In the old days, we used import pdb and pdb.set_trace() to debug For example, we create a file called ‘main.py’ and enter the following. import pdb def hello(): print('hello1') print('hello2') y = 2 z = 3 x=True pdb.set_trace() print(y+z) print(x+x) hello() pdb.set_trace() print(x+y) But now, we just need to…

Unit test is to ensure that the code still functions as expected after making changes to the code and helps ensure code stability. First, we can create a file called area.py which contain a function to calculate the area of a quadrilateral. def calculate_quad_area(length, width): return length Then we…

Python’s decorators are a highly strong and practical tool because they let programmers change the behavior of a function or class. Decorators enable us to wrap another function in order to modify its behavior temporarily while extending the behavior of the wrapped function. For example, now we have a…

To use the pylint we need to install pylint at terminal. pip install pylint Then we can create a file, such as “main.py”. def add(a,b): return a+b print(add(1,3)) Go to the terminal and type “pylint main.py” ************* Module main copy main copy.py:5:0: C0305: Trailing newlines (trailing-newlines) main copy.py:1:0: C0114: Missing module…

__name__ is a built-in variable name which will be __main__, if the file is executed directly. If the file is a module being imported in another file, the __name__ will become the file name. Let’s create two file, file1.py and file2.py In file1.py print(f'my name is {__name__}') In file2.py …

How to import modules from another folder — Import module at the same folder First, we create a folder , such as “learn_module”.

Sometime there is a need to transition on different elements. One example is when the sidebar slide in, there will be a black overlay underneath appear. In this article, we are going to make a simple one to demonstrate it. First, go to the “components” folder and create Sidebar.js. …

The <Transition> component rendered as <div> by default, but we can also render is as other elements by using as prop. We can go under the pages, create about.js. import React from 'react' const about = () => { return ( <div>about</div> ) } export default about At the…