On further looking i have found an example code room_data.py that generates an inputbox. You can use tkinter library to do this. The code example is as below:

import tkinter as tk

def generate_window(project):

    class Window(tk.Frame):
        def __init__(self, master=None):
            tk.Frame.__init__(self, master)

            self.project = project
            self.project_folder = project.path
            self.text_entry = ''
            self.master = master
            self.init_window()

        # Creation of init_window
        def init_window(self):

            # changing the title of our master widget
            self.master.title("Input text")
            self.master.columnconfigure(0, weight=1)
            self.master.rowconfigure(0, weight=1)
            self.master.grid()

            print(self.project_folder)
            tk.Label(self, text=' ').grid(row=7, sticky=tk.W)

            tk.Label(self, text='Text will be returned in the console').grid(row=8, sticky=tk.W)
            tk.Label(self, text='Enter the text below:').grid(row=9, sticky=tk.W)

            self.text_entry_box = tk.Entry(self)
            self.text_entry_box.insert(0, self.text_entry)
            self.text_entry_box.grid(row=10, sticky='ew')
            tk.Label(self, text=' ').grid(row=11, sticky=tk.W)

            # creating a button instance
            tk.Button(self, text="Return text", command=self.return_text).grid(row=12, sticky=tk.W)

            self.columnconfigure(0, weight=1)
            self.grid(row=0, column=0, sticky='nsew')

        def return_text(self):
            self.text_entry = self.text_entry_box.get()
            print('Text entered = ' + self.text_entry)


    root = tk.Tk()
    app = Window(root)
    root.mainloop()

if __name__ == '__main__':
    project = iesve.VEProject.get_current_project()

    generate_window(project)