python 3.x - unexpected text file output <_io.TextIOWrapper.... encoding='cp1252'> -

when run following code following output instead of file's text:

list of children's names in whatever group in alphabetical order: <_io.textiowrapper name='whatever.txt' mode='a' encoding='cp1252'>
easygui import*

i run script , using buttonboxes register children , create groups. add children groups using choiceboxes. problem arises when use 'list of children in each group' option , don't know what's causing nor how fix it. appreciated.

from easygui import*   def register_child():     enter1 = enterbox(msg="enter child's first name.", title=' ', default='',                       strip=true, image=none, root=none)     if enter1 none:         main()         return     else:         while enter1 == "" or enter1.isalpha() == false:             enter1 = enterbox(msg="invalid entry. please enter child's first name using letters only.",                               title=' ', default='', strip=true, image=none, root=none)      enter2 = enterbox(msg="enter child's last name.", title=' ', default='',                       strip=true, image=none, root=none)  # ask user enter child's first name      if enter2 none:         main()         return     else:         while enter2 == "" or enter2.isalpha() == false:             enter2 = enterbox(msg="invalid entry. please enter child's last name using letters only.",                               title=' ', default='', strip=true, image=none,                               root=none)      child_name = (enter1 + " " + enter2).title()     file = open("children.txt", 'a')     file.write(child_name + "\n")     file.close()      register_more_child = ccbox("would register child?", "please choose option.")     if register_more_child == 1:         register_child()         return     elif register_more_child == 0:         main()         return   def list_children():     file = open("children.txt", 'r')  # open children.txt file     linelist = file.readlines()     linelist.sort()  # sort list alphabetically     # display list     print("list of children's names in alphabetical order:")     line in linelist:         print(line, end="")     file.close()     main()   def list_groups():     file = open("groups.txt", 'r')  # open children.txt file     linelist = file.readlines()     linelist.sort()  # sort list alphabetically     # display list     print("list of groups' names in alphabetical order:")     line in linelist:         print(line, end="")         file.close()     main()     return   def children_in_group():     file = open("groups.txt", 'r')     linelist = [line.strip() line in file]     choice = choicebox("which group display?", "choose group.",                        choices=(linelist))     file.close()      file1 = open('%s.txt' % choice, 'r')     line_list = file1.readlines()     line_list.sort()  # sort list alphabetically     # display list     print("list of children's names in " + choice + " group in alphabetical order:")     line in line_list:         print(line, end="")         file1.close()         main()   def add_child_to_group():     file = open("children.txt", 'r')  # open children.txt file     linelist = file.readlines()     file.close()     # linelist.sort()     choice1 = choicebox('choose child enter group.', 'add child group. ', choices=linelist)     if choice1 none:         main()         return      else:         file = open("groups.txt", 'r')         linelist = [line.strip() line in file]          choice2 = choicebox("which group add children to?", "choose group.",                             choices=linelist)         file.close()          file1 = open('%s.txt' % choice2, 'a')         file1.write(str(file1) + "\n")         file1.close()         add_more_children_to_groups = ccbox("would add child group?", "please choose option.")         if add_more_children_to_groups == 1:             add_child_to_group()             return         elif add_more_children_to_groups == 0:             main()             return   def create_group():     enter = enterbox(msg="enter group's name.", title='create group ')     file = open("groups.txt", 'a')     file.write(enter + "\n")     file.close()      file = open('%s.txt' % enter, 'w')     file.close()      more_groups = ccbox("would create group?", "please choose option.")     if more_groups == 1:         create_group()         return     else:         main()         return   def children_menu():     title2 = "children."     children_menu = ["1: register child.", "2: list of registered children."]     button = buttonbox("choose option", title2, choices=children_menu)     if button == children_menu[0]:         register_child()     if button == children_menu[1]:  # user chooses option 2 children menu:         list_children()   def group_menu():     title3 = "groups."     groups_menu = ["1: create group.", "2: list of groups.", "3: add child group.",                     "4: list of children in each group."]     button = buttonbox("choose option", title3, choices=groups_menu)     if button == groups_menu[0]:         create_group()      if button == groups_menu[1]:         list_groups()      if button == groups_menu[2]:         add_child_to_group()      if button == groups_menu[3]:         children_in_group()   def main():     title1 = "main menu."     main_menu = ["1: children", "2: groups", "3: educators", "4: tags", "5: cancel"]     button = buttonbox("choose option", title1, choices=main_menu)      if button == main_menu[0]:         children_menu()      elif button == main_menu[1]:         group_menu()      elif button == main_menu[2]:         title4 = "educators."         educator_menu = ["1: register educator.", "2: list of registered educators."]         button = buttonbox("choose option", title4, choices=educator_menu)      elif button == main_menu[3]:         button = "4"         title4 = "tags."         tags_menu = ["1: create tags", "2: list of tags."]         button = buttonbox("choose option", title4, choices=tags_menu)      else:         print("you cancelled.")         return  main()