everything.txt

everything
------------

module
===================

python -m http.server

python -m json.tools

python -m idlelib.idle

String manipulation
=====================

left pad
convert repeated spaces to one space

.. code-block:: python

    import re; re.sub(r"[ ]+", ' ', 'this    sentence          has              non-uniform      spaces')

The above snippet clears out the repeated spaces in a text and replaces it with single space.
re is a regular expression module to find more than one occurrences of space with '[ ]+'.


password
===================
.. code-block:: python

    import random, string; "".join([random.choice(string.ascii_letters + string.digits) for i in range(8)])

xkcd password

.. code-block:: python

    import random;words=open('/usr/share/dict/words').read().split(); "-".join([random.choice(words) for _ in range(4)])

pronouncable passwords

import random, string, itertools;
"".join(itertools.chain(*zip([random.choice(string.ascii_lowercase) for _ in range(6)],  [random.choice('aeiou') for _ in range(6)])))

file conversions
===================

csv to json

json to csv

csv to sqlite

base64 encoding

base64 decoding

zip all .txt files in directory

batch rename files in directory

prettify json


file manipulation
===================

oxford comma

count words in file

count lines in file

add spaces after punctuation

add line numbers to text file

add line numbers to text file, don't number empty lines

delete trailing spaces

delete multiple newlines between paragraphs to keep only one line

first ten lines of file

last ten lines of file


games
=======

guess the number (binary search)

ascii art
================

asterisk triangle
banners (cowsay)

Mathematic
==============

pascal's triangle

unit convertor

ester eggs
============

import this

networking
==============

get local hostname

  os.uname().nodename

or

  import socket; print(socket.gethostname())


Get IP Address

  import socket; s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM);s.connect(("8.8.8.8", 80));print(s.getsockname()[0])

(Or use urllib with json, read remote API.)