英文改中文，增加了文件选择的错误异常抛出

main.py

@@ -0,0 +1,11 @@
+import pyfiglet # 程序greet
+
+# 程序greet
+print(">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>")
+greet = pyfiglet.figlet_format("File Secure Transfer", font="slant" , width=250)
+print(greet)
+print("                                                             <For Secure And Fast File Transfer>")
+author = "                                                       <-Made By Li-Nuo-Cheng Tan-Jun-Wen Ren-Qing-Yu->"
+print(author)
+print("<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<")
+print(pyfiglet.FigletFont.getFonts())

sender/sender.py

@@ -1,7 +1,7 @@
 # 模式，文件，自己的公钥从哪里来，别人的公钥从哪里来
 import base64
 import os
-from Tools.scripts.abitype import get_fields
+
 
 from entity.Letter import Letter
 from itsdangerous import base64_encode
@@ -19,6 +19,8 @@ letterMode = ""
 letterSymKey = b""
 
 def main():
+
+
     letter = Letter()
     # 用户输入各种数据填充letter字段
     path = selectFile()