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Installation
This package can be installed & upgraded using pip:
pip install -U plaintools
Introduction
PlainTools is a Python 3 library designed to introduce new features and fix awkward common interactions present in the Python 3 native ecosystem.
Most functions are prefixed with p (as in pt.plist or pt.pround)
to avoid homonyms. The p stands for Plain and are the namesake of this package.
Some simple, yet relevant examples using the Plain Number(pt.pnumber) function are:
>>> import PlainTools as pt
>>> 0.1 * 3
0.30000000000000004
>>> pt.pnumber(0.1 * 3)
0.3 # Deals with float imprecision errors.
>>> 5 / 3
1.6666666666666667
>>> pt.pnumber("5 / 3")
1.666... # '...' present only in string format; The true value is still float(5/3).
>>> 1 / 73
0.0136986301369863
>>> pt.pnumber(1 / 73)
0.013698630136986301369863... # Can detect long chains of repeating decimals!
>>> 0.9999999999999988
0.9999999999999988
>>> pt.pnumber(0.9999999999991234)
0.99999999999912 # No loss of precision up to 14 literal digits.
>>> 0.00000000001 ** 3
9.999999999999999e-34
>>> pt.pnumber(0.00000000001 ** 3)
1e-33 # Corrects scientific-notated float imprecisions as well.
>>> pt.pnumber("math.pi") # A safe variation of 'eval()' is used, as shown below!
3.141592653589793
# https://stackoverflow.com/a/1933463/26469850
>>> pt.pnumber("import shutil; shutil.rmtree('/.')") # Example of malicious use.
PlainTools.SEVAL.UnsafeError: Invalid syntax in expression
- More about Seval (Safe Eval).
Simple, right?
Countless more examples can be found in the Library's Documentation Page, so please check it out!
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