evolution strategies for cartpole

my simple and straightforward [implementation](https://github.com/mynameisvinn/CartpoleES) of evolution strategies applied to the game of cartpole. hope you find it helpful!

/r/Python
https://redd.it/7dhqa3

Python package for defining, recoding, and validating table schemas in pandas using a SQLAlchemy-like syntax.

This is a VERY young attempt at solving a recurrent problem I have that I have not found a solution for that "made sense" to me and my work flow.

I need to load, recode, and validate tables all day everyday. Sometimes its simple and you can `pandas.read_table()` and all is good. But sometimes you have a 400 column long RedCap data dump that is complected af and you need to develop your recoding logic through an iterative process.

This is an attempt of mine to apply a sort of "test driven development" approach to data cleaning. Define a representation of your ideal form of your data. Then use this to validate your input table. It WILL fail. Add recoding functions until your validations pass. Then you can pass this representation into your loading functions, or whenever your program gets a version of this type of data from another process to do sanity checks before going further.

Please take a look and offer thoughts/advice.

https://github.com/xguse/table_enforcer

/r/Python
https://redd.it/7dg00l

Learning recurrent neural networks (also available in Chinese)
http://peterroelants.github.io/posts/rnn_implementation_part01/

/r/JupyterNotebooks
https://redd.it/7dh0ew

DSF calls for applicants for a Django Fellow
https://www.djangoproject.com/weblog/2017/nov/16/django-fellow-applicants/

/r/django
https://redd.it/7dcpef

Simple Image Processing with Python
http://devarea.com/simple-image-processing-with-python

/r/Python
https://redd.it/7djgpv

Change to django's default id field in 1.11

Hi, I upgraded to django 1.11 and when I use `MyModel.objects.create(id='some_id', **kwargs)` now, the object gets created with an id of `some_id`, where before django's default `AutoField` id field would generate the id automatically.

can anyone confirm this change happened? (I don't mind not passing id, just making sure the version upgrade is the cause of this change)

/r/django
https://redd.it/7djmlb

Help with coming up with a good case to switch from Flask to Django

Hi everyone. So I have inherited a relatively large multi-tenant SAAS application (in terms of business logic) built in Flask.

I have not gone too deep into the code but have started adding features already and have noticed a lot of gotchas already that could've been easily avoided with Django. Also, as you would imagine, a lot of implementation design that would've been done better in Django (auth, permissions, to name a few).

Talking with the business regarding direction of the app suggests that we will later want to have object level permissions, better handling of groups and users, integrations with 3rd party APIs, creating our own RESTful service, etc. Such features I know are already integrated quite well in both Django's batteries and library ecosystem.

My current perspective is to take advantage of a lot of best practice built in Django and the cohesiveness of its ecosystem and avoid a lot of needless library integration and reinventing-the-wheel down the line as this app will only get more complex.

I understand this will require a lot of work upfront and that equates to development costs that could've been spent on new features and this is where I am looking for thoughts and advice from you.

Have you done something like this before?
What was your approach?
What are questions that I need to consider?
What's the best way this can be done incrementally?
Do you think the pros outweigh the cons?
How did you convince the business to pursue the switch?
Is this even worthwhile or am I missing an important point?

/r/django
https://redd.it/7dl77c

Is it useful to install Anaconda on linux, when python and most packages can be installed via package managers ?

My main usage of python for the moment are scripting, and machine learning (using frameworks as tensorflow and keras)

/r/Python
https://redd.it/7dls42

Own decorator getting arguments from another line after - @app.route(rule, *args) - is it possible?

I want to store all functions from my flask app, so I made my own decorator inside Blog class and calling it as follows. It works well, but I also want to store these arguments (rule and methods) from @app.route inside my Blog class. Code as follows:

@Blog.register() # my own generator
@app.route(rule="/api/login", methods=["POST"])
def login():
if request.method == "POST":
data = my_logging_func()
return jsonify(data)

Is there a way to get @app.route params in @Blog.register() as it wraps over it?


/r/flask
https://redd.it/7d3wbt

Inlineformset with Multiple Parents and One Child

Is there a way to have in a template multiple parent forms with one child form for each parent? I can easily create one parent with multiple children using inlineformset but I'm not sure how to make multiple parents with one child.

Code below is setup to handle one parent with one child.

**models.py**

class Parent(models.Model):
parent_name = models.CharField(max_length=30)
class Child(models.Model):
parent = models.ForeignKey(Parent, on_delete=models.CASCADE, related_name="parent")
child_name = models.CharField(max_length=30)

**view.py**

def myview(request):
ChildFormSet = inlineformset_factory(Parent, Child,
form=ChildForm,
can_delete=False,
max_num=1)
parent_form = ParentForm()
formset = ChildFormSet(instance=Parent())
if request.POST:
parent_form = ParentForm(request.POST)
if parent_form.is_valid():
try:
parent = Parent.objects.get(parent_name=parent_form.cleaned_data['parent_name'])
except ObjectDoesNotExist:
parent = parent_form.save(commit=False)
formset = ChildFormSet(request.POST, instance=parent)
if formset.is_valid():
parent.save()
formset.save()
messages.success(request, 'Saved.')
return HttpResponseRedirect('')
return render(request, "pcform.html", {
'parent_form': parent_form,
'formset': formset,
})

**pcform.html**

{% extends 'base.html' %}
{% load crispy_forms_tags %}

{% block content %}
<form method="POST" class="" autocomplate="off">
{% crispy parent_form %}
{% crispy formset formset.form.helper %}
<button type="submit" class="btn btn-primary">Submit</button>
</form>
{% endblock %}


/r/django
https://redd.it/7dm0ft

pinax-stripe 4.0.0 Released - Stripe Connect support lands
https://github.com/pinax/pinax-stripe/releases/tag/v4.0.0

/r/django
https://redd.it/7do0uc

[N] A user friendly editor based on Tensorflow: AI Blocks

Hi everyone!

AI Blocs is a *WYSIWYG* interface making it easier for developers to implement models quickly, I wanted to share my tool with you, hopefully this might help someone, It has proven itself to be very useful to me.

[Screenshot](https://raw.githubusercontent.com/MrNothing/AI-Blocks/master/sc5.png)

The interface is inspired from Unity, you can attach scripts to objects in the scene, run graphs and view the output in real time.

I would love to get some feedback if you have time to check it out.

**Github**: https://github.com/MrNothing/AI-Blocks

**Releases**: https://github.com/MrNothing/AI-Blocks/releases

Thank you!

/r/MachineLearning
https://redd.it/7dk945

Analyzing 481 Flask Repos for Open-Redirects
https://pyt.readthedocs.io/en/latest/past_evaluations.html

/r/flask
https://redd.it/7doom3

Python eCommerce | Build a Django eCommerce Web Application Course - 100% OFF
https://youronlinecourses.net/basics-of-3d-graphics-blender/

/r/django
https://redd.it/7doeu9

I made a crappy game that you might like.

**Edit:** **[GITHUB LINK] (https://github.com/brumafriend/BrumaGame)** TO CODE.

Made with python3, also it's a "console game" AKA all text.

**NOTE: I AM NOT GOOD AT CODING. So don't expect this to be good. At all.**

How the game works:
You have an army and a population, which number 5000 and 25000 respectively. Your population does not include soldiers. The aim is to conquer all 5 of the other countries there are right now: _UK, USA, France, Germany and Russia_.

You can lose in two ways. Firstly, if your population & army is so small that you can't win any war or explore to find more soldiers. Secondly, and most importantly, through **tension**:

Tension starts at 10%.
Winning a war decreases tension.
Losing a war increases tension.
If tension is > 50% there is a chance there may be a civil war which can defeat you or severely damage your army and population numbers.

The mechanics:

**Conscription**: Conscription can allow you to add to an army's numbers by recruiting civilians. Your army can only get to 10,000 members through conscription and for each 1000 people conscripted, **tension** rises by 10%.

**Exploring**: You need 400 civs and 100 soldiers to explore. Exploring can result in gaining civilians and soldiers, this also decreases tension. It can also result in disaster - making you lose the people sent out and causing an increase in tension of 20%.

**War**: The most important aspect of the game is war. Waging war against another country is simple; winning is not. Your chance to win is (x/y)*50 with x being your troops and y being the enemy's. So, if you have equal numbers then there's a 50% chance you win. Upon winning, tension is decreased and you gain troops. You can't defeat the same country twice. Upon losing, tension increases and you lose half of your troops. You can try to attack the country again at a later date.

**Money**: (as of 22:00, 17/11/2017) Money can be used to purchase soldiers. In a desperate situation? Buy your way out of it! You start with $50,000. Winning wars earns you money, losing wars loses you money. Money can also be earned by exploring.



^_edit_: ^Wow. ^Thanks ^for ^the ^support ^guys. ^I'll ^try ^to ^update ^the ^game ^and ^update ^the ^github ^with ^it. ^The ^advice ^has ^been ^helpful ^and ^if ^any ^of ^you ^want ^to ^help ^me ^with ^the ^creation ^of ^the ^game ^in ^any ^way, ^feel ^free ^to ^send ^me ^a ^message.

/r/Python
https://redd.it/7dm6sm

Frustrated Newbie with some newbie questions.

I've been trying to understand python and once i feel im getting a grasp of it, i try to type in the code from an example online and i cant even get to the second line. I use "IDLE" and i type "total_secs = int(input("How many seconds, in total?"))" and i want to go to the second line to continue the code and all it does is print "How many seconds, in total?" The next part of the code is "hours = total_secs // 3600" but...like i said..it just prints the first line. Am I missing something? I appreciate any help. Thanks in advance.

/r/Python
https://redd.it/7dp9rk

Domino effect in 10 lines of Blender Python (tutorial)
http://slicker.me/blender/domino.htm

/r/Python
https://redd.it/7dqvwj

How does the upvote/downvote number on Reddit/Steck Uberflow change instantly? Is it fake clientside code?

If you upvote/downvote any post on Steck Uberflow or Reddit, you'll see the number change instantly. This doesn't seem feasible or sensible. Is it just frontend code that add or minus 1 automatically when you click the upvote/downvote button?

EDIT: I just realized this isn't a Django-related question. Sorry about that.

/r/django
https://redd.it/7dpuub

Paying for help with a Django issue?

Hey all,

I'm a Django novice/intermediate user - I have already launched a web app and I'm working on a second, slightly more complex one.

I've hit a bit of a snag with a particular issue and can't seem to find any solutions on the internet as it's very specific. I'm trying to juggle the functionality of three different django plugins and I fear the scope of what I'm trying to do is slightly above my current competencies.

Because this particular feature I want to implement is something I care for quite dearly I'm prepared to use some of my personal savings to pay someone to help me implement it, or at least to explain how I could go about implementing it myself.

Does anyone know of any good places where I could search for such a person and how much an hour or two of their time would cost?

Thanks

**EDIT** ###More details below

So basically I've got [django-filter](https://github.com/carltongibson/django-filter) set up and working correctly to filter my Product model based on various fields. The user ticks a checkbox or selects something from a dropdown and hits "Submit" on the form and everything filters/sorts correctly.

The issue I'm having is that I'd like to use AJAX so that there is no need to submit the form. The actual filtering/sorting logic is handled by `django-filter` and apparently I'd need to create an API endpoint with `django-rest-framework` so that AJAX can interact with that data.

To make matters more complicated, I'm using `django-wagtail` as a CMS which means I don't have any `views.py` or `urls.py` to work with. The only way to submit data other than HTML is by [overriding the serve() method on the actual page model](http://docs.wagtail.io/en/v1.13.1/reference/pages/model_recipes.html#overriding-the-serve-method).

I more or less know *what* needs to be done but I'm definitely lacking the skills/knowledge/experience to know exactly how to get this to work, and I can't afford to waste a week tinkering around to get it to work...

/r/django
https://redd.it/7dntaj

Will neural network work as articles classification on my website?

I have jobs aggregator which parses offers.
Jobs come from different sources and sometimes there are not relevant posts which I moderate by myself.
Right now I have more than 1000 moderated posts in the database. Can I somehow add automatic filter with neural networks or machine learning? Is there any tutorial on that topic?

I found what I need, here is a nltk guide. https://www.youtube.com/watch?v=FLZvOKSCkxY&list=PLQVvvaa0QuDf2JswnfiGkliBInZnIC4HL&index=1

/r/django
https://redd.it/7dns4f

[D] Low entry barrier is destroying deep learning reputation

For a long time now, I notice many self-proclaimed deep learning experts, wizards, and what-not. With no educational or research background in either machine or deep learning, they think they have obtained expert knowledge in deep learning just by installing tensorflow or keras and running some code from github. Then, they immediately add "deep learning expert" to their name and write tutorial blog posts or even have the nerve to offer courses and write books. Not long ago, I reviewed a book proposal about deep reinforcement learning by some two "hackers", who had no education and no work experience in either machine, deep or deep reinforcement learning, yet they felt they are already experts in it that they just had to write a book about it...

Why this bothers me?

It destroys the reputation of deep learning. Most companies have no clue how to recognize these so called "experts". The job interviewers don't have the required deep learning expertise to properly evaluate candidates and NIPS, ICML, et al. mean nothing to them. So they end up hiring the "experts". Then when inevitably their "deep learning" solutions fail, they conclude that deep learning is not working and it's nothing but a hype. As more and more companies experience this, more and more companies become skeptical about deep learning.
Already, people from the industry half-jokingly refer to AI as artificially inflated.

What do you think? Do you agree or not?
If you agree, what should we do?
Start, a deep learning hiring agency? :)


Update: When I say low entry barrier I don't mean access to education. I mean the accessibility of the material, i.e. you don't need to know much about machine or deep learning to apply it with success to well known problems. However, you do need the knowledge and the research experience to apply it on novel problems.

/r/MachineLearning
https://redd.it/7dqtby