package/python-mpmath: new package

mpmath is a free (BSD licensed) Python library for real and
complex floating-point arithmetic with arbitrary precision.

https://mpmath.org/

Signed-off-by: Julien Olivain <ju.o@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

support/testing/tests/package/sample_python_mpmath.py

@@ -0,0 +1,16 @@
+#! /usr/bin/env python3
+
+# Test inspired from example published on the project page:
+# https://mpmath.org/
+
+from mpmath import mp
+
+mp.dps = 50
+
+result = mp.quad(lambda x: mp.exp(-x**2), [-mp.inf, mp.inf]) ** 2
+
+# Pi digits can be cross-checked here:
+# https://www.angio.net/pi/digits.html
+expected_result = "3.1415926535897932384626433832795028841971693993751"
+
+assert str(result) == expected_result