Add.py

try:
    from tkinter import *
    from tkinter import ttk
except ImportError:
    from Tkinter import *
    import ttk

import json
import encode

LABEL_FONT = ("Monospace", 12)
BUTTON_FONT = ("Sans-Serif", 10, "bold")
INFO_FONT = ("Verdana", 12)


class AddWindow(Toplevel):

    """docstring for Login"""

    def __init__(self, *args):
        Toplevel.__init__(self, *args)

        self.title("Add Credentials")
        self.setFrames()

    def setFrames(self, **kwargs):
        add = Frame(self, padx=2, pady=2, bd=3)
        add.pack()

        Label(add, text="Service *", width=30, bd=3, font=LABEL_FONT).pack()
        service = ttk.Entry(add)
        service.pack()

        Label(add, text="Username", width=30, bd=3, font=LABEL_FONT).pack()
        username = ttk.Entry(add)
        username.pack()

        Label(add, text="Password *", width=30, bd=3, font=LABEL_FONT).pack()
        password = ttk.Entry(add, show="*")
        password.pack()

        # Adding special bind tag for bind event
        tag = "Submit"
        for elm in (username, password, service):
            elm.bindtags((tag,) + elm.bindtags())

        # Checkout
        # http://stackoverflow.com/questions/11456631/how-to-capture-events-on-tkinter-child-widgets
        self.bind_class(tag, '<Return>', lambda _: self.addClicked(
            info=info, username=username, password=password,
            service=service))

        s = ttk.Style()
        s.configure("Submit.TButton", font=BUTTON_FONT, sticky="s")

        # label for spacing
        info = Label(add, width=30, bd=3, fg="red", font=INFO_FONT)
        info.pack()

        addBtn = ttk.Button(add, text="Add to Manager", style="Submit.TButton",
                            command=lambda: self.addClicked(
                                info=info, username=username,
                                password=password, service=service))

        addBtn.pack()

    def addClicked(self, **kwargs):

        fileName = ".data"
        # Writing encoding data to file
        if(kwargs['password'].get() != "" and kwargs['service'].get() != ""):
            data = None
            details = [kwargs['username'].get(),
                       encode.encode(kwargs['password'].get())]

            # Reading initally present data
            try:
                with open(fileName, "r") as outfile:
                    data = outfile.read()
            except IOError:
                # Create a file if it doesn't exits
                open(fileName, "a").close()

            # Loading new data
            if data:
                data = json.loads(data)
                data[kwargs['service'].get()] = details
            else:
                data = {}
                data[kwargs['service'].get()] = details

            # Writing back the data
            with open(".data", "w") as outfile:
                outfile.write(json.dumps(data, sort_keys=True, indent=4))

            # To delete contents of the Entry
            for widg in ('username', 'service', 'password'):
                kwargs[widg].delete(0, 'end')

            kwargs['info'].config(text="Added!!")

        # end of if
        else:

            kwargs['info'].config(text="Service or Password can't be empty!!")


# used for debugging
if __name__ == '__main__':
    root = Tk()
    Tk.iconbitmap(root, default='icon.ico')
    Tk.wm_title(root, "Test")
    Label(root, text="Root window").pack()
    new = AddWindow()
    root.mainloop()