StuartGordonReid

def approximate_entropy(self, bin_data: str, pattern_length=10):
    """
    Note that this description is taken from the NIST documentation [1]
    [1] http://csrc.nist.gov/publications/nistpubs/800-22-rev1a/SP800-22rev1a.pdf

    As with the Serial test of Section 2.11, the focus of this test is the frequency of all possible overlapping
    m-bit patterns across the entire sequence. The purpose of the test is to compare the frequency of overlapping
    blocks of two consecutive/adjacent lengths (m and m+1) against the expected result for a random sequence.

    :param bin_data: a binary string

StuartGordonReid

def serial(self, bin_data, pattern_length=16, method="first"):
    """
    Note that this description is taken from the NIST documentation [1]
    [1] http://csrc.nist.gov/publications/nistpubs/800-22-rev1a/SP800-22rev1a.pdf

    The focus of this test is the frequency of all possible overlapping m-bit patterns across the entire
    sequence. The purpose of this test is to determine whether the number of occurrences of the 2m m-bit
    overlapping patterns is approximately the same as would be expected for a random sequence. Random
    sequences have uniformity; that is, every m-bit pattern has the same chance of appearing as every other
    m-bit pattern. Note that for m = 1, the Serial test is equivalent to the Frequency test of Section 2.1.

StuartGordonReid

def linear_complexity(self, bin_data, block_size=500):
    """
    Note that this description is taken from the NIST documentation [1]
    [1] http://csrc.nist.gov/publications/nistpubs/800-22-rev1a/SP800-22rev1a.pdf

    The focus of this test is the length of a linear feedback shift register (LFSR). The purpose of this test is to
    determine whether or not the sequence is complex enough to be considered random. Random sequences are
    characterized by longer LFSRs. An LFSR that is too short implies non-randomness.

    :param bin_data: a binary string

akrasic

Frontend Development

Attention: if you attempt to fork this gist, github will think that you are a spammer and you will have to confirm that you are human with them. Apparantly there are too many links in this list. Also I update it rather frequently (see revisions on the left), so it's probably wise to not fork it anyway.

• Guides
  • Hack Design
  • Designer School
  • TheExpressiveWeb
  • Talks To Help You Become A Better Front-End Engineer In 2013
• Web Development Teaching Materials

enaeseth

"""
Convert a MongoDB ObjectID to a version-1 UUID.

Python 2.7+ required for datetime.timedelta.total_seconds().

ObjectID:
    - UNIX timestamp (32 bits)
    - Machine identifier (24 bits)
    - Process ID (16 bits)
    - Counter (24 bits)

crashdump

#!/usr/bin/env python
# -*- coding: utf-8 -*-

__author__ = "Adrien Pujol - http://www.crashdump.fr/"
__copyright__ = "Copyright 2013, Adrien Pujol"
__license__ = "Mozilla Public License"
__version__ = "0.3"
__email__ = "adrien.pujol@crashdump.fr"
__status__ = "Development"
__doc__ = "Check a TLS certificate validity."

mattbornski

#!/usr/bin/env python

# I was frustrated that no matter what buffer setting I passed to communicate,
# I could not get stdout from my subprocess until the process had completed.
# I googled around and came up with this, which illustrates the problem and a
# solution.

# http://stackoverflow.com/questions/2804543/read-subprocess-stdout-line-by-line
# http://bugs.python.org/issue3907
# http://docs.python.org/library/io.html