human
Solve the following python programming problem given the following code:
@ csrf_exempt 
def upload(request) : 
    if (request.method == 'GET') : 
        return index (request) 
data = { 
        'warning' : [], 
} 
    form = UploadForm (request.POST, request.FILES) 
    if (not form.is_valid ()) : 
        errors = (form ['image'].errors or form.errors) 
        return json_error (request, 'upload', action = 'uploading file', errors = [force_unicode (w)]) 
form_data = form.cleaned_data 
    is_standalone = bool (form_data.get ('standalone')) 
    orig_file_path = form_data ['image'].name 
    if (six.PY2 and isinstance (orig_file_path, unicode)) : 
        orig_file_path = orig_file_path.encode ('utf-8') 
orig_image = get_relative_media_url (orig_file_path) 
    img = PIL.Image.open (orig_file_path) 
    (w, h) = (orig_w, orig_h) = img.size 
    if (is_animated_gif (img) and (not has_animated_gif_support ())) : 
        data ['warning'].append ('This server does not have animated gif support.
your uploaded image has been made static.') 
tmp_image = Image (image = orig_image) 
    preview_w = (form_data.get ('preview_width') or PREVIEW_WIDTH) 
    preview_h = (form_data.get ('preview_height') or PREVIEW_HEIGHT) 
    resize_ratio = min ((preview_w / w), (preview_h / h)) 
    def fit_preview(im) : 
        (w, h) = im.size 
        if (resize_ratio < 1) : 
            w = int (round ((w * resize_ratio))) 
            h = int (round ((h * resize_ratio))) 
            preview_img = im.resize ((w, h), PIL.Image.ANTIALIAS) 
else : 
            preview_img = im 
return preview_img 
if (not is_standalone) : 
        preview_file_path = tmp_image.get_image_path ('_preview') 
        process_image (img, preview_file_path, fit_preview) 
data.update ({ 
        'crop' : { 
            'orig_image' : orig_image, 
            'orig_w' : orig_w, 
            'orig_h' : orig_h, 
            'image_id' : None, 
}, 
        'url' : tmp_image.get_image_url ('_preview'), 
        'orig_image' : orig_image, 
        'orig_w' : orig_w, 
        'orig_h' : orig_h, 
        'width' : w, 
       ...

    
    

    Fix the buggy line: return json_error (request, 'upload', action = 'uploading file', errors = [force_unicode (w)])
assistant
#Here is Python program to fix the buggy line: return json_error (request, 'upload', action = 'uploading file', errors = [force_unicode (w)])
.

return json_error (request, 'upload', action = 'uploading file', errors = [force_unicode (errors)])