设置头像时，没有选择图片点击提交代码提示错误信息

[Aben]

<code>Traceback (most recent call last):
File "/base/python_runtime/python_lib/versions/1/google/appengine/ext/webapp/__init__.py", line 513, in __call__
handler.post(*groups)
File "/base/data/home/apps/v2ex/1.345911815543573714/member.py", line 502, in post
avatar_73 = images.resize(avatar, 73, 73)
File "/base/python_runtime/python_lib/versions/1/google/appengine/api/images/__init__.py", line 643, in resize
image = Image(image_data)
File "/base/python_runtime/python_lib/versions/1/google/appengine/api/images/__init__.py", line 114, in __init__
raise NotImageError("Empty image data.")
<em>NotImageError: Empty image data.</em>
</code>

可以直观点。

[Aben]

额，好吧，我还是先读一下v2ex的使用手册...