Metadata-Version: 2.1
Name: symbolite
Version: 0.5.0
Summary: A minimalistic symbolic package.
Author-email: "Hernán E. Grecco" <hernan.grecco@gmail.com>, Mauro Silberberg <maurosilber@gmail.com>
License: MIT License
        
        Copyright (c) 2022 Hernán E. Grecco
        
        Permission is hereby granted, free of charge, to any person obtaining a copy
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Project-URL: Homepage, https://github.com/hgrecco/symbolite
Project-URL: Bug Tracker, https://github.com/hgrecco/symbolite/issues
Keywords: symbolic
Classifier: Programming Language :: Python :: 3.10
Classifier: Programming Language :: Python :: 3.11
Classifier: License :: OSI Approved :: MIT License
Classifier: Operating System :: OS Independent
Classifier: Intended Audience :: Developers
Classifier: Intended Audience :: Science/Research
Classifier: Topic :: Scientific/Engineering
Classifier: Topic :: Software Development :: Libraries
Requires-Python: >=3.10
Description-Content-Type: text/markdown
License-File: LICENSE
License-File: AUTHORS
Provides-Extra: test
Requires-Dist: pytest; extra == "test"
Requires-Dist: pytest-mypy-testing; extra == "test"

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# symbolite: a minimalistic symbolic python package

______________________________________________________________________

Symbolite allows you to create symbolic mathematical
expressions. Just create a symbol (or more) and operate with them as you
will normally do in Python.

```python
>>> from symbolite import Symbol
>>> x = Symbol("x")
>>> y = Symbol("y")
>>> expr1 = x + 3 * y
>>> print(expr1)
x + 3 * y
```

An expression is just an unnamed Symbol.
You can easily replace the symbols by the desired value.

```python
>>> expr2 = expr1.subs_by_name(x=5, y=2)
>>> print(expr2)
5 + 3 * 2
```

The output is still a symbolic expression, which you can evaluate:

```python
>>> expr2.eval()
11
```

Notice that we also got a warning (`No libsl provided, defaulting to Python standard library.`).
This is because evaluating an expression requires a actual library implementation,
name usually as `libsl`. The default one just uses python's math module.

You can avoid this warning by explicitely providing an `libsl` implementation.

```python
>>> from symbolite.impl import libstd
>>> expr2.eval(libstd)
11
```

You can also import it with the right name and it will be found

```python
>>> from symbolite.impl import libstd as libsl
>>> expr2.eval()
11
```

In addition to the `Symbol` class, there is also a `Scalar` and `Vector` classes
to represent integer, floats or complex numbers, and an array of those.

```python
>>> from symbolite import Scalar, Vector
>>> x = Scalar("x")
>>> y = Scalar("y")
>>> v = Vector("v")
>>> expr1 = x + 3 * y
>>> print(expr1)
x + 3 * y
>>> print(2 * v)
2 * v
```

Mathematical functions that operate on scalars are available in the `scalar` module.

```python
>>> from symbolite import scalar
>>> expr3 = 3. * scalar.cos(0.5)
>>> print(expr3)
3.0 * scalar.cos(0.5)
```

Mathematical functions that operate on vectors are available in the `vector` module.

```python
>>> from symbolite import vector
>>> expr4 = 3. * vector.sum((1, 2, 3))
>>> print(expr4)
3.0 * vector.sum((1, 2, 3))
```

Notice that functions are named according to the python math module.
Again, this is a symbolic expression until evaluated.

```python
>>> expr3.eval()
2.6327476856711
>>> expr4.eval()
18.0
```

Three other implementations are provided:
[NumPy](https://numpy.org/),
[SymPy](https://www.sympy.org),
[JAX](https://jax.readthedocs.io).

```python
>>> from symbolite.impl import libnumpy
>>> expr3.eval(libsl=libnumpy)
2.6327476856711
>>> from symbolite.impl import libsympy
>>> expr3.eval(libsl=libsympy)
2.6327476856711
```

(notice that the way that the different libraries round and
display may vary)

In general, all symbols must be replaced by values in order
to evaluate an expression. However, when using an implementation
like SymPy that contains a Scalar object you can still evaluate.

```python
>>> from symbolite.impl import libsympy as libsl
>>> (3. * scalar.cos(x).eval(libsl))
3.0*cos(x)
```

which is actually a SymPy expression with a SymPy symbol (`x`).

And by the way, checkout `vectorize` and `auto_vectorize` functions
in the vector module.

### Installing:

```bash
pip install -U symbolite
```

### FAQ

**Q: Is symbolite a replacement for SymPy?**

**A:** No

**Q: Does it aim to be a replacement for SymPy in the future?**

**A:** No
