pysym - npm Package Compare versions

Comparing version 0.1.0 to 0.2.0

CHANGES.rst

@@ -0,1 +1,5 @@
+v0.2
+====
+- Drop Cython extension (too slow, will write pure C++ instead)
+
 v0.1
@@ -2,0 +6,0 @@ ====

PKG-INFO

 Metadata-Version: 1.1
 Name: pysym
-Version: 0.1.0
+Version: 0.2.0
 Summary: Minimal symbolic manipulation framework.
@@ -5,0 +5,0 @@ Home-page: https://github.com/bjodah/pysym

pysym.egg-info/PKG-INFO

 Metadata-Version: 1.1
 Name: pysym
-Version: 0.1.0
+Version: 0.2.0
 Summary: Minimal symbolic manipulation framework.
@@ -5,0 +5,0 @@ Home-page: https://github.com/bjodah/pysym

pysym.egg-info/SOURCES.txt

@@ -9,3 +9,2 @@ AUTHORS
 pysym/__init__.py
-pysym/_pysym.c
 pysym/_release.py
@@ -12,0 +11,0 @@ pysym/core.py

pysym/__init__.py

@@ -12,14 +12,6 @@ # -*- coding: utf-8 -*-
 
-if os.environ.get('PYSYM_USE_NATIVE', '0') == '1':
-    # Will eventually provide a faster alternative
-    from ._pysym import (
-        Symbol, Dummy, Number, ITE, gamma, abs, exp, log,
-        sin, cos, tan, asin, acos, atan,
-        Vector, Matrix, sqrt, _wrap_numbers, Add, Mul,
-        Lt, Le, Eq, Ne, Gt, Ge
-    )
-elif os.environ.get('PYSYM_USE_SYMPY', '0') == '1':
+if os.environ.get('PYSYM_USE_SYMPY', '0') == '1':
     # For debugging purposes only
     from sympy import (
-        Symbol, Dummy, Number, ITE, gamma, abs, exp, log,
+        Symbol, Dummy, Number, ITE, gamma, Abs, exp, log,
         sin, cos, tan, asin, acos, atan,
@@ -31,3 +23,3 @@ Vector, Matrix, sqrt, _wrap_numbers, Add, Mul,
     from .core import (
-        Symbol, Dummy, Number, ITE, gamma, abs, exp, log,
+        Symbol, Dummy, Number, ITE, gamma, Abs, exp, log,
         sin, cos, tan, asin, acos, atan,
@@ -34,0 +26,0 @@ Vector, Matrix, sqrt, _wrap_numbers, Add, Mul,

pysym/_release.py

@@ -1,1 +0,1 @@
-__version__ = '0.1.0'
+__version__ = '0.2.0'

pysym/core.py

@@ -12,5 +12,3 @@ # -*- coding: utf-8 -*-
 
-# from fastcache import clru_cache
 
-
 def _wrap_numbers(func):
@@ -109,3 +107,2 @@ @functools.wraps(func)
     @classmethod
-    # @clru_cache(maxsize=1024*1024, typed=True)
     def create(cls, args):
@@ -374,2 +371,3 @@ return cls(*args)  # extra magic allowed
 Two = Number(2)
+nan = Number(float('nan'))
 
@@ -656,9 +654,10 @@
 
-class abs(Function1):
+class Abs(Function1):
     _function = abs
-    _func_str = 'abs'
+    _func_str = 'Abs'
 
     @staticmethod
     def _deriv(arg):
-        return One
+        return ITE(Lt(arg, Zero), -One,
+                   ITE(Gt(arg, Zero), One, nan))
 
@@ -665,0 +664,0 @@

pysym/tests/test_core.py

@@ -8,3 +8,6 @@ # -*- coding: utf-8 -*-
 
-from .. import Symbol, Add, gamma, Number, sin, cos, Mul, ITE, exp, Lt, tan
+from .. import (
+    Symbol, Add, gamma, Number, sin, cos, Mul, ITE, exp, Lt, tan, log,
+    Abs
+)
 
@@ -181,2 +184,26 @@
 
+def test_diff7():
+    x = Symbol('x')
+    expr = 2*exp(x*x)*x
+    subsd = {x: Number(0.2)}
+    ref_val = 2.2481512722555586
+    assert abs(expr.diff(x).subs(subsd).evalf() - ref_val) < 1e-15
+
+
+def test_diff8():
+    x = Symbol('x')
+    e = log(sin(x))
+    subsd = {x: Number(0.2)}
+    ref_val = 4.93315487558689
+    assert abs(e.diff(x).subs(subsd).evalf() - ref_val) < 4e-15
+
+
+def test_diff9():
+    x = Symbol('x')
+    absx = Abs(x)
+    assert abs(absx.diff(x).subs({x: Number(-.1)}).evalf() + 1) < 1e-16
+    assert abs(absx.diff(x).subs({x: Number(.1)}).evalf() - 1) < 1e-16
+    assert math.isnan(absx.diff(x).subs({x: Number(0)}).evalf())
+
+
 def test_repr():
@@ -183,0 +210,0 @@ x, y = map(Symbol, 'x y'.split())

README.rst

 pysym
 =====
 
-.. image:: http://hera.physchem.kth.se:8080/github.com/bjodah/pysym/status.svg?branch=master
-   :target: http://hera.physchem.kth.se:8080/github.com/bjodah/pysym
+.. image:: http://hera.physchem.kth.se:9090/api/badges/bjodah/pysym/status.svg
+   :target: http://hera.physchem.kth.se:9090/bjodah/pysym
    :alt: Build status
@@ -16,4 +16,4 @@ .. image:: https://img.shields.io/pypi/v/pysym.svg
    :alt: airspeedvelocity
-.. image:: http://hera.physchem.kth.se/~pysym/master/htmlcov/coverage.svg
-   :target: http://hera.physchem.kth.se/~pysym/master/htmlcov
+.. image:: http://hera.physchem.kth.se/~pysym/branches/master/htmlcov/coverage.svg
+   :target: http://hera.physchem.kth.se/~pysym/branches/master/htmlcov
    :alt: coverage
@@ -24,2 +24,3 @@
 It tries to stay compatible with the API of `SymPy <http://www.sympy.org>`_.
+It should be viewed as a prototype and not as a "production" package.
 
@@ -29,14 +30,12 @@ The capabilities include:
 - Differentiation
-- Numerical evaluation (including "lambdify" support)
+- (slow) numerical evaluation (including "lambdify" support)
 
 The above capabilities are exactly what is needed by
 `pyodesys <https://pypi.python.org/pypi/pyodesys>`_
-and `pyodesys <https://pypi.python.org/pypi/pyodesys>`_. The goal of pysym
-is to be a lightweight and fast (thanks to its specialization) alternative
-to SymPy when no other capabilities are needed (such as series expansion, integration,
-equation solving, etc.).
+and `pyneqsys <https://pypi.python.org/pypi/pyneqsys>`_.
 
 Documentation
 -------------
-Auto-generated API documentation is found here: `<https://bjodah.github.com/pysym>`_
+Autogenerated API documentation is found here: `<https://pythonhosted.org/pysym>`_
+(and dev docs are here: `<http://hera.physchem.kth.se/~pysym/branches/master/html>`_).
 
@@ -43,0 +42,0 @@ Installation

setup.cfg

@@ -9,2 +9,8 @@ [pytest]
 
+[upload_sphinx]
+upload-dir = doc/_build/html
+
+[bdist_wheel]
+universal = 1
+
 [egg_info]
@@ -11,0 +17,0 @@ tag_build =

setup.py

@@ -6,4 +6,3 @@ #!/usr/bin/env python
 import shutil
-import sys
-from setuptools import setup, Extension
+from setuptools import setup
 
@@ -15,20 +14,2 @@
 
-# Cythonize .pyx file if it exists (not in source distribution)
-ext_modules = []
-
-if len(sys.argv) > 1 and '--help' not in sys.argv[1:] and sys.argv[1] not in (
-        '--help-commands', 'egg_info', 'clean', '--version'):
-    USE_CYTHON = os.path.exists('pysym/_pysym.pyx')
-    ext = '.pyx' if USE_CYTHON else '.c'
-    ext_modules = [Extension(
-        'pysym._pysym',
-        ['pysym/_pysym'+ext]
-    )]
-    if USE_CYTHON:
-        from Cython.Build import cythonize
-        ext_modules = cythonize(ext_modules,
-                                # include_path=['./include'],
-                                gdb_debug=True)
-
-
 # http://conda.pydata.org/docs/build.html#environment-variables-set-during-the-build-process
@@ -82,3 +63,2 @@ if os.environ.get('CONDA_BUILD', '0') == '1':
     packages=[pkg_name] + tests,
-    ext_modules=ext_modules,
 )
@@ -85,0 +65,0 @@

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Worsened metrics

Total package byte prevSize

45873

-97.66%

Number of package files

22

-4.35%

Lines of code

1226

-0.33%