Hashing the files to enable to ability to checksum

Hashing files

import hashlib
    
    filename = '/path/to/file/file1.txt';
    
    def file_hash(filename):
      h = hashlib.sha256()
      with open(filename, 'rb', buffering=0) as f:
        for b in iter(lambda : f.read(128*1024), b''):
          h.update(b)
      return h.hexdigest()
    
    
 print file_hash(filename)

zlib

import zlib
def adler32sum(filename, blocksize=65536):
    checksum = zlib.adler32("")
    with open(filename, "rb") as f:
        for block in iter(lambda: f.read(blocksize), b""):
            checksum = zlib.adler32(block, checksum)
    return checksum & 0xffffffff

import hashlib
BLOCKSIZE = 65536
hasher = hashlib.md5()
with open('anotherfile.txt', 'rb') as afile:
buf = afile.read(BLOCKSIZE)
while len(buf) > 0:
hasher.update(buf)
buf = afile.read(BLOCKSIZE)
print(hasher.hexdigest())

import hashlib
BLOCKSIZE = 65536
hasher = hashlib.sha1()
with open('anotherfile.txt', 'rb') as afile:
buf = afile.read(BLOCKSIZE)
while len(buf) > 0:
hasher.update(buf)
buf = afile.read(BLOCKSIZE)
print(hasher.hexdigest())