Untitled

import os
from PyQt5.QtWidgets import (
   QApplication, QWidget,
   QFileDialog, # Диалог открытия файлов (и папок)
   QLabel, QPushButton, QListWidget,
   QHBoxLayout, QVBoxLayout
)


app = QApplication([])
win = QWidget()       
win.resize(700, 500) 
win.setWindowTitle('Easy Editor')
lb_image = QLabel("Картинка")
btn_dir = QPushButton("Папка")
lw_files = QListWidget()


btn_left = QPushButton("Лево")
btn_right = QPushButton("Право")
btn_flip = QPushButton("Зеркало")
btn_sharp = QPushButton("Резкость")
btn_bw = QPushButton("Ч/Б")


row = QHBoxLayout()          # Основная строка
col1 = QVBoxLayout()         # делится на два столбца
col2 = QVBoxLayout()
col1.addWidget(btn_dir)      # в первом - кнопка выбора директории
col1.addWidget(lw_files)     # и список файлов
col2.addWidget(lb_image, 95) # вo втором - картинка
row_tools = QHBoxLayout()    # и строка кнопок
row_tools.addWidget(btn_left)
row_tools.addWidget(btn_right)
row_tools.addWidget(btn_flip)
row_tools.addWidget(btn_sharp)
row_tools.addWidget(btn_bw)
col2.addLayout(row_tools)


row.addLayout(col1, 20)
row.addLayout(col2, 80)
win.setLayout(row)


win.show()


workdir = ''


def filter(files, extensions):
   result = []
   for filename in files:
       for ext in extensions:
           if filename.endswith(ext):
               result.append(filename)
   return result


def chooseWorkdir():
   global workdir
   workdir = QFileDialog.getExistingDirectory()


def showFilenamesList():
   extensions = ['.jpg','.jpeg', '.png', '.gif', '.bmp']
   chooseWorkdir()
   filenames = filter(os.listdir(workdir), extensions)
   lw_files.clear()
   for filename in filenames:
       lw_files.addItem(filename)


btn_dir.clicked.connect(showFilenamesList)