Skip to main content

Python - Setup a New Project and use Virtual Environment

🐍 How to set up a new project and use Virtual Environment?
Run the following on Terminal to set up a new project in a Virtual Environment.
mkdir Test_Project_2
cd Test_Project_2
mkdir code
virtualenv venv
source venv/bin/activate
pip install Flask
pip install Flask-JWT
pip install Flask-RESTful
pip install Flask-SQLAlchemy
Answer to:

Comments

Popular posts from this blog

Two Ways of rendering in React Examples

Two Ways of rendering in React Examples 1 - Render twice HTML < div id = "p1" ></ div > < div id = "p2" ></ div > CSS . person { display : inline - block ; margin : 10px ; border : 1px solid # eee ; box - shadow : 0 2px 2px # ccc ; } JAVASCRIPT (Babel) function Person ( props ) { return ( < div className = ' person "> < h1 >{ props . name }</ h1 > < p > Age :{ props . age }</ p > </ div > ); } ReactDOM . render (< Person name = "VK" age = "29" />, document . querySselector ( '#p1' )); ReactDOM . render (< Person name = "HK" age = "28" />, document . querySselector ( '#p2' )); 2 Render all at once HTML < div id = "app" ></ div > CSS . person { display : inline - block ; margin : 1...

Difference between .exec() and .execPopulate() in Mongoose?

Here I answer what is the difference between .exec() and .execPopulate() in Mongoose? .exec() is used with a query while .execPopulate() is used with a document Syntax for .exec() is as follows: Model.query() . populate ( 'field' ) . exec () // returns promise . then ( function ( document ) { console . log ( document ); }); Syntax for .execPopulate() is as follows: fetchedDocument . populate ( 'field' ) . execPopulate () // returns promise . then ( function ( document ) { console . log ( document ); }); When working with individual document use .execPopulate(), for model query use .exec(). Both returns a promise. One can do without .exec() or .execPopulate() but then has to pass a callback in populate.

Python - Mathematical Functions - Hexadecimal, Binary, Exponential, Absolute, Round

🐍 Some mathematical functions are in-built in python. Here are some of them. Convert Decimal to Hexadecimal hex(246) Output: '0xf6' hex(512) Output: '0x200' 0x is prefix to all hexadecimal numbers in output. The number after 0x is the hexadecimal value. Convert Decimal to Binary bin(1234) Output: '0b10011010010' bin(246) Output: '0b11110110' bin(512) Output: '0b1000000000' Exponential Function pow() function is similar to num1**num2, but it comes useful when you want to execute (num1**num2)%num3. Passing three arguments to pow(), does this. pow(3,4) Output: 81 This works just like 3**4 pow(3,4,5) Output: 1 But this, works equivalent to (3**4)%5. Either of the two ways can be used. At this point I feel (3**4)%5 is better, as anybody reading the code will understand what is being done immediately. While with pow(2,3,4), the person may have to refer to documentation to understand how this function works. Absolute Value The function abs() is used ...