Python script that computes the git sha1 value, commandlinized

gistfile1.txt

def git_sha1(fname):
  import hashlib
  with open(fname, 'r') as f:
     data = f.read()
     sha1 = hashlib.sha1()
     sha1.update("blob %d\0%s" % (len(data), data))
     return sha1.hexdigest()


if __name__ == "__main__":
    import sys
    fname = sys.argv[1]
    print git_sha1(fname)