billyshambrook

class my_error_handling(object):
    def __enter__(self): pass

    def __exit__(self, exc_type, exc_val, exc_tb):
        if issubclass(exc_type, UnicodeError):
            print "annoying"
        elif issubclass(exc_type, ValueError):
            print "hrmm"
        elif issubclass(exc_type, OSError):
            print "alert sysadmin"

billyshambrook

#!/bin/zsh

# Global virtualenvwrapper postactivate, lives in $WORKON_HOME/postactivate

# Remove virtual env from start of PS1 as it's in RPROMPT instead
PS1="$_OLD_VIRTUAL_PS1"

PROJECT_DIR="$HOME/projects/$(basename $VIRTUAL_ENV)"
if [ -d $PROJECT_DIR ]; then
    # If we aren't already within the project dir, cd into it

billyshambrook

#!/bin/zsh

# Global virtualenvwrapper postactivate, lives in $WORKON_HOME/postdeactivate

if [ $PRE_VENV_ACTIVATE_DIR ]; then
    cd $PRE_VENV_ACTIVATE_DIR
    unset PRE_VENV_ACTIVATE_DIR
    unset CURRENT_PROJECT
fi

billyshambrook

# Retry decorator with exponential backoff
def retry(tries, delay=3, backoff=2):
    """
    Retries a function or method if exception is raised.

    delay sets the initial delay in seconds, and backoff sets the factor by which
    the delay should lengthen after each failure. backoff must be greater than 1,
    or else it isn't really a backoff. tries must be at least 0, and delay
    greater than 0.
    """

billyshambrook

ffmpeg -t 00:01:00 -i input.mpg -map 0:0 -vf idet -c rawvideo -y -f rawvideo /dev/null

billyshambrook

[idet @ 0x17d10a0] Single frame detection: TFF:32 BFF:0 Progressive:0 Undetermined:42
[idet @ 0x17d10a0] Multi frame detection: TFF:58 BFF:0 Progressive:0 Undetermined:16

billyshambrook

import re

pattern = "\\[(.*)] Multi (.+):(.+):(?P\\w+) (.+):(?P\\w+) (.+):(?P\\w+) (.+):(?P\\w+)"
match = re.search(pattern, output)
scan = dict((k, int(v)) for k, v in match.groupdict().iteritems())
scan = max(scan, key=scan.get)

billyshambrook

import boto.sqs

""" Defence from brief connection outages """ 
@retry(10)
def connect_to_sqs():
    conn = boto.sqs.connect_to_region("us-west-2")
    return conn.create_queue('myqueue')

billyshambrook

function virtualenv_info {
    [ $VIRTUAL_ENV ] && echo '('`basename $VIRTUAL_ENV`') '
}

function prompt_char {
    git branch >/dev/null 2>/dev/null && echo '±' && return
    hg root >/dev/null 2>/dev/null && echo '☿' && return
    echo '○'
}

billyshambrook

"""
Create argument within decorator and pass to decorated method.
Key things that make this possible is to ensure that your decorated method allows *args and **kwargs to be passed.
You then within the decorator append whatever to kwargs and/or args.
"""
def decorate_my_decorator(f):
    def function_my_decorator(*args, **kwargs):
        kwargs['somethings'] = 'hello'
        return f(*args, **kwargs)
    return function_my_decorator