#создай тут фоторедактор Easy Editor!
from PyQt5.QtWidgets import(
    QApplication,QWidget,
    QLabel,QPushButton,QListWidget,
    QHBoxLayout,QVBoxLayout,QFileDialog
)
import os

app = QApplication([])
win = QWidget()
win.setWindowTitle('Редактор картинок')
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()
col1 = QVBoxLayout()
col2 = QVBoxLayout()
col1.addWidget(btn_dir)
col1.addWidget(lw_files)
col2.addWidget(lb_image,95)
row_tools = QHBoxLayout()
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 chooseWorkdir():
    global workdir
    workdir = QFileDialog.getExistingDirectory()

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

def filter(files, extensions):
    result = []
    for filename in files:
        for ext in extensions:
            if filename.endswith(ext):
                result.append(filename)
    return result
       
btn_dir.clicked.connect(showFilenameList)
app.exec()