Meeting point of python coders
Question: I have a QTableView in PyQT5 / PySide2 I want to Know if a row is selected (my tableview is set to select by rows) Know which row is selected Thanks Answer: A bit hackishly though: select = tableview.selectionModel() selected = select.selectedRows() if selected: print(selected[0].row()) but that does it well: selected = select.hasSelection()
Hi folks, an announcement! It’s a bit sad to see that PySide Docs are actually Qt examples. The name is cut off from the scene. We’ve started a project devoted to Pyside docs at pythonmembers.club/pyside. We intend to write self-contained snippets to help people out! Mail arj dot python at gmail dot com if you… Continue Reading We Launched a Pyside Docs Section 🎉
Python’s help function lets you see the help message written for you by the developer. It is particularly useful in IDLE / shell to inspect modules and explore. Here is a sample shell demo >>> help(print) Help on built-in function print in module builtins: print(…) print(value, …, sep=’ ‘, end=’\n’, file=sys.stdout, flush=False) Prints the values… Continue Reading Get Python’s help() function stored as string just like console
String manipulation functions, good ones are available by default in Python. Ignorance make people always re-invent. Python is powerful and … thoughtful. We were strict and choose only 5, the five best. Hope you enjoy it! What are string manipulation functions? String manipulation functions are helper functions used to manipulate strings. If you have let… Continue Reading String Manipulation Functions: The Top 5 You Forgot To Pack
If you are in web development, maybe you’ve heard of Sass, Less, Pug, Stylus etc. All these are pre-processors. In this tutorial we’re going to build nothing less than a functional css pre-processor from scratch with variables and functions. This type of new language is called source-to-source compiled. If you are thrilled, i hope not… Continue Reading DSL / Python / New Language: How to build a CSS pre-processor (like SASS) from scratch (DotDot)
#7 random forest Machine Learning 👉 ♡ supervised learning♡ unsupervised learning♡ reinforcement learning recap:🔖 types of supervised learning ✔ classification 📑 ✔ regression 📈 ✔ mixed ⚗– tree based – random forest 🎈– neural networks– support vector machines 🌳 overfitting and the problem with trees trees classify by drawing square boxes around the data, which… Continue Reading Machine Learning part 7: Random Forests Explained
Machine Learning 👉 ♡ supervised learning ♡ unsupervised learning ♡ reinforcement learning recap: 🔖 types of supervised learning ✔ classification 📑 ✔ regression 📈 ✔ mixed ⚗ tree based :balloon: random forest neural networks support vector machines 🎗 enthropy enthropy is just another word for expected value in the past post, we decided what to… Continue Reading Machine Learning part 6: enthropy and gain
#5 mixed methods Machine Learning 👉 ♡ supervised learning♡ unsupervised learning♡ reinforcement learning types of supervised learning ✔ classification 🗒 ✔ regression 📈 ✔ mixed ⚗– tree based– random forest– neural networks– support vector machines mixed methods are used for classification and regression. 🌱 tree based method those trees used for both for classification and… Continue Reading Machine Learning part 5: mixed methods
#4 gradient descent and cost function Machine Learning 👉 ♡ supervised learning♡ unsupervised learning♡ reinforced learning ☄ cost function cost function is also called mean squared error. well mean means sum of elements / number of elements. here we take the sum of all squared errors (error1 ^ 2 + error2 ^ 2 + error3… Continue Reading Machine Learning part 4: Gradient Descent and cost function
geo plotting has never been so easy. thanks dhrumil patel! download the data file here #Import Library import folium import pandas as pd #Load Data data = pd.read_csv(“hotspot.csv”) lat = data[‘Longitude’] lon = data[‘Latitude’] elevation = data[‘Location’] #Create base map map = folium.Map(location=[37.296933,-121.9574983], zoom_start = 5, tiles = “Mapbox bright”) #Plot Markers for lat, lon,… Continue Reading Plotting Hotspots in Mauritius with Python and Folium