difference... I'll definitely be watching till the end and will watch all videos again... Thanks for this...

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Effortless and excellent teaching by a born teacher.

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Corey, you are a brother from another mother. You make stuff really easy to understand.

[@IsSheRG710]

I've struggled to understand syntax but you've been very clear and explained the 'why' of what to type and functions to call perfectly. Thank you so much! I feel like i'm truly learning and getting it!

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Glad to hear that!

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no one cares for certificates knowledge is everything

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Between you and Mosh, I don't know of a better way to learn Python. Thank you so much.

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Thanks!

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Great Video to help me get a grasp on how dictionaries work! keep up the great work, you are a great instructor!!!

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Key = word and Value = Definition. This made the penny drop, I get dictionaries now! Thank you.

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[@coreyms]

Thanks!

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did u get?

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@@-jrstudio6137 Not yet :D

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I was struggling with a practice project in automate the boring stuff where you basically have to make a fantasy inventory. I couldn't figure it out and everywhere I looked I ended up finding solutions like 'print(str(inventory[item]) + ' ' + item)' for this one particular line. Confusing as shit. All I had to do is watch this video and realize it's as easy as writing print(key, value). Maybe there are benefits to the former, but my point is that this channel has been VERY helpful in putting everything in lamens terms... THANK YOU!

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This is so much better than Programming Knowledge.

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Very good tutorial. Thanks to you, I now understand dictionaries better.

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Really great videos! You are way better than my university teacher in explaining things!

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The tutorial you provided is pretty awesome, which is greater than most of the MOOC course, I am looking forward to the python re module tutorial. BTW, your English accent is awesome toooooo, which makes a lot of things that easy understood for the people that come from other language. Thanks

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I really do feel comfortable with dictionaries now! Thanks a lot.

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Thank you Corey for your time and effort. Keep spreading the knowledge.

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he will but you donate

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I really gotta get the hang of Dictionaries, Lists and Tuples. Looks like I have to re-watch this video many times for my brain to finally figure it out. I love your video, very well explained..... :) I just have to memorize it, if my brain decides to wake the hell up some day.....LOL

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Thanks!

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