Add python3 guards

- fix pip deps on EL7
- disable wheel build on EL7

pyparsing.spec

@@ -1,7 +1,11 @@
+%if 0%{?fedora}
+%global with_python3 1
+%endif
+
 %global srcname pyparsing
 %global sum Python package with an object-oriented approach to text processing
 
-%global build_wheel 1
+%global build_wheel 0
 
 %global python2_wheelname %{srcname}-%{version}-py2.py3-none-any.whl
 %global python3_wheelname %python2_wheelname
@@ -19,15 +23,19 @@ BuildArch:      noarch
 BuildRequires:  dos2unix
 BuildRequires:  python2-devel
 BuildRequires:  python2-setuptools
+%if 0%{?with_python3}
 BuildRequires:  python3-devel
 BuildRequires:  python3-setuptools
+%endif
 
 %if 0%{?build_wheel}
 BuildRequires:  python2-pip
 BuildRequires:  python2-wheel
+%if 0%{?with_python3}
 BuildRequires:  python%{python3_pkgversion}-pip
 BuildRequires:  python%{python3_pkgversion}-wheel
 %endif
+%endif
 
 %description
 pyparsing is a module that can be used to easily and directly configure syntax
@@ -52,6 +60,7 @@ pyparsing is a module that can be used to easily and directly configure syntax
 definitions for any number of text parsing applications.
 
 
+%if 0%{?with_python3}
 %package -n python3-pyparsing
 Summary:        %{sum}
 %{?python_provide:%python_provide python3-%{srcname}}
@@ -61,6 +70,7 @@ pyparsing is a module that can be used to easily and directly configure syntax
 definitions for any number of text parsing applications.
 
 This is the Python 3 version.
+%endif
 
 
 %prep
@@ -75,37 +85,43 @@ dos2unix -k CHANGES LICENSE README
 %else
 %py2_build
 %endif
+%if 0%{?with_python3}
 %if 0%{?build_wheel}
 %py3_build_wheel
 %else
 %py3_build
 %endif
+%endif
 
 %install
 %if 0%{?build_wheel}
 %py2_install_wheel %{python2_wheelname}
 %else
 %py2_install
 %endif
+%if 0%{?with_python3}
 %if 0%{?build_wheel}
 %py3_install_wheel %{python3_wheelname}
 %else
 %py3_install
 %endif
+%endif
 
 
 %files -n python2-pyparsing
 %license LICENSE
 %doc CHANGES README
 %{python2_sitelib}/pyparsing.py*
-%{python2_sitelib}/pyparsing-*dist-info/
+%{python2_sitelib}/pyparsing-*
 
+%if 0%{?with_python3}
 %files -n python3-pyparsing
 %license LICENSE
 %doc CHANGES README LICENSE
 %{python3_sitelib}/pyparsing.py
 %{python3_sitelib}/__pycache__/*
-%{python3_sitelib}/pyparsing-*dist-info/
+%{python3_sitelib}/pyparsing-*
+%endif
 
 %files doc
 %license LICENSE