--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/planemo/lib/python3.7/site-packages/pip/_internal/utils/virtualenv.py	Fri Jul 31 00:32:28 2020 -0400
@@ -0,0 +1,34 @@
+import os.path
+import site
+import sys
+
+
+def running_under_virtualenv():
+    # type: () -> bool
+    """
+    Return True if we're running inside a virtualenv, False otherwise.
+
+    """
+    if hasattr(sys, 'real_prefix'):
+        # pypa/virtualenv case
+        return True
+    elif sys.prefix != getattr(sys, "base_prefix", sys.prefix):
+        # PEP 405 venv
+        return True
+
+    return False
+
+
+def virtualenv_no_global():
+    # type: () -> bool
+    """
+    Return True if in a venv and no system site packages.
+    """
+    # this mirrors the logic in virtualenv.py for locating the
+    # no-global-site-packages.txt file
+    site_mod_dir = os.path.dirname(os.path.abspath(site.__file__))
+    no_global_file = os.path.join(site_mod_dir, 'no-global-site-packages.txt')
+    if running_under_virtualenv() and os.path.isfile(no_global_file):
+        return True
+    else:
+        return False