Python is an interpreted and general purpose programming language. It is a Object-Oriented and Procedural paradigms programming language. There are various types of modules imported in python such as difflib, hashlib.
Modules used:
- difflib : It is a module that contains function that allows to compare set of data.
- SequenceMatcher : It is used to compare pair of input sequences.
Function Used:
- hash_file ( string $algo , string $filename , bool $binary = false ): It is a function which has the hash of a file.
- object.hexdigest(): It is a function which returns string.
- fileObject.read(size): It is a function that returns the specified number of bytes of a file.
Approach
- Import module
- Declare a function with 2 arguments which is for file.
- Declare two objects for hashlib.sha1()
- Open files
- Read the file by breaking the line into smaller chunks
- Now return both file such as h1.hexdigest() which is of 160 bits.
- Use hash_file() function to store the hash of a file.
- Compare and generate appropriate message
Files in Use
Program:
Python3
import hashlib from difflib import SequenceMatcher def hash_file(fileName1, fileName2): # Use hashlib to store the hash of a file h1 = hashlib.sha1() h2 = hashlib.sha1() with open(fileName1, "rb") as file: # Use file.read() to read the size of file # and read the file in small chunks # because we cannot read the large files. chunk = 0 while chunk != b'': chunk = file.read(1024) h1.update(chunk) with open(fileName2, "rb") as file: # Use file.read() to read the size of file a # and read the file in small chunks # because we cannot read the large files. chunk = 0 while chunk != b'': chunk = file.read(1024) h2.update(chunk) # hexdigest() is of 160 bits return h1.hexdigest(), h2.hexdigest() msg1, msg2 = hash_file("pd1.pdf ", "pd1.pdf") if(msg1 != msg2): print("These files are not identical") else: print("These files are identical") |
Output
These files are not identical
