Hi List, I am new to Python and wondering if there is a better python way to do something. As a learning exercise I decided to create a python bash script to wrap around the Python Crypt library (Version 2.7).
My attempt is located here - https://gist.github.com/pjfoley/5989653 I am trying to wrap my head around list comprehensions, I have read the docs at http://docs.python.org/2/tutorial/datastructures.html#list-comprehensions and read various google results. I think my lack of knowledge is making it difficult to know what key word to search on. Essentially I have this list of tuples # Tuple == (Hash Method, Salt Length, Magic String, Hashed Password Length) supported_hashes=[('crypt',2,'',13), ('md5',8,'$1$',22), ('sha256',16,'$5$',43), ('sha512',16,'$6$',86)] This list contains the valid hash methods that the Crypt Library supports plus some lookup values I want to use in the code. I have managed to work out how to extract a list of just the first value of each tuple (line 16) which I use as part of the validation against the --hash argparse option. My Question. Looking at line 27, This line returns the tuple that mataches the hash type the user selects from the command line. Which I then split the seperate parts over lines 29 to 31. I am wondering if there is a more efficient way to do this such that I could do: salt_length, hash_type, expected_password_length = [x for x in supported_hashes if x[0] == args.hash] >From my limited understanding the first x is the return value from the >function which meets the criteria. So could I do something like: ... = [(x[0][1], x[0][2], x[0][3]) for x in supported_hashes if x[0] == args.hash] I am happy to be pointed to some documentation which might help clarify what I need to do. Also if there is anything else that could be improved on with the code happy to be contacted off list. Thanks, Peter. -- http://mail.python.org/mailman/listinfo/python-list
