30 000 % speed improvement

https://www.ibm.com/developerworks/community/blogs/jfp/entry/Python_Is_Not_C?lang=en

What’s a bug ?

http://www.yegor256.com/2015/06/18/good-programmers-bug-free.html

Compile ?

http://ruslanspivak.com/lsbasi-part1/

String formatting

http://pyformat.info/

Cutting off the internet

https://www.youtube.com/watch?v=YHbKxFcDltM

True or False ?

Here are different way to transform values from a config file to a boolean

Which is your favourite ?

devpi install z3c.appconfig

>>> from z3c.appconfig.utils import asBool

>>> asBool("true")

True

>>> asBool(1)

True

>>> asBool(-1)

True

>>> asBool("no")

False

>>> asBool("yes")

True

>>> asBool("Yes")

True

>>> asBool("YES")

True

>>> asBool("NO")

False

>>> asBool("off")

False

>>> asBool("on")

True

>>> asBool('Lorem')

Traceback (most recent call last):

  File "<stdin>", line 1, in <module>

  File "/home/nlaurance/PycharmProjects/dev_venv/local/lib/python2.7/site-packages/z3c/appconfig/utils.py", line 18, in asBool

    raise ValueError("Invalid boolean: %s" % value)

ValueError: Invalid boolean: lorem

>>> asBool(456)

True

>>> asBool(0)

False

devpi install distutils

>>> from distutils.util import strtobool

>>> strtobool('true')

1

>>> strtobool('False')

0

>>> strtobool('off')

0

>>> strtobool('on')

1

>>> strtobool('y')

1

>>> strtobool('n')

0

>>> strtobool('lorem')

Traceback (most recent call last):

  File "<stdin>", line 1, in <module>

  File "/usr/lib/python2.7/distutils/util.py", line 325, in strtobool

    raise ValueError, "invalid truth value %r" % (val,)

ValueError: invalid truth value 'lorem'

>>> strtobool('1')

1

>>> strtobool(456)

Traceback (most recent call last):

  File "<stdin>", line 1, in <module>

  File "/usr/lib/python2.7/distutils/util.py", line 319, in strtobool

    val = string.lower(val)

  File "/usr/lib/python2.7/string.py", line 226, in lower

    return s.lower()

AttributeError: 'int' object has no attribute 'lower'

Roll your own

>>> def asbool(value):

...     return str(value).lower() in ('true', 't', 'on', 'yes', 'y', '1', '1.0')

...

>>> asbool('f')

False

>>> asbool('YES')

True

>>> asbool(True)

True

>>> asbool(False)

False

>>> asbool(0)

False

>>> asbool(1)

True

>>> asbool(-1)

False

>>> asbool('On')

True