!2 Init python-bitmath to support OpenStack-W

From: @huangtianhua
Reviewed-by: @shinwell_hu
Signed-off-by: @shinwell_hu

python-bitmath.spec

@@ -0,0 +1,75 @@
+%global _empty_manifest_terminate_build 0
+Name:           python-bitmath
+Version:        1.3.3.1
+Release:        1
+Summary:        Pythonic module for representing and manipulating file sizes with different prefix notations (file size unit conversion)
+License:        MIT
+URL:            https://github.com/tbielawa/bitmath
+Source0:        https://files.pythonhosted.org/packages/source/b/bitmath/bitmath-%{version}.tar.gz  
+BuildArch:      noarch
+%description
+simplifies many facets of interacting with file sizes in various units.
+
+%package -n python3-bitmath
+Summary:        Pythonic module for representing and manipulating file sizes with different prefix notations (file size unit conversion)
+Provides:       python-bitmath
+# Base build requires
+BuildRequires:  python3-devel
+BuildRequires:  python3-setuptools
+BuildRequires:  python3-pbr
+BuildRequires:  python3-pip
+BuildRequires:  python3-wheel
+%description -n python3-bitmath
+simplifies many facets of interacting with file sizes in various units.
+
+%package help
+Summary:        Pythonic module for representing and manipulating file sizes with different prefix notations (file size unit conversion)
+Provides:       python3-bitmath-doc
+%description help
+simplifies many facets of interacting with file sizes in various units.
+
+%prep
+%autosetup -n bitmath-%{version} -S git
+
+%build
+%py3_build
+
+%install
+%py3_install
+
+install -d -m755 %{buildroot}/%{_pkgdocdir}
+if [ -d doc ]; then cp -arf doc %{buildroot}/%{_pkgdocdir}; fi
+if [ -d docs ]; then cp -arf docs %{buildroot}/%{_pkgdocdir}; fi
+if [ -d example ]; then cp -arf example %{buildroot}/%{_pkgdocdir}; fi
+if [ -d examples ]; then cp -arf examples %{buildroot}/%{_pkgdocdir}; fi
+pushd %{buildroot}
+if [ -d usr/lib ]; then
+    find usr/lib -type f -printf "/%h/%f\n" >> filelist.lst
+fi
+if [ -d usr/lib64 ]; then
+    find usr/lib64 -type f -printf "/%h/%f\n" >> filelist.lst
+fi
+if [ -d usr/bin ]; then
+    find usr/bin -type f -printf "/%h/%f\n" >> filelist.lst
+fi
+if [ -d usr/sbin ]; then
+    find usr/sbin -type f -printf "/%h/%f\n" >> filelist.lst
+fi
+touch doclist.lst
+if [ -d usr/share/man ]; then
+    find usr/share/man -type f -printf "/%h/%f.gz\n" >> doclist.lst
+fi
+popd
+mv %{buildroot}/filelist.lst .
+mv %{buildroot}/doclist.lst .
+
+%files -n python3-bitmath -f filelist.lst
+
+%dir %{python3_sitelib}/*
+
+%files help -f doclist.lst
+%{_docdir}/*
+
+%changelog
+* Thu Jul 15 2021 OpenStack_SIG <openstack@openeuler.org> - 1.3.3.1-1
+- Package Spec generate