Let the python path as parameter

nogil_test/basic_test.py

@@ -2,9 +2,9 @@ import subprocess
 import importlib
 import json
 
-def run(env):
+def run(env, python_path):
   # Build the extension when installing the Cython in slapos
-  # subprocess.call(['python3', 'nogil_extension.py', 'build_ext', '--inplace'], env=env)
+  # subprocess.call([python_path, 'nogil_extension.py', 'build_ext', '--inplace'], env=env)
   source = ''
   failure_count = 0
   try:

nogil_test/lwan_coro_test.py

@@ -4,10 +4,10 @@ import importlib
 import sys
 import build_extension
 
-def run(env):
+def run(env, python_path):
   # build the extension
-  build_extension.build_ext(env)
-  source = subprocess.check_output(["python3 -c 'import wrapper; wrapper.main()'"],
+  # build_extension.build_ext(env)
+  source = subprocess.check_output([python_path + " -c 'import wrapper; wrapper.main()'"],
           cwd='./cython_lwan_coro/',
           env=env,
           shell=True,