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#!/bin/bash

#######################################################################
# This is a helper script that keeps snapraid parity info in sync with
# your data and optionally verifies the parity info. Here's how it works:
#   1) Shuts down configured services
#   2) Calls diff to figure out if the parity info is out of sync.
#   3) If parity info is out of sync, AND the number of deleted or changed files exceed
#      X (each configurable), it triggers an alert email and stops. (In case of
#      accidental deletions, you have the opportunity to recover them from

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import ruamel.yaml as yaml

with open("example.yaml") as stream:
    try:
        print(yaml.load(stream))
    except yaml.YAMLError as exc:
        print(exc)

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# Exclude folder from tar
$ tar --exclude='./folder' --exclude='./upload/folder2' -zcvf /backup/filename.tgz .
# Make sure to put --exclude before the source and destination items.

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# Creation of virtualenv:
python3 -m venv <desired-path>
# Activate the virtualenv:
source <desired-path>/bin/activate
# Deactivate the virtualenv:
deactivate
# Install packages with pip3
pip install Cython==0.27.3
pip install kivy

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# Open file
with open(streams_file, 'r') as f:
    # Read lines and strip '\n' new line character
    streams = [x.strip('\n') for x in f.readlines()] # List of streams

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# This is extended slice syntax. It works by doing [begin:end:step] - by leaving begin and end off and specifying a step of -1, it reverses a string.
>>> 'hello world'[::-1]
'dlrow olleh'

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# To return multiple values from a function, simply return a tuple. For example:

>>> def myfun():
...     return 1, 2, 3
...
>>> a, b, c = myfun()
>>> a
1
>>> b
2

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# It allows you to provide a default value if the key is missing:

dictionary.get("bogus", default_value)
# returns default_value (whatever you choose it to be), whereas

dictionary["bogus"]
# would raise a KeyError.
# If omitted, default_value is None, such that

dictionary.get("bogus")  # <-- No default specified -- defaults to None

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# To exit a script you can use:  
import sys
sys.exit()

# You can also provide an exit status value, usually an integer.
import sys
sys.exit(0)
# Exits with zero, which is generally interpreted as success. Non-zero codes are usually treated as errors. The default is to exit with zero.

import sys

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#!/usr/bin/env python
import os
import zipfile

def zipdir(path, ziph):
    # ziph is zipfile handle
    for root, dirs, files in os.walk(path):
        for file in files:
            ziph.write(os.path.join(root, file))