# DP: Disable ensurepip in Debian for now.

Index: b/Lib/ensurepip/__init__.py
===================================================================
--- a/Lib/ensurepip/__init__.py
+++ b/Lib/ensurepip/__init__.py
@@ -12,6 +12,21 @@ import tempfile
 
 __all__ = ["version", "bootstrap"]
 
+def _ensurepip_is_disabled_in_debian():
+    if True:
+        print ('''\
+ensurepip is disabled in Debian/Ubuntu for the system python.
+
+Python modules For the system python are usually handled by dpkg and apt-get.
+
+    apt-get install python-<module name>
+
+Install the python-pip package to use pip itself.  Using pip together
+with the system python might have unexpected results for any system installed
+module, so use it on your own risk, or make sure to only use it in virtual
+environments.
+''')
+        sys.exit(1)
 
 _PROJECTS = [
     ("setuptools"),
@@ -33,6 +48,7 @@ def version():
     """
     Returns a string specifying the bundled version of pip.
     """
+    _ensurepip_is_disabled_in_debian()
     whl_name = 'pip'
     wheel_names = glob.glob('/usr/share/python-wheels/%s-*.whl' % whl_name)
     if len(wheel_names) == 1:
@@ -76,6 +92,7 @@ def _bootstrap(root=None, upgrade=False,
 
     Note that calling this function will alter both sys.path and os.environ.
     """
+    _ensurepip_is_disabled_in_debian()
     if altinstall and default_pip:
         raise ValueError("Cannot use altinstall and default_pip together")