python - File could not be opened because it is empty -

i want upload 2 images requests. creating function accepts request.files parameter , save both images.

the function :

def store_offer_images(files, **service_response):     """     stores images     """     create_diretory_if_not_exist()     lrg_img, sml_img = files.get('detail_image'), files.get('listing_image')      lrg_img_filename = service_response.get('content').get('offerid') + ".png"     sml_img_filename = service_response.get('content').get('offerid') + ".png"      sml_img.save(         os.path.join(config.normal_file_upload_folder, sml_img_filename))     lrg_img.save(         os.path.join(config.large_file_upload_folder, lrg_img_filename)) 

when trying save images. saves properly. files request.files , service_response kwargs.

when want open image in finder(os gui window), got message:

the file “b516f2dca72e4f559c3a72a1f48727a9.png” not opened because empty.

how can upload images?

edit:
when files in pdb, here response:

(pdb) files.get('detail_image') (pdb) <filestorage: u'python-640x444.png' ('image/png')> 

the model models request data is:

import datetime app_config import appconfig   class offer(object):     """     offer details     """      def __init__(self, form):         self.rest_api_time_format = appconfig().rest_api_time_format         self.title = form.get('title')         self.start_date = form.get('startson') + ' 00:00'         self.end_date = form.get('endson') + ' 23:59'         self.short_description = form.get('shortdescription')         self.long_description = form.get('longdescription')         self.outlets = form.getlist('outlets')         self.offer_value = form.get('offervalue')         self.offer_old_value = form.get('oldvalue')         self.currency = form.get('currency')      def add_offer_body(self):         """         return request body in json format         """         outlets_list = []         in self.outlets:             outlets_list.append({'code': i})          starts_on_date = datetime.datetime.strptime(             self.start_date, '%d/%m/%y %h:%m')         ends_on_date = datetime.datetime.strptime(             self.end_date, '%d/%m/%y %h:%m')          body = {             "outlets": outlets_list,             "title": self.title,             "shortdescription": self.short_description,             "longdescription": self.long_description,             "endson": ends_on_date.strftime(self.rest_api_time_format),             "startson": starts_on_date.strftime(self.rest_api_time_format),             "isactive": "true",         }          if self.offer_value not u'':             body['offervalue'] = {                 "value": self.offer_value,                 "currency": self.currency             }          if self.offer_old_value not u'':             body["offeroldvalue"] = {                 "value": self.offer_old_value,                 "currency": self.currency             }         return body      def __repr__(self):         return self.title 

the views.py is:

@portal.route('/admin/offers/add', methods=['post']) def add_offer():     """     return status of added offer     """     offer = offer(request.form)     if controller.valid_content(request.files):         service_response = controller.add_offer(offer)         if 'errors' in service_response:             message = str(service_response.get('errors')[0].get('message'))             flash("adding offer failed.!! " + message)             current_app.logger.error(                 'offer adding failed details' + str(request.form))             return redirect(url_for('portal.list_running_offers'))         else:             controller.store_offer_images(request.files, **service_response)             current_app.logger.info('user added offer successfully.')             flash("offer added successfully..!!")             return redirect(url_for('portal.list_running_offers'))     else:         flash("please upload images of mentioned resolution.!!")         return render_template(             'addoffer.jinja', body=offer.add_offer_body(), help=help_messages) 

the html is:

{% extends "base.jinja" %}  {% block script %}     <script type="text/javascript" src="static/js/addoffer.js"></script>     <script type="text/javascript" src="static/js/bootstrap-datepicker.min.js"></script>      <link href="static/css/datepicker.css" rel="stylesheet">   {% endblock %}   {% block title %}     add offer {% endblock %}   {% block content %}     <legend><h1>         add offer     </h1></legend>     <br>       <div class="row">         <div class="col-md-1"></div>         <div class="col-md-10">             <form id="offerform"enctype="multipart/form-data" class="form-horizontal" action="{{ url_for('portal.add_offer') }}" data-toggle="validator" role="form" method="post">  <div class="form-group">                 <label class="control-label col-xs-3" for="file">offer listing image *</label>                 <div class="col-xs-7 input-group">                     <input id="image" type="file" class="form-control" name="listing_image" accept="image/x-png" data-error="{{help.listing_image}}" required>                     <span class="help-block with-errors">{{help.listing_image}}</span>                  </div>             </div>                  <div class="form-group">                     <label class="control-label col-xs-3" for="file">offer detail image *</label>                     <div class="col-xs-7 input-group">                         <input id="image" type="file" class="form-control" name="detail_image" accept="image/x-png"                          data-error="{{help.detail_image}}" required>                         <span class="help-block with-errors">{{help.detail_image}}</span>                      </div>                 </div>  </form>         </div>         <div class="col-md-1"></div></div>     </div> {% endblock %} 

i fixed problem. happening because if perform operation on image, move pointer @ last, when save image, start saving image pointer is, @ last. saved image empty.

now fixed move pointers beginning. here sample code did:

if img not none , img.filename != u'':             img.seek(0, os.seek_end)             size = img.tell()             imgs = image.open(img)             res = imgs.size             img.seek(0)