Add new package: py-cantoolz (#18812)

* Add new package: py-cantoolz

* refine depends

var/spack/repos/builtin/packages/py-cantoolz/package.py

@@ -0,0 +1,26 @@
+# Copyright 2013-2020 Lawrence Livermore National Security, LLC and other
+# Spack Project Developers. See the top-level COPYRIGHT file for details.
+#
+# SPDX-License-Identifier: (Apache-2.0 OR MIT)
+
+from spack import *
+
+
+class PyCantoolz(PythonPackage):
+    """CANToolz is a framework for analysing CAN networks and devices.
+    It provides multiple modules that can be chained using CANToolz's
+    pipe system and used by security researchers, automotive/OEM
+    security testers in black-box analysis."""
+
+    homepage = "https://github.com/CANToolz/CANToolz/"
+    url      = "https://github.com/CANToolz/CANToolz/archive/v3.7.0.tar.gz"
+
+    version('3.7.0', sha256='36f5e8aa407e5c82abe84fb190ddd45ed12887ee833f06ef5eb78504017f0e5d')
+    version('3.6.1', sha256='e40c712b726f1caaca16b0d0e0b3aeadd01426944663ba0dce5c47a340304e29')
+
+    depends_on('py-setuptools', type='build')
+    depends_on('py-bitstring',  type=('build', 'run'))
+    depends_on('py-flask',    type=('build', 'run'))
+    depends_on('py-pyserial', type=('build', 'run'))
+    depends_on('py-mido',     type=('build', 'run'))
+    depends_on('py-numpy',    type=('build', 'run'))