Python Flask From Scratch [Part 3] - Login & Access Control

In this video we will program the login functionality in our Flask app and add some access control

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[JafarJabr]

Great tutorial, Thank you Brad, what I liked the most that you have enough courage to say "I don't know" when you have to, this is very rare.

[DMoots]

10:43 was gold! XD

Thanks for the video Brad! I'm glad you kept in the small mistakes as otherwise it's not a realistic development process.

[arpanagarwal]

Regarding 23:58: *args allows you to pass a variable number of arguments, whereas **kwargs allows you to pass keyworded variable length argument list eg. func(a=2, b=3), that is what 2 stars preceding kwargs stand for(key value pairs) So func(*args, **kwargs) basically stands for: "pass anything into this function".
Great tutorial by the way sir!

[draakisback]

With the wrapper function, the *args allows for the passing of tuples into the wrapper, and the **kwargs allows for the passing of dictionaries into the wrapper. Basically, the way the wrapper works is you pass the session dictionary (in this case), into the function through the kwargs var.

[bjhazelwood]

great mini series, helped a lot with a project i'm working on. btw *args is for passing a variable amount of arguments to a function and **kwargs is passing variable amounts of keyword arguments. mainly useful when u are gonna have a undetermined about of variables being passed to ur function.

anyways great work! very helpful.

[divusiulius]

*Usage of *args:*
*args and **kwargs are mostly used in function definitions. *args and **kwargs allow you to pass a variable number of arguments to a function. What does variable mean here is that you do not know before hand that how many arguments can be passed to your function by the user so in this case you use these two keywords. *args is used to send a non-keyworded variable length argument list to the function.

*Usage of **kwargs*
**kwargs allows you to pass keyworded variable length of arguments to a function. You should use **kwargs if you want to handle Key Word named arguments in Dictionaries in a function.

[porcupine]

*args is a placeholder that allows positional arguments (arguments whose use in the function depends on the order in which they are presented) to be passed through to other functions. **kwargs works the same, but for args which are defined by a keyword (like 'render(article=articles[0], user=user)') and are as such position independent. Much like this binding in js (or =>) these overcome issues of variable scope.

**disclaimer- I'm not an expert by any means on decorators.

[andreiindries]

Hello, as I understand from Corey Schaffer, *args are positional arguments and **kwargs are keyword arguments (like key=>value pairs).

[josephmartinez]

Thank you for making the videos. It has been very helpful in seeing the big picture of basic front end and back end development.

[aritrachatterjee]

Hello World,

First of all thanks a lot Brad for uploading this video. Its amazing and at the same time it engages the reader.

For all the flask-sql module users instead of flask-sqldb, please call the tuple by the number like password=data[4], it will work. Because there is no option to set cursor class to dictionary in the old model.

Thanks
Aritra

[OyaUna]

I feel like I am learning from someone who is very close to me :)

[jfish]

In case anybody is interested in understanding what python decorators actually do I found there is a brilliant tutorial by Corey Schafer explaining decorators in detail

[sayonarasun]

thanks a lot Brad. brilliant tutorial, really helped.

[BOBIKcool]

Awesome. In 30 minutes all you need =). Thanks.

[simplepycodes]

Thanks a lot for the videos. very realistic, the process, speed and practical logic.

[sebastiancadena]

Great tutorial, thanks man. I have a question. I think the variable 'msg' in the _messages.html file is doing nothing. I mean, you can change its name for another one, e.g 'success_message' and it's still working, showing successful messages.

[Virdevir]

thank you Brad, it is very helpful for beginner like me !

[mochammadalifpratama]

When I try to login "ValueError: expected sha256_crypt hash, got sha256_crypt config string instead". Please help!

[harshitharaj]

I don't know wats error in program login is not working for 2 conditions

[ajaykumark]

how did you implement access control? Can you please explain?