HashChecker.py

def checkHash(fileLoc, option):

    # Hash calculator ↓
    from hashlib import md5, sha256, sha512

    # Specifing how many bytes of the file to open at a time  ↓
    BLOCKSIZE = 4096
    # 4096 Byte = 4 KiloByte

    # Variables  ↓
    md5Hasher = md5()
    sha256Hasher = sha256()
    sha512Hasher = sha512()

    with open(fileLoc, 'rb') as file:
        fileData = file.read(BLOCKSIZE)

        # Conditions for desired hashing ↓
        if(option == 'md5'): # MD5sum ↓
            while(len(fileData) > 0):
                md5Hasher.update(fileData)
                fileData = file.read(BLOCKSIZE)
            return md5Hasher.hexdigest()

        elif(option == 'sha256'): # SHA256sum ↓
            while(len(fileData) > 0):
                sha256Hasher.update(fileData)
                fileData = file.read(BLOCKSIZE)
            return sha256Hasher.hexdigest()

        elif(option == 'sha512'): # SHA512sum ↓
            while(len(fileData) > 0):
                sha512Hasher.update(fileData)
                fileData = file.read(BLOCKSIZE)
            return sha512Hasher.hexdigest()

        else:
            return -1


if __name__ == '__main__':
    print('Hello World')