DATA FILE HANDLING IN PYTHON

DATA FILE HANDLING
A file is a sequence of bytes on the disk/permanent storage where a group of related data is stored.
• “A File is a collection of characters in which we can perform read and write functions. And also we can save it in secondary storage.”
In programming, Sometimes, it is not enough to only display the data on the console. Those data are to be retrieved later on, then the concept of file handling comes.
File handling in Python enables us to create, update, read, and delete the files stored on the file system through our python program
The data stored with in a file is known as persistent data because this data is permanently stored in the system.
Python provides reading and writing capability of data files.
We save the data in the files for further use.
As you save your data in files using word, excel etc. same thing we can do with python.
Data File Operations
Opening a file.
Performing operations
READ
WRITE etc.
Closing The File
Beside above operations there are some more operations can be done on files.-
Creating of Files
Traversing of Data
Appending Data into file.
Inserting Data into File.
Deleting Data from File.
Copying of File.
Updating Data into File
File Types
Text File: A file whose contents can be viewed using a text editor is called a text file. A text file is simply a sequence of ASCII or Unicode characters. Python programs, contents written in text editors are some of the example of text files. e.g. .txt,.rtf,.csv etc.
Binary File: Binary files are used to store binary data such as images, videos audio etc. Generally numbers are stored in binary files. In binary file, there is no delimiter to end a line. Since they are directly in the form of binary hence there is no need to translate them. That’s why these files are easy and fast in working.
Opening & Closing Files
We need a file variable or file handle to work with files in Python.
This file object can be created by using open( ) function or file( ) function.
Open( ) function creates a file object, which is used later to access the file using the functions related to file manipulation.
File accessing modes:-
read(r): To read the file –
write(w): to write to the file –
append(a): to Write at the end of file