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Step-by-Step Guide to Reading Different Files in Python

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 In the world of data science, automation, and general programming, working with files is unavoidable. Whether you’re dealing with CSV reports, JSON APIs, Excel sheets, or text logs, Python provides rich and easy-to-use libraries for reading different file formats. In this guide, we’ll explore how to read different files in Python , with code examples and best practices. 1. Reading Text Files ( .txt ) Text files are the simplest form of files. Python’s built-in open() function handles them effortlessly. Example: # Open and read a text file with open ( "sample.txt" , "r" ) as file: content = file.read() print (content) Explanation: "r" mode means read . with open() automatically closes the file when done. Best Practice: Always use with to handle files to avoid memory leaks. 2. Reading CSV Files ( .csv ) CSV files are widely used for storing tabular data. Python has a built-in csv module and a powerful pandas library. Using cs...
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Calculate Circle Area the Logic You Need to write in Python

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In Python, you can calculate the circle area easily by using the function. The purpose of Python is to use in data analysis.

Calculate circle area in Python using function. The logic you need given for your projects.


You need this logic in many areas. You can use in your present finance projects or new ones. Benefits of function you can re-use the same code number of times.

       
         Area of Circle=pi*r*r


Area of Circle Steps Given - You Can do Using Two Methods, Explained Both Methods

I have given steps to calculate the area of a circle using two different methods. First I followed by creating a user-defined function. Next, directly I ran the formula in the interpreter.
 


Method -1

Steps I have followed to Calculate Area Using Function

  1. Logged into Cent Os (Linux)
  2. Create .py module
  3. Import .py module into Python
  4. Execute .py module

 1. Log in

I have first logged into CentOS. You can see there '$'.

login centos

2. Creating .py module

  • To create ".py" module. You can use the vi editor command.
  • You need 'import decimal' to get Decimal values. Else you will get the only integer.

py module

I have given the PWD command. Which tells the present working directory. There you can give ls command. You can see the list of .py modules. Here, you can see two kinds of modules. Those are .py and .pyc.

The .py is our module, which contains a function to calculate the Circle area. The .pyc module is a Python compiled module that will store in the same directory. When you first import the module in Python, the " .Pyc" module will create by Python.

list of modules

3. Importing the Module from Operating system


  • You need to first go to Python using Python command. There, you can give an import module-name.
  • During import .py for the module extension not required.

import module

 4. Execute Function with Circle area

You can pass a value to function to get the area of a circle.

result circle area

The value is rounded to 2 digits. I used round() function.

Bottom Line

Steps I used explained to calculate the area using the function. In a similar way you can calculate areas for:

  1. Rectangle area
  2. Circle perimeter

Method -2

How to calculate Circle area using the command line

You can give values directly in the Circle area formula to get area.

command line circle area

       
>>> import decimal
>>> from decimal import Decimal
>>>> Decimal(22)/Decimal(7)*10*10
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