[Solved] Print a sentence with placeholder and function from an external file. Problem with importing forms, using and retrieving content

Move the dictionaries in dicts.py and create a class in template.py to return required template.You can create as many templates as you want in templates.py.

dicts.py

teams = {...}
   
nouns = {...}

article_words = {...}

template.py

from grammer import getArticle
import random

class Template():

    def __init__(self,**kwargs):
        self.__dict__.update(kwargs)

        # must define other variables like article which are used
        # in templates irrespective of the arguments passed

        if self.subject:
            self.article = getArticle(subject=self.subject)

    def return_template(self):
        test_template_list = ["Bla bla bla {subject} {article}", "Again bla bla bla {subject}"]
        test_template = random.choice(test_template_list)

        place_holders = ['{subject}','{article}', ]

        for i in place_holders:
            if i in test_template:
                test_template=test_template.replace(i,(self.__dict__[i.lstrip("{").rstrip("}")]))
        
        return test_template

grammer.py

from dicts import article_words, nouns

def getArticle(subject):
    for key, value in article_words.items():
        if nouns[subject] == value:
            return key

main.py

from tkinter import *
from tkinter import ttk
from template import Template
from dicts import teams

root = Tk()
root.geometry("420x150")

tournament=ttk.Combobox(root, width = 18)
tournament.place(x=15, y=15)
tournament['value'] = ["Serie A", "Serie B"]
tournament.set("Tournament")

def on_tournament_selected(event):
    team.delete(0,'end') 

    req_teams = [] 
    sel_tournament = tournament.get() 

    for key,value in teams.items():
        if value['Tournament'] == sel_tournament:
            req_teams.append(key)

    team.config(values=req_teams)

tournament.bind("<<ComboboxSelected>>", on_tournament_selected)

team=ttk.Combobox(root, width = 18)
team.place(x=215, y=15)
team.set("Teams")

text = Text(root,width=43,height=2)
text.place(x=15, y=50)

def printTeam():
    template1 = Template(subject=team.get()) # pass keyword arguments
    text.insert(END, template1.return_template())

button2 = Button(root, text="Print", command = printTeam)
button2.pack()
button2.place(x=15, y=100)

root.mainloop()

The error was due to circular imports in your files.