Output a log message every x% of a long computation

import logging

logging.basicConfig(level=logging.INFO)


def time_to_log(data, percent=10):
    percent = percent if percent > 1 else percent * 100
    data_size = len(data)
    log_every = data_size * percent / 100
    return float(data_size), lambda i: not i % log_every


data = range(100)
data_size, is_time_to_log = time_to_log(data, 0.2)

for i, d in enumerate(data):
    if is_time_to_log(i):
        logging.info("processing... {:.2%}".format(i / data_size))
    pass  # do whatever is needed
logging.info("processing... 100.00%")

another reader's digest

The borg pattern

https://www.safaribooksonline.com/library/view/python-cookbook/0596001673/ch05s23.html

Neural network, 11 LOC

http://iamtrask.github.io/2015/07/12/basic-python-network/

Best practices

to manage a Python code library

http://pbpython.com/best-practices.html

0x5f3759df

Another magic number

http://h14s.p5r.org/2012/09/0x5f3759df.html

comprendo comprehension ?

http://blog.lerner.co.il/want-to-understand-pythons-comprehensions-think-like-an-accountant/

 Youtube File System

https://github.com/rasguanabana/ytfs

 

A peek in the future

Print

>>> print

>>> from __future__ import print_function

>>> print

<built-in function print>

division

>>> 3/2

1

>>> from __future__ import division

>>> 3/2

1.5

Hold your brace

>>> from __future__ import braces

SyntaxError: not a chance (<input>, line 1)