Issue #7328: don't corrupt sys.path when running pydoc with the -m switch

2 files changed, 9 insertions, 5 deletions

diff --git a/Lib/pydoc.py b/Lib/pydoc.py
index 57071a1..7da75b6 100755
--- a/Lib/pydoc.py
+++ b/Lib/pydoc.py
@@ -2254,11 +2254,13 @@ def cli():
     import getopt
     class BadUsage: pass
 
-    # Scripts don't get the current directory in their path by default.
-    scriptdir = os.path.dirname(sys.argv[0])
-    if scriptdir in sys.path:
-        sys.path.remove(scriptdir)
-    sys.path.insert(0, '.')
+    # Scripts don't get the current directory in their path by default
+    # unless they are run with the '-m' switch
+    if '' not in sys.path:
+        scriptdir = os.path.dirname(sys.argv[0])
+        if scriptdir in sys.path:
+            sys.path.remove(scriptdir)
+        sys.path.insert(0, '.')
 
     try:
         opts, args = getopt.getopt(sys.argv[1:], 'gk:p:w')
diff --git a/Misc/NEWS b/Misc/NEWS
index 2f55a67..041f2a7 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -429,6 +429,8 @@ Core and Builtins
 Library
 -------
 
+- Issue #7328: pydoc no longer corrupts sys.path when run with the '-m' switch
+
 - Issue #2054: ftplib now provides an FTP_TLS class to do secure FTP using
   TLS or SSL.  Patch by Giampaolo Rodola'.