Update documentation

README.md

@@ -74,6 +74,9 @@ run(model_fn, train_input_fn, eval_input_fn=None)
 add_flag(name, *args, **kwargs)
     Add a flag.
 
+    Added flags can be accessed by `FLAGS` global variable.
+    (e.g. `FLAGS.my_flag_name`)
+
     Args:
         name: Flag name. Real flag name will be `"--{}".format(name)`.
         *args, **kwargs: The rest arguments are the same as

docs/qnd/index.html

@@ -1053,6 +1053,8 @@ <h2 class="section-title" id="header-functions">Functions</h2>
 
 
     <div class="desc"><p>Add a flag.</p>
+<p>Added flags can be accessed by <code>FLAGS</code> global variable.
+(e.g. <code>FLAGS.my_flag_name</code>)</p>
 <p>Args:
     name: Flag name. Real flag name will be <code>"--{}".format(name)</code>.
     <em>args, </em>*kwargs: The rest arguments are the same as
@@ -1063,6 +1065,9 @@ <h2 class="section-title" id="header-functions">Functions</h2>
     <pre><code>def add_flag(name, *args, **kwargs):
     """Add a flag.
 
+    Added flags can be accessed by `FLAGS` global variable.
+    (e.g. `FLAGS.my_flag_name`)
+
     Args:
         name: Flag name. Real flag name will be `"--{}".format(name)`.
         *args, **kwargs: The rest arguments are the same as