From 13e65dfd4f5a61d453dc42f0a0e8b1bf1885fbcb Mon Sep 17 00:00:00 2001
From: Jan Tattermusch <jtattermusch@google.com>
Date: Mon, 21 Sep 2015 09:30:49 -0700
Subject: import yaml module lazily

---
 tools/run_tests/port_server.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/tools/run_tests/port_server.py b/tools/run_tests/port_server.py
index d14c829fe0..acb6deaae6 100755
--- a/tools/run_tests/port_server.py
+++ b/tools/run_tests/port_server.py
@@ -37,7 +37,6 @@ import os
 import socket
 import sys
 import time
-import yaml
 
 argp = argparse.ArgumentParser(description='Server for httpcli_test')
 argp.add_argument('-p', '--port', default=12345, type=int)
@@ -118,6 +117,9 @@ class Handler(BaseHTTPServer.BaseHTTPRequestHandler):
       self.end_headers()
       self.wfile.write(_MY_VERSION)
     elif self.path == '/dump':
+      # yaml module is not installed on Macs and Windows machines by default
+      # so we import it lazily (/dump action is only used for debugging)
+      import yaml
       self.send_response(200)
       self.send_header('Content-Type', 'text/plain')
       self.end_headers()
-- 
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