Update app.py

app.py

@@ -637,8 +637,8 @@ def upload_pdf(key, text, file):
     if not key or not text or not file:
         return "两个输入都不能为空，请输入字符并上传 PDF 文件！"
     # 判断PDF文件
-    if file and file.name.split(".")[-1].lower() != "pdf":
-        return '请勿上传非 PDF 文件！'
+    #if file and file.name.split(".")[-1].lower() != "pdf":
+    #    return '请勿上传非 PDF 文件！'
     else:
         section_list = text.split(',')
         paper_list = [Paper(path=file, sl=section_list)]
@@ -689,7 +689,7 @@ Use ChatGPT to summary the papers.Star our Github [🌟ChatPaper](https://github
 ip = [
     gradio.inputs.Textbox(label="请输入你的API-key(必填)", default="", type='password'),
     gradio.inputs.Textbox(label="请输入论文大标题索引(用英文逗号隔开,必填)", default="'Abstract,Introduction,Related Work,Background,Preliminary,Problem Formulation,Methods,Methodology,Method,Approach,Approaches,Materials and Methods,Experiment Settings,Experiment,Experimental Results,Evaluation,Experiments,Results,Findings,Data Analysis,Discussion,Results and Discussion,Conclusion,References'"),
-    gradio.inputs.File(label="请上传论文PDF(必填)")
+    gradio.inputs.File(label="请上传论文PDF(必填)", file_types=['.pdf'])
 ]
 
 chatpaper_gui = gradio.Interface(fn=upload_pdf, inputs=ip, outputs="html", title=title, description=description)