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#!/usr/bin/env python3
import sys
import zlib
def adler32(file):
with open(file, 'rb') as f:
checksum = zlib.adler32(f.read())
return f'{checksum:08x}'
if __name__ == '__main__':
if len(sys.argv) < 2:
print(f"Usage: {sys.argv[0]} <file1> [file2] [file3] ...")
sys.exit(1)
for filename in sys.argv[1:]:
try:
print(adler32(filename))
except IOError as e:
print(f"Error: Could not read file '{filename}' - {e}")
sys.exit(1)
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