Make rounding optional

[LKirst]

Make rounding of outputs optional by allowing the user to change the boolean attribute round_outputs of an instance of the textstatistics class.

[alxwrd]

hi @LKirst. Thank you for this! I'm happy to accept this as a work around for rounding. The build is currently failing though, see review comments.

[LKirst]

Hi @alxwrd,

Thank you for your feedback. I've implemented the changes as requested.

[alxwrd]

Excellent, thank you!

I've just pushed a couple of tests as I was playing around with it. The usage of

import textstat

textstat.textstat.round_outputs = False

felt a bit awkward.

But, as we expose all the methods of a default textstat instance in the textstat module namespace,

>>> textstat.char_count.__self__ is textstat.textstat.char_count.__self__
True

I've changed the usage to set_rounding(rounding, points=None). Because this now a callable, it also gets exposed from the default instance.

---

So the usage for the default textstat instance is:

import textstat
textstat.set_rounding(False)

of course you could still create a separate instance:

import textstat
from textstat.textstat import textstatistics

my_textstat = textstatistics()
my_textstat.set_rounding(False)

my_not_rounded_index = my_textstat.spache_readability(long_test)

assert my_not_rounded_index == 5.2500456989247315

default_rounded_index = textstat.spache_readability(long_test)

assert default_rounded_index == 5.25