I want to display interface graphic by showing button

[mhd-fauzan]

I've created a button to display a graphic from viewer.py file. I want the graphic from the viewer.py file to be displayed by clicking a button from the gui that I have created. Here's the code for a gui and graphics. Both are in separate files.
GUI Code

import pandas as pd
import customtkinter
from customtkinter import filedialog
from viewer import *

customtkinter.set_appearance_mode("Light")
customtkinter.set_default_color_theme("blue")

class Myapp():
    
    def __init__(self):
        self.root = customtkinter.CTk()
        self.root.geometry('1050x600')
        self.root.title("APx Platform")
        
        self.hardware = ["APx525"]
        self.variable = tkinter.StringVar()
        self.variable.set("Choice Hardware Platform")
        
        # Calibration Frame
        self.frame_1 = customtkinter.CTkFrame(master=self.root)
        self.frame_1.grid(row=4, column=1, padx=(40, 40), pady=(40, 40), sticky="nsew")
        
        # Measurement Frame
        self.frame_2 = customtkinter.CTkFrame(master=self.root)
        self.frame_2.grid(row=4, column=2, padx=(40, 40), pady=(40, 40), sticky="nsew")
        
        # Viewer&Report Frame
        self.frame_3 = customtkinter.CTkFrame(master=self.root)
        self.frame_3.grid(row=4, column=3, padx=(40, 40), pady=(40, 40), sticky="nsew")
        
        self.calibration = customtkinter.CTkLabel(self.frame_1, text="CALIBRATION", font=("Nunito",15))
        self.calibration.grid(row=4, column=1, pady=10)
        self.measurement = customtkinter.CTkLabel(self.frame_2, text="MEASUREMENT", font=("Nunito",15))
        self.measurement.grid(row=4, column=2, pady=10)
        self.result = customtkinter.CTkLabel(self.frame_3, text="VIEWER & REPORTS", font=("Nunito",15))
        self.result.grid(row=4, column=3, pady=10)

        # CALIBRATION
        self.c1 = customtkinter.CTkButton(self.frame_1, text="KEMAR", font=("Ubuntu", 12))
        self.c1.grid(row=5, column=1, padx=(65, 65), pady=(5, 10))
        self.c2 = customtkinter.CTkButton(self.frame_1, text="Mic", font=("Ubuntu", 12))
        self.c2.grid(row=6, column=1, padx=(50, 50), pady=(5, 10))
        self.c3 = customtkinter.CTkButton(self.frame_1, text="Speaker", font=("Ubuntu", 12))
        self.c3.grid(row=7, column=1, padx=(50, 50), pady=(5, 10))
        self.c4 = customtkinter.CTkButton(self.frame_1, text="DUT Nominal", font=("Ubuntu", 12))
        self.c4.grid(row=8, column=1, padx=(50, 50), pady=(5, 10))
        self.c5 = customtkinter.CTkButton(self.frame_1, text="EQ Normalization", font=("Ubuntu", 12))
        self.c5.grid(row=9, column=1, padx=(50, 50), pady=(5, 15))

        # MEASUREMENT
        self.m1 = customtkinter.CTkButton(self.frame_2, text="Load JSON Script", font=("Ubuntu", 12), command=self.open_file)
        self.m1.grid(row=5, column=2, padx=(65, 65), pady=(5, 10))
        self.m1 = customtkinter.CTkButton(self.frame_2, text="Run JSON Script", font=("Ubuntu", 12))
        self.m1.grid(row=6, column=2, padx=(50, 50), pady=(5, 10))
        self.m1 = customtkinter.CTkButton(self.frame_2, text="Save Data", font=("Ubuntu", 12))
        self.m1.grid(row=7, column=2, padx=(50, 50), pady=(5, 10))

        # VIEWER & REPORT
        self.v1 = customtkinter.CTkButton(self.frame_3, text="Single Viewer", font=("Ubuntu", 12))
        self.v1.grid(row=5, column=3, padx=(65, 65), pady=(5, 10))
        self.v2 = customtkinter.CTkButton(self.frame_3, text="Object Viewer", font=("Ubuntu", 12))
        self.v2.grid(row=6, column=3, padx=(50, 50), pady=(5, 10))
        self.v3 = customtkinter.CTkButton(self.frame_3, text="Data Comparison", font=("Ubuntu", 12))
        self.v3.grid(row=7, column=3, padx=(50, 50), pady=(5, 10))
        self.v4 = customtkinter.CTkButton(self.frame_3, text="Data Conversion", font=("Ubuntu", 12))
        self.v4.grid(row=8, column=3, padx=(50, 50), pady=(5, 10))
        self.gen = customtkinter.CTkButton(self.frame_3, text="Report Generator", font=("Ubuntu", 12),command=lambda:self.generator())
        self.gen.grid(row=9, column=3, padx=(50, 50), pady=(5, 15)) 

app = Myapp()
app.root.mainloop()

And here is the viewer code

import pandas as pd
import matplotlib.pyplot as plt


class csv2df():
    
    def __init__(self):
        self.df = pd.read_csv("RMS level.csv", skiprows=[0,1,2])
        
    def plot(self):
        self.x = self.df["Hz"]
        self.y = self.df["dBSPL"]
        plt.plot(self.x, self.y)
        plt.xlabel("Frequency (Hz)")
        plt.ylabel("RMS Level (dBSPL)")
        
        plt.show()
        
data = csv2df()
data.plot()

I want to display the graph by clicking the "Single Viewer" button. Can you please fix it as I need this for a project.
Thank You.