add patch

pip-allow-older-versions.patch

@@ -0,0 +1,27 @@
+--- /usr/bin/pip3	2019-11-12 17:37:34.793131862 +0100
++++ pip3	2019-11-12 17:40:42.014107134 +0100
+@@ -2,7 +2,23 @@
+ # -*- coding: utf-8 -*-
+ import re
+ import sys
+-from pip._internal.cli.main import main
++
++try:
++    from pip._internal.cli.main import main
++except ImportError:
++    try:
++        from pip._internal.main import main
++    except ImportError:
++        try:
++            # If the user has downgraded pip, the above import will fail.
++            # Let's try older methods of invoking it:
++
++            # pip 19 uses this
++            from pip._internal import main
++        except ImportError:
++            # older pip versions use this
++            from pip import main
++
+ if __name__ == '__main__':
+     sys.argv[0] = re.sub(r'(-script\.pyw|\.exe)?$', '', sys.argv[0])
+     sys.exit(main())

python-pip.spec

@@ -7,7 +7,7 @@ pip is the package installer for Python. You can use pip to install packages fro
 %global bashcompdir %(b=$(pkg-config --variable=completionsdir bash-completion 2>/dev/null); echo ${b:-%{_sysconfdir}/bash_completion.d})
 Name:           python-%{srcname}
 Version:        20.2.2
-Release:        1
+Release:        2
 Summary:        A tool for installing and managing Python packages
 License:        MIT and Python and ASL 2.0 and BSD and ISC and LGPLv2 and MPLv2.0 and (ASL 2.0 or BSD)
 URL:            http://www.pip-installer.org
@@ -17,6 +17,7 @@ Patch1:         allow-stripping-given-prefix-from-wheel-RECORD-files.patch
 Patch2:         emit-a-warning-when-running-with-root-privileges.patch
 Patch3:         remove-existing-dist-only-if-path-conflicts.patch
 Patch6000:      dummy-certifi.patch
+Source10: 	pip-allow-older-versions.patch
 
 %description %{_description}
 
@@ -86,9 +87,9 @@ popd
 %endif
  
 # before we ln -s anything, we apply Source10 patch to all pips:
-#for PIP in %{buildroot}%{_bindir}/pip*; do
-#%  patch -p1 --no-backup-if-mismatch $PIP < %{SOURCE10}
-#done
+for PIP in %{buildroot}%{_bindir}/pip*; do
+  patch -p1 --no-backup-if-mismatch $PIP < %{SOURCE10}
+done
  
 mkdir -p %{buildroot}%{bashcompdir}
 PYTHONPATH=%{buildroot}%{python3_sitelib} \
@@ -139,6 +140,9 @@ install -p dist/%{python_wheelname} -t %{buildroot}%{python_wheeldir}
 %{python_wheeldir}/%{python_wheelname}
 
 %changelog
+* Tue Sep 1 2020 wenzhanli<wenzhanli2@huawei.com> - 20.2.2-2
+- add pip-allow-older-versions.patch
+
 * Tue Aug 25 2020 wenzhanli<wenzhanli2@huawei.com> - 20.2.2-1
 - update to 20.2.2 and add python2 require