Python Programming Tutorial - 20 - Dictionary

[chetkauffman]

you should be teaching about placeholders so people get in the habit of using them and not having to worry about remembering spaces while printing variables

classmates = {'tony':'cool but smells', 'emma':'sits behind me', 'lucy':'asks too many questions'}

for k, v in classmates.items():
    print('{} {}'.format(k, v))


instead of just printing k + v you use {} in place  of each variable and can place the space in between. you just have to follow the closing ' with .format(each var that will fill the placeholders)

just a thought. good tutorials

[GAment_]

These are fast, fun, entertaining, and informative. Can't thank you enough!

[domagojradicevic]

awesome
people={'ivan':10, 'anton':15, 'ivana':24, 'joso':23}

for k, v in people.items():
if v<18:
print(k, "is child")
else:
print(k, "is adult")

[stonedgamer]

I like watching Bucky's videos while high on my sleep meds at night while on my painkillers. its interesting

[soumyait]

Hey NewBoston...
I have recently started working with python.. and your tutorials are big help..

just sharing something I tried myself, instead of using 'k' and 'v', keeping the motive same as printing them.. I used below code.. which worked in the similar manner -

classmate = {'Tony':'he is good guy', 'Nandi':'she is lazy', 'Ram':'he is studious', 'Mike':'he sleeps alot'}
print(classmate)

for c in classmate:
print(classmate[c])

#this for loop give same output as we get using k and v... also noticed few comments where people speaking about sorting order.. well mine was not sorted and it was printed in the order they were declared.

[atulchavan]

print(k, v) will also work, and it doesnt require to add any white spaces to your strings

[luaentertainment]

In Lua we call these "tables". And they're a crucial concept to understand.

[dannymorckjensen]

Cool thing how you pointed out the keys and values. Got more "visual" and logic.

[jeffarias]

For the loops part you don't need to put + between the variable just a comma then dont need to do the spacing

[syedmishkatulhaque]

Age = {'Noboni': '13', 'Ziad': '17', 'Affan': '7', 'Bithi': '28', 'Sazib': '40'}

for k, v in Age.items():
v=int(v)
if v>= 50:
print(k + ' is senior')
elif v >= 18:
print(k + ' is adult')
elif v >=10:
print(k + ' is kid')
else:
print(k + ' is child')

[hanniballecter]

Can we please have a clear and concise explanation why the '.items' is used after classmates? Bucky doesn't mention it and it is not at all intuitive to a beginner. This is the first time this scripting technique has been used in this tutorial series, and this is a tutorial for *beginners*

[elecktromaestimmy]

in what order is it printed
i can't see any logic behind it.. LIFO of FIFO ?

[roemerblom]

why did it print out lucy first while tony was first?

[syedmishkatulhaque]

it works better if you write
print(k, v) instead of print (k+v)

[maxguichard]

Just wandering can you unpack dictionaries? like def Checkmate(*Classmates). How would that work? Would it like put the value or the key?

[yameischeda]

Hello! I don't understand in the for loop why you have to add .item() to classmates so classmates.item().
If you just leave it at For k, v in classmates is that not enough??

[rajshah]

took me a month to learn all these List APIs and File writing in Java, took me less than an hour in python

[expeditionquran]

I appreciate all the effort you put into these videos. Thank you very much, it was really helpful. I have a question about numpy. How can i use numpy in my eclipse, i downloaded it but i dont know how to set it up in eclipse. Thanks for any help

[agxryt]

a little confused by the use of {} when creating the dictionary, and [] when adding searching a specific key in the dictionary, and why () does not work.

eg:
classmates = {'tony':'cool but smells', 'mark':'cool but loud', 'lucy':'probably a vs. print(classmates['mark']) vs. print(classmates('mark'))

anyone able to explain this?

[shaanbeentv]

so is the key is x=key[] 32 bit quantum core value in python that returns hydrogen C3 bits when executed in DNA Mode or quantum core files with data type that supports ecommerse values for stock?