Python is an interactive and more accessible language than any other programming language. The python programming language uses a variety of libraries to perform the operations in a faster way. The python language can also be used in web development; Django and Flask are the frameworks used to create web applications using Python. In Python, indentation is the main concept; if we do not follow proper indentation, the code may not run.
We can easily create an application in Python if we are familiar with indentation, Variables, Operators, loop concepts and function concepts in python language. The python programming language consists of modules or functions created to reduce the size of the code.
Modules in Python
The modules or functions in Python are a collection of blocks of code created to perform a particular task or operation. The functions are created to reduce the size of the code, these functions are created to remove the repetitions of the code, and we can call the function when required so that it performs the required operation and returns the result of the operation. The input is passed in the form of the parameters to the function. The main advantage of the function is that we can return as many outputs through the function with the help of various arguments.
We can call the python function as many times as we wish in the program once we have created the function. The function is created with the help of the keyword def, which will allow us to create the function. The python programming language provides the python installation package( pip ) for installing the packages and libraries in the python programming language. There are mainly two times of functions available in the python programming language they are:
- User- defined functions
- Built-in functions
The user-defined functions are created by the user while writing the program as per the requirements in the program. The built-in functions are already defined and provided by the python programming language and can be imported from different libraries available in the python programming language; these libraries are installed using the pip known as the python installation package. We can pass the parameter input to the function with the help of the reference, or we can pass the parameters directly into the function as a value.
How to Download all Modules in Python
The module is a set of lines of code written to reduce the length of the program; these modules are downloaded with the help of the python installation package ( pip ); for this, we need to create a virtual environment which is a semi-isolated Python environment which allows installing the packages, here we use the venv which is a virtual environment it can be used in the versions of Python starting from python 3.3.
The virtual environment can also be created with the help of the virtualenv, which is the third-party alternative for the venv; the virtualenv is used in the python interpreters whose version is less than python 3.4, which does not contain the venv for the creation of the virtual environment
Installation of the Module
To install the module, we need to take the help of the python package manager known as the pip. For the installation of the module, first, we need to open the interpreter and run the pip command in the interpreter:
Sudo install pip module_name
module_name: We need to provide the name of the module which is needed to be downloaded.
The above command will help install the python module in the computer automatically; here, we need to create a virtual environment for the installation of the modules; this virtual environment is created with the help of the venv.
Python installation package on windows:
The venv is generally available in the Python 3.4 or greater versions of the python interpreter, so we need to make sure that the version of Python available on our computer must be greater than version 3.4; if the computer the python version is greater than 3.4 and the pip is not available in the computer, then we need to run the following command for the installation of the pip.
by – 3 –m ensurepip
This command will automatically install the pip in our computer, which is used to install the modules.