Page 1 - Lesson Note-DFH-Binary & CSV File
P. 1
Computer Science
Chapter – Data File Handling
Topic: Binary and CSV Files
Class – XII
Binary File Operations
For writing the content of class or dictionary and to read it, we need to use the Python
module pickle.
Pickling is the process of converting the structure to a byte stream before writing to the file.
Unpickling is the reverse process, reading the contents of the file, it is used to convert the
byte stream back to the original structure.
Pickle module can be used to store any kind of object in a file, it stores object with its
structure.
Relative and Absolute Path
Files are organised into directories/folders.
Every running program has a current directory and it is the default directory for most of the
operations.
While opening a data file, languages look for the data file in the current directory.
The os(operating system) module provides functions for working with files and directories.
os.getcwd() – returns the name of the current directory
Path – The string that identifies the location of a file is the path of the file its like address of
the file.
