Why my button starts the imported funtion without pressing it, i think it's the arguments but they are necessary:

def getFile(self):
        self.filename = filedialog.askopenfilename()
        if len(self.filename) > 25:
            layoutfilename = tk.Label(layoutframe, text=self.filename[25:])
            layoutfilename.grid(column=2, row=0, sticky=tk.EW, padx=5, pady=5)
        else:
            layoutfilename = tk.Label(layoutframe, text=self.filename)
            layoutfilename.grid(column=2, row=0, sticky=tk.EW, padx=5, pady=5)
        encryptbutton = tk.Button(layoutframe, text="Encrypt File", command=encryption(self.filename))
        encryptbutton.grid(column=3, row=0, padx=5, pady=5)