CBSE Class 12 Computer Science File Handling in Python Notes

Files

• File is very common word used in general life.

• Files are essential parts of the computers. Everything stored in computers are saved in files. Data can be represented in specific forms in files.

• Files are saved with an extension or file types. They need a specific program to read data and write data.

• For ex. Documents can be opened and read through Word Processing Software such as MS Word, Libre Office etc.

• Finally a file is defined as a sequence of bytes or collection of characters on the disk/permanent storage where a group of related data is stored.

• File is created for permanent storage of data.

• In Programming also you must have observed, the normal programs which run for a short period of time and give some output and after that their data is disappeared.

• When we again run those programs then we have to use new data.

• This is because the data is entered in primary memory which is temporary memory and its data is volatile.

• Sometimes, it is not enough to only display the data on the console. Also, it is impossible to recover the programmatically generated data again and again. However, if we need to do so, we may store it onto the file system which is not volatile and can be accessed every time.

• This is because the data is entered in primary memory which is temporary memory and its data is volatile.

• In programming, Sometimes, it is not enough to only display the data on the console.

• Also, it is impossible to recover the programmatically generated data again and again. However, if we need to do so, we may store it onto the file system which is not volatile and can be accessed every time.

• Here, comes the need of FILE HANDLING in Python.

FILE HANDLING is the process of handling data by software including IO operations. These files are stored on hard drive.

• Whenever we want to perform any operation, file is opened and made available for operations.