import hashlib
import os

def calculate_md5(file_path):
    """Calculate the MD5 checksum of a file."""
    hash_md5 = hashlib.md5()
    with open(file_path, "rb") as f:
        for chunk in iter(lambda: f.read(4096), b""):
            hash_md5.update(chunk)
    return hash_md5.hexdigest()

def check_checksums(file_with_checksums):
    """Check if the checksums of the files agree with the ones stored in the file."""
    with open(file_with_checksums, 'r') as f:
        for line in f:
            md5_sum, file_path = line.strip().split(maxsplit=1)
            if os.path.isfile(file_path):
                calculated_md5 = calculate_md5(file_path)
                if calculated_md5 == md5_sum:
                    print(f"Checksum matches for {file_path}")
                else:
                    print(f"Checksum does NOT match for {file_path}: expected {md5_sum}, got {calculated_md5}")
            else:
                print(f"File does not exist: {file_path}")

# Replace 'checksums.txt' with the path to your text file
check_checksums('checksums.txt')