Mercurial > cpython-lru_cache-weakref
diff Modules/mathmodule.c @ 57756:b206ad8cf5bf legacy-trunk
Issue #3366: Add expm1 function to math module. Thanks Eric Smith for
testing on Windows.
| author | Mark Dickinson <dickinsm@gmail.com> |
|---|---|
| date | Wed, 16 Dec 2009 20:13:40 +0000 |
| parents | cb22eaee86c9 |
| children | d350afc337dc |
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--- a/Modules/mathmodule.c Wed Dec 16 11:49:46 2009 +0000 +++ b/Modules/mathmodule.c Wed Dec 16 20:13:40 2009 +0000 @@ -53,6 +53,7 @@ */ #include "Python.h" +#include "_math.h" #include "longintrepr.h" /* just for SHIFT */ #ifdef _OSF_SOURCE @@ -686,6 +687,10 @@ "cosh(x)\n\nReturn the hyperbolic cosine of x.") FUNC1(exp, exp, 1, "exp(x)\n\nReturn e raised to the power of x.") +FUNC1(expm1, m_expm1, 1, + "expm1(x)\n\nReturn exp(x)-1.\n" + "This function avoids the loss of precision involved in the direct " + "evaluation of exp(x)-1 for small x.") FUNC1(fabs, fabs, 0, "fabs(x)\n\nReturn the absolute value of the float x.") FUNC1(floor, floor, 0, @@ -1420,6 +1425,7 @@ {"cosh", math_cosh, METH_O, math_cosh_doc}, {"degrees", math_degrees, METH_O, math_degrees_doc}, {"exp", math_exp, METH_O, math_exp_doc}, + {"expm1", math_expm1, METH_O, math_expm1_doc}, {"fabs", math_fabs, METH_O, math_fabs_doc}, {"factorial", math_factorial, METH_O, math_factorial_doc}, {"floor", math_floor, METH_O, math_floor_doc},