![), you can use zip(nums[], nums[1::2]) to get ((0, 1), (2, 3), (4, 5)) - 10 Python Tips and Tricks For Writing Better Code](https://img.youtube.com/vi/C-gEQdGVXbk/mqdefault.jpg)
), you can use zip(nums[], nums[1::2]) to get ((0, 1), (2, 3), (4, 5))
) - ternary operator ;
) Ternary Conditionals -
I have a question though, why can't you write x = int(condition) at ?
a better way to write it is print(int(conditional))
x = int(condition) # knowingly missing the point
) - Underscores in Numeric Literals + about f-string;
) Underscore Placeholders -
this will be fantastic for my code. Thanks Corey!
@ it is not practical because often your '0' and '1' is a multiple line of code unlike this example where they are simple 0 or 1
@ you don't need the underscores. Example......(price = 1000) print (f'Your price is ${price:,}') will print $1,000. Maybe in the older version you had to have it but now you don't
:o Amazing! Just... wow. Thank you!
Note that syntax is only valid in Python 3.6 and later.
when I use : print(f'{total : . }') , It raise an error : ValueError: Format specifier missing precision.
) Context Managers -
) - context manager ;
Because the file is being opened read-only, there is really no harm in this. Because CPython does reference-counting, the file is automatically closed anyway, soon as the last reference to it is dropped.
questions (using the example you used for the file reading thing around ):What does f mean?what does it mean when you use f. ?what does the ' mean?
) - enumerate function ;
) Enumerate -
At you could have deleted the line word_count = len(words) and placed print(len(words)) on the following line.
On you Chan do it in Java Like this:for(String name : names) {}
what about this:
But I use this:list = ['a', 'b', 'c']for i in list:print(list.index(i), i)
) Zip -
Although I didn't know about zip () and it does seem pretty helpful, it looks like you could get an equally organized structure if you use a dictionary instead since the two lists are inherently related and do something like:for name, hero in dictionary_name.items():In any case, great video and I definitely managed to learn some things
) - zip function ;
For the example in , I'm pretty sure noone would ever do that. If your goal is to write simple, easy to read code your best bet probably is:
hi, Thank you for this lesson, is very useful. but I have a question for . print(f'{name}is actually {hero}'), i mean if just use--print(name, "is actually", hero) is not the same? why need to using format? thank you
This was the moment that I learned the truth...I didn't ask for this!
very informative tips. thank you so much. a tip if someone need to convert two lists of same length into dictionary then we can also use the zip function mydictionary=dict(zip(listA,listB)).
I have a question about names of lists in . When you run it Python knows that list 'universes' correspond to the 'universe' call? Because you have different words in the name of the list and in print function argument.
) Unpacking -
) - unpacking tuples (use asterisk and underscore);
The parentheses are not needed. In fact,a, b = b, ais the most elegant code swapping two values.
@a, _ = (1,2)print(a)
Great video! I just had one question, at why does c return a list and not a tuple?
same things i want to do in nested json is it possible?
) Setattr/Getattr -
) - getting and setting attributes to object (setattr, getattr );
As a Java dev I feel uncomfortable at ^^
wait you printed the variable first, which was set to first_key which meant 'first', but when you printed it out you got the other one 'Corey' ???
For the topic you talked about roughly at :If you have multiple attributes like this you don't neep to loop over them. It's easier to use <class>.__dict__.update(<attributedictionary>).
the same can be achieved by setattr(person, **person_info)
- Why all the orchestration, it's much easier to just update `__dict__` of your `person` instance, e.g. `person.__dict__.update(person_info)` instead of the whole `for..in -> setattr(...)` loop.
) - getpass instead input (read from keyboard) ;
) GetPass -
I found that using the SublimeREPL plugin works out fairly well when I need to use inputs and will have that open in another tab in the application.
) Python dash m -
) - run python with dash m in terminal (python -m ...);
) - built-in functions (help, dir etc)
) Help/Dir -
U accidentally delivered one more tip than you said (at least for me), u typed exit() to exit Python from terminal, while I used to import sys first from os, and then do sys.exit()..Thanks, you are one of the best teachers for me!!!👍🤗
