encode request data if it is in unicode/str type

httprunner/utils.py

@@ -196,13 +196,13 @@ def get_imported_module(module_name):
 def get_imported_module_from_file(file_path):
     """ import module from python file path and return imported module
     """
-
     if is_py3:
         imported_module = importlib.machinery.SourceFileLoader(
             'module_name', file_path).load_module()
-    else:
-        # Python 2.7
+    elif is_py2:
         imported_module = imp.load_source('module_name', file_path)
+    else:
+        raise RuntimeError("Neither Python 3 nor Python 2.")
 
     return imported_module