You called this URL via POST, but the URL doesn't end in a slash and you have APPEND_SLASH

错误信息如下:

RuntimeError at /picload
You called this URL via POST, but the URL doesn't end in a slash and you have APPEND_SLASH set. 
Django can't redirect to the slash URL while maintaining POST data. Change your form to point 

to 127.0.0.1:8000/picload/ (note the trailing slash), or set APPEND_SLASH=False in your Django settings.

表单字段action以'/'结尾，(action="/picsave/)，尝试修改settings文件，设置了APPEND_SLASH = False属性，

bug仍存在。最后将 应用的 urls中对应的路径末去掉'/'，(r'^picsave/$'，去掉表达式中的'/')，bug修复。
PS：仔细了解APP中urls路径配置详细规则