Problem: You have a Python code file script.py and you want to run it in your Python shell with arguments. Example: You seek a function execute(“script.py”, arg1, arg2, …). The arguments arg1, arg2, … should be used within script.py. How to execute the Python file within your Python code by passing the arguments to the … Read more
In this article, you’ll learn three ways to execute Python and non-Python programs from within a Python program. Method 1: Execute a File with Subprocess Challenge: In Python, sometimes you need to execute another file, script, or program from within your own Python program and provide arguments. There are a number of ways to do … Read more
If you’re like me, you want to come to the heart of an issue fast. Here’s the 1-paragraph summary of the enumerate() function—that’s all you need to know to get started using it: Python’s built-in enumerate(iterable) function allows you to loop over all elements in an iterable and their associated counters. Formally, it takes an … Read more
Matplotlib with Python is the most powerful combination in the area of data visualization and data science. This guide takes 25 minutes of your time—if you watch the videos, it’ll take you 2-4 hours. But it will be a great investment of your time because it’ll make you a better coder and more effective data … Read more
This article describes how to generate interactive plots by using the .widgets package from the matplotlib library. As can be inferred from the name, the .widgets package allows creating different types of interactive buttons, which can be used for modifying what is displayed in a matplotlib graph. In particular, this article will focus on the … Read more
If used without argument, Python’s built-in dir() function returns the function and variable names defined in the local scope—the namespace of your current module. If used with an object argument, dir(object) returns a list of attribute and method names defined in the object’s scope. Thus, dir() returns all names in a given scope. Usage Learn … Read more
Python’s built-in dict() function creates and returns a new dictionary object from the comma-separated argument list of key = value mappings. For example, dict(name = ‘Alice’, age = 22, profession = ‘programmer’) creates a dictionary with three mappings: {‘name’: ‘Alice’, ‘age’: 22, ‘profession’: ‘programmer’}. A dictionary is an unordered and mutable data structure, so it … Read more
This article deals with the analysis and processing of signals, more specifically on how to identify and calculate the peaks contained in a given signal. Motivation Being able to identify and hence work with the peaks of a signal is of fundamental importance in lots of different fields, from electronics to data science and economics. … Read more
No matter the stage of your Python development career, you probably already appreciate the importance of running and testing your code. This is the only way to ensure it works as planned and does what you need it to do. But how do you actually run scripts and code? This article will give you a … Read more
Problem: Write a function that joins an arbitrary number of string arguments with a given separator. Example: Given the string arguments “A”, “B”, and “C” and the string separator “-“. Join them to the concatenated string “A-B-C”. Solution: The following code creates a Python function concat() that takes an arbitrary number of arguments, packs them … Read more
Python’s built-in getattr(object, string) function returns the value of the object‘s attribute with name string. If this doesn’t exist, it returns the value provided as an optional third default argument. If that doesn’t exist either, it raises an AttributeError. An example is getattr(porsche, ‘speed’) which is equivalent to porsche.speed. Usage Learn by example! Here’s an … Read more
Heatmaps are a specific type of plot which exploits the combination of color schemes and numerical values for representing complex and articulated datasets. They are largely used in data science application that involves large numbers, like biology, economics and medicine. In this video we will see how to create a heatmap for representing the total … Read more