Version: 1.1.240919 (As in: Main.sub.YYMMDD)

• Library's Documentation

• Author's Github

Introduction

Welcome to the PlainTools library's GitHub repo!

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 :code:pt.plist or :code: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' function are:

>>> import PlainTools as pt

>>> print(0.1 * 3)
0.30000000000000004

>>> print(pt.pnumber(0.1 * 3))
0.3 # Deals with float imprecision errors.
؜

>>> print(5 / 3)
1.6666666666666667

>>> print(pt.pnumber("5 / 3"))
1.666... # '...' present only in string format; The true value is still float(5/3).
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>>> print(7 / 53)
0.0958904109589041

>>> print(pt.pnumber(7 / 53))
0.095890410958904109589041... # Can detect long chains of repeating decimals!
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>>> print(0.9999999999999988)
0.9999999999999988

>>> print(pt.pnumber(0.9999999999999988))
0.9999999999999988 # No loss of precision up to 15 literal digits.
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>>> print(0.00000000001 ** 3)
9.999999999999999e-34

>>> print(pt.pnumber(0.00000000001 ** 3))
1e-33 # Corrects scientific-notated float imprecisions as well.
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>>> print(pt.pnumber("math.pi")) # A safe variation of 'eval()' is used, as shown below!
3.141592653589793

# https://stackoverflow.com/a/1933463/26469850
>>> print(pt.pnumber("import shutil; shutil.rmtree('/.')")) # Example of malicious use.
PlainTools.SEVAL.UnsafeError: Invalid syntax in expression
؜

• More about Seval (Safe Eval).

Simple, right?

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