URL: https://www.progressiverobot.com/pandas-rename-column-index/ Sometimes we want to rename columns and indexes in the Pandas DataFrame object. We can use pandas DataFrame rename() function to rename columns and indexes. It supports the following parameters. mapper: dictionary or a function to apply on the columns and indexes. The 'axis' parameter determines the target axis – columns or indexes. […]
“Hello, World!” 程序是一个经典的，确立已久的传统电脑程序。”Hello, World!“因为能展示一个语言的基本句法，因此常被用作初学者的第一个”简单但完整”的程序，并可以被用来测试编程环境。 这个教程将指导你写出第一个Python 3中的”Hello, World”程序。 你需要[安装好Python…
This is an article about Python data types. It discusses different kinds of data types and their functionality. Some examples of data types are numeric, string, sequence, and mapping.
URL: https://www.progressiverobot.com/python-keyerror-exception-handling-examples/ 1. What is Python KeyError Exception? Python KeyError is raised when we try to access a key from dict, which doesn't exist. It's one of the built-in exception classes and raised by many modules that work with dict or objects having key-value pairs. 2. Python KeyError with Dictionary Let's look at a simple […]
URL: https://www.progressiverobot.com/python-print/ Hello learners. In this tutorial we are going to learn more about Python print function. In our last tutorial we learned about [Python float](/community/tutorials/python-float) function. Python Print Almost all of our previous tutorial contains the Python print() function. But we did not discussed about python print function to the fullest. Now we will […]
URL: https://www.progressiverobot.com/python-string-append/ Python string object is immutable. So every time we use + operator to concatenate two strings, a new string is created. If we have to append many strings, using + operator will unnecessarily create many temporary strings before we have the final result. Python String Append Let's look at a function to concatenate […]
URL: https://www.progressiverobot.com/python-super/ Python super() function allows us to refer to the parent class explicitly. It's useful in case of inheritance where we want to call super class functions. Python super To understand about python super function, you have to know about [Python Inheritance](/community/tutorials/python-inheritance-example). In Python Inheritance, the subclasses inherit from the superclass. Python super() function […]
URL: https://www.progressiverobot.com/relu-function-in-python/ Relu or Rectified Linear Activation Function is the most common choice of activation function in the world of [deep learning](/community/tutorials/introduction-to-machine-learning). Relu provides state of the art results and is computationally very efficient at the same time. The basic concept of Relu activation function is as follows: Return 0 if the input is negative otherwise […]
List comprehensions offer a succinct way to create lists based on existing lists. In this tutorial, we will cover the syntax of list comprehension, which will be an important tool in creating efficient code.
We can call a C function from Python program using the ctypes module. Calling C Function from Python It involves the following steps: Creating a C file (.c extension) with the required functions Creating a shared library file (.so extension) using the C compiler. In the Python program, create a ctypes.CDLL instance from the shared […]
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