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chapter02 done
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‎.gitignore‎

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# C extensions
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*.so
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*.bat
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*.exe
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# Distribution / packaging
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.Python

‎chapter02/LICENSE‎

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MIT License
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Copyright (c) 2020 Tran Duc Loi
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.

‎chapter02/example0201.py‎

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#!/usr/bin/env python3
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# -*- coding:utf-8 -*-
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###
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# Project Name: python4desktop - Created Date: Thursday September 17th 2020
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# Author: loitd - Email: loitranduc@gmail.com
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# Description: This is a short project/file description
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# Copyright (c) 2020 loitd. WWW: https://github.com/loitd
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# -----
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# Last Modified: Thursday September 17th 2020 9:29:07 am By: loitd
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# -----
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# HISTORY:
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# Date By Comments
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# ---------- ------ ----------------------------------------------------------
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# 2020-09-17 loitd Initialized
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###
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from tkinter import *
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def hello():
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print("Hello")
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def makeform(root, fields):
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'''Making the form based on the root'''
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for field in fields:
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# Frame = a container widget to organize other widgets.
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row = Frame(root)
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lbl = Label(row, width=16, text=field, anchor="w")
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# Entry = single-line text field.
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ent = Entry(row, width=58)
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# pack = organizes widgets in blocks before placing them in the parent widget.
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# expand = true => fill space of parent
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# fill = NONE | X (horizontally) | Y (vertically) | BOTH
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# side = TOP | BOTTOM | LEFT | RIGHT
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row.pack(side=TOP, fill=X, padx=5, pady=5)
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lbl.pack(side=LEFT)
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ent.pack(side=RIGHT, expand=YES, fill=X)
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# Insert a sample text
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ent.insert(0, "https://github.com/loitd/python4desktop")
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# Create a frame to store all buttons
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btnFrame = Frame(root)
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btnFrame.pack(side=BOTTOM, expand=YES, fill=X)
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# Create a button with foreground text color
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btn1 = Button(btnFrame, text="Do it", width=10, fg="blue", command=hello)
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btn1.pack(side=RIGHT, padx=5, pady=5)
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# Create a normal button
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btn2 = Button(btnFrame, text="Reset", command=None)
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btn2.pack(side=RIGHT, padx=5, pady=5)
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# Create a button with image and text on it
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imgexit = PhotoImage(file=r"imgexit.gif").subsample(6,7)
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btn3 = Button(btnFrame, text="Exit", image=imgexit, compound=LEFT, width=60, command=root.quit)
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btn3.image = imgexit # is a must to keep a reference
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btn3.pack(side=LEFT, padx=5, pady=5)
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if __name__ == "__main__":
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root = Tk()
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root.iconbitmap("py4de.ico")
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root.title("Python4Desktop")
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fields = ["Label 1", "Label 2", "Label 3"]
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makeform(root, fields)
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root.mainloop()

‎chapter02/example0202.py‎

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#!/usr/bin/env python3
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# -*- coding:utf-8 -*-
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###
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# Project Name: python4desktop - Created Date: Thursday September 17th 2020
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# Author: loitd - Email: loitranduc@gmail.com
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# Description: A downloader without GUI
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# Copyright (c) 2020 loitd. WWW: https://github.com/loitd
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# -----
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# Last Modified: Thursday September 17th 2020 10:14:57 pm By: loitd
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# -----
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# HISTORY:
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# Date By Comments
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# ---------- ------ ----------------------------------------------------------
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# 2020-09-17 loitd Initialized
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###
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import requests, shutil, threading, os, time
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from lutils.utils import printlog, printwait
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url = "https://file-examples-com.github.io/uploads/2017/11/file_example_MP3_1MG.mp3"
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filename = "file_example_MP3_1MG.mp3"
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lk = threading.Lock()
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def download(url, filename):
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lk.acquire()
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filename = url.split('/')[-1]
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with requests.get(url, stream=True) as r:
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filesize = r.headers['Content-length'].encode("utf8")
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printlog("Start download {0} kilobytes".format(filesize))
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with open(filename+".tmp", 'wb') as fh:
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fh.write(filesize)
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with open(filename, 'wb') as f:
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lk.release()
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shutil.copyfileobj(r.raw, f)
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return filename, filesize
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def percentage(filename):
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lk.acquire()
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with open(filename+".tmp", "rb") as fh:
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filesize = fh.read()
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filesize = int(filesize)
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printlog("Got filesize = {0}".format(filesize))
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os.remove(filename+".tmp")
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while 1:
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thesize = os.stat(filename).st_size
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if thesize == filesize:
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printlog("Download finished")
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lk.release()
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break
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else:
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printwait("{0}/{1} - Percentage: {2:.2f}%".format(thesize, filesize, (thesize * 100 / filesize)), 1)
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if __name__ == "__main__":
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dld = threading.Thread(name="Dlder", target=download, daemon=True, args=(url, filename))
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dld.start()
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percentage(filename)
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# Join the downloader thread
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dld.join()

‎chapter02/example0203.py‎

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#!/usr/bin/env python3
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# -*- coding:utf-8 -*-
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###
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# Project Name: python4desktop - Created Date: Thursday September 17th 2020
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# Author: loitd - Email: loitranduc@gmail.com
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# Description: A downloader without GUI
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# Copyright (c) 2020 loitd. WWW: https://github.com/loitd
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# -----
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# Last Modified: Thursday September 17th 2020 10:14:57 pm By: loitd
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# -----
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# HISTORY:
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# Date By Comments
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# ---------- ------ ----------------------------------------------------------
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# 2020-09-17 loitd Initialized
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###
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import os, time
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from lutils import utils
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from tkinter import Tk, messagebox, TOP, BOTTOM, RIGHT, LEFT, YES, NO, X, Y, filedialog, ttk, Frame, Label, Entry, Button, HORIZONTAL, PhotoImage
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from queue import Queue
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from functools import partial
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from requests import get, exceptions
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from shutil import copyfileobj
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from threading import Thread, Lock
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def maingui():
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root = Tk()
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root.iconbitmap("py4de.ico")
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root.title("Python4Desktop Downloader")
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# ----url
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row = Frame(root)
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row.pack(side=TOP, fill=X, padx=5, pady=5)
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lbl = Label(row, width=10, text="URL:")
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lbl.pack(side=LEFT)
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ent = Entry(row, width=88)
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ent.pack(side=RIGHT, expand=YES, fill=X)
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ent.insert(0, testurl)
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# save file name
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row = Frame(root)
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row.pack(side=TOP, fill=X, padx=5, pady=5)
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lbl2 = Label(row, width=10, text="Save as:")
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lbl2.pack(side=LEFT)
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btnSave = Button(row, text="...", command=saveFileAs)
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btnSave.pack(side=RIGHT, expand=NO)
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lblSave = Label(row, width=88, text="Please select destination file name/path")
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lblSave.pack(side=RIGHT, expand=YES, fill=X)
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btnSave['command'] = partial(saveFileAs, lblSave)
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# ProgressBar
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rowProgress = Frame(root)
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rowProgress.pack(side=TOP, fill=X, padx=5, pady=5)
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lbl = Label(rowProgress, width=10, text="PROGRESS")
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lbl.pack(side=LEFT)
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progress = ttk.Progressbar(rowProgress, orient=HORIZONTAL, length=100, mode="determinate")
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progress.pack(side=RIGHT, expand=YES, fill=X)
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# Buttons
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btnFrame = Frame(root)
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btnFrame.pack(side=BOTTOM, expand=YES, fill=X)
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# Exit
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imgexit = PhotoImage(file=r"imgexit.gif").subsample(3)
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btnExit = Button(btnFrame, text="Exit", image=imgexit, compound=LEFT, command=(lambda root=root: exit(root)))
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btnExit.image = imgexit # is a must to keep a reference
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btnExit.pack(side=LEFT, padx=5, pady=5)
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# Download
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imgdl = PhotoImage(file=r"imgdld.gif").subsample(3)
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btnDld = Button(btnFrame, text="DOWNLOAD", compound=LEFT)
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btnDld['image'] = imgdl # is a must to keep a reference
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btnDld['command'] = partial(start_download, btnDld, ent, progress, lblSave)
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btnDld.pack(side=RIGHT, padx=5, pady=5)
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# ---loops
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cmdloop(root, cmdq)
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root.mainloop()
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def saveFileAs(lblSave):
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files = [('All Files', '*.*'), ('Python Files', '*.py'), ('Text Document', '*.txt')]
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filename = filedialog.asksaveasfile(filetypes = files, defaultextension = files)
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# print(filename, filename.name)
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cmdq.put(( updateFilename, (lblSave, filename.name), {} ))
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return filename
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def cmdloop(root, cmdq):
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try:
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if not cmdq.empty():
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f,a,k = cmdq.get_nowait()
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f(*a, **k)
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except Exception as e:
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raise(e)
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# pass
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root.after(200, cmdloop, root, cmdq)
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def start_download(btnDld, ent, progress, lblSave):
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try:
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# cmdq.put((messagebox.showinfo, ('title', 'message'), {}))
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cmdq.put(( tonggle_button, (btnDld, ), {} ))
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# get some inputs
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url = ent.get()
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filename = lblSave['text']
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if url and url != "": mainq.put_nowait(url)
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utils.printlog("Queue size: {0}".format(mainq.qsize()))
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lk1 = Lock()
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# start DOWNLOAD thread
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dld = Thread(name="DOWNLOAD", target=download, daemon=True, args=(filename, lk1, btnDld))
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dld.start()
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# start STATUS thread
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stt = Thread(name="STATUS", target=status, daemon=True, args=(filename, lk1, progress))
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stt.start()
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# Additional
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# JOINING - Blocking
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# dld.join()
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# stt.join()
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# mainq.join() ## block until all tasks are done -> q.task_done()
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except Exception as e:
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raise(e)
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finally:
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pass
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def exit(root):
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EXITFLAG = 1
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root.quit()
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def download(filename, lk1, btnDld):
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lk1.acquire() #acquire the lock before status can
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try:
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if mainq.empty(): return 0
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url = mainq.get(1, 1) #block=True, timeout=None
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# filename = url.split('/')[-1]
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utils.printlog("Start download: {0}".format(url))
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with get(url, stream=True, timeout=3) as r:
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filesize = r.headers['Content-length'].encode("utf8")
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utils.printlog("Download size: {0} kilobytes".format(filesize))
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with open(filename+".tmp", 'wb') as fh:
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fh.write(filesize)
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with open(filename, 'wb') as f:
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lk1.release()
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copyfileobj(r.raw, f)
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return filename, filesize
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except exceptions.ConnectionError as e:
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utils.printlog("Error during connect to URL: {0}".format(e))
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# messagebox.showerror("Error", "Connection to {0} timeout. Please check your internet connection.".format(url))
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return 0,0
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except exceptions.MissingSchema as e:
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utils.printlog("Invalid URL: {0}".format(e))
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except Exception as e:
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raise(e)
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finally:
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utils.printlog("Finalizing with qsize: {0}".format(mainq.qsize()))
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if lk1.locked(): lk1.release()
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cmdq.put(( tonggle_button, (btnDld, ), {} )) #toggle the button
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def status(filename, lk1, progress):
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lk1.acquire()
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try:
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with open(filename+".tmp", "rb") as fh:
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filesize = fh.read()
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filesize = int(filesize)
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utils.printlog("Got filesize = {0}".format(filesize))
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os.remove(filename+".tmp")
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while 1: #Return true if the lock is acquired
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thesize = os.stat(filename).st_size
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if thesize == filesize:
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utils.printlog("Download finished")
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if lk1.locked(): lk1.release()
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cmdq.put(( setProgress, (progress, 100), {} )) #set progress
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break
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else:
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percent = (thesize * 100 / filesize)
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utils.printwait("{0}/{1} - Percentage: {2:.2f}% complete".format(thesize, filesize, percent), 1)
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cmdq.put(( setProgress, (progress, percent), {} )) #set progress
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except FileNotFoundError as e:
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utils.printlog("File not found")
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return 0
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except Exception as e:
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raise(e)
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finally:
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if lk1.locked(): lk1.release()
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def tonggle_button(btn):
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utils.printlog("Current BTN state is: {0}".format(btn['state']))
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if btn['state'] != 'disabled':
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btn['state'] = 'disabled'
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else:
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btn['state'] = 'normal'
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def setProgress(progressBar, percent):
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progressBar['value'] = percent
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def updateFilename(lbl, filename):
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lbl['text'] = filename
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if __name__ == "__main__":
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testurl = "https://file-examples-com.github.io/uploads/2017/11/file_example_MP3_5MG.mp3"
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testurl = "https://file-examples-com.github.io/uploads/2017/11/file_example_MP3_1MG.mp3"
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testurl = "https://file-examples-com.github.io/uploads/2017/11/file_example_MP3_700KB.mp3"
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filename = "file_example_MP3_1MG.mp3"
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filename = "file_example_MP3_700KB.mp3"
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EXITFLAG = 0
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cmdq = Queue()
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mainq = Queue(1)
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# Start main gui thread
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gui = Thread(name="GUI", target=maingui, daemon=True, args=())
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gui.start()
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# Join the main thread
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gui.join()

‎chapter02/file_example_MP3_1MG.mp3‎

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‎chapter02/file_example_MP3_700KB.mp3‎

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‎chapter02/imgdld.gif‎

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‎chapter02/imgexit.gif‎

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‎chapter02/imgexit.jpg‎

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