A simple PtQt app

simple_gui1.py

import sys
from PyQt4 import QtGui, QtCore


class SimpleGui(QtGui.QWidget):
    """
    A simple PyQT gui example
    """

    def __init__(self):

        # create GUI
        QtGui.QMainWindow.__init__(self)
        self.setWindowTitle('SimpleGui ')
        # Set the window dimensions
        self.resize(400,100)

        # vertical layout for widgets
        self.grid = QtGui.QGridLayout()
        self.setLayout(self.grid)

        # Create a push button labelled 'choose' and add it to our layout
        self.btn_b1 = QtGui.QPushButton('Button1', self)
        self.grid.addWidget(self.btn_b1,1,1)

        self.btn_b2 = QtGui.QPushButton('Button2', self)
        self.grid.addWidget(self.btn_b2,1,2)

        self.btn_b3 = QtGui.QPushButton('Button3', self)
        self.grid.addWidget(self.btn_b3,1,3)

        self.chk_t2h = QtGui.QCheckBox('CheckBox1')
        self.grid.addWidget(self.chk_t2h,2,1)
        self.chk_t2h.setChecked(True)

        self.chk_verify = QtGui.QCheckBox('Verify')
        self.grid.addWidget(self.chk_verify,3,1)
        self.chk_verify.setChecked(True)

        self.text = QtGui.QTextEdit(self)
        self.grid.addWidget(self.text,4,0,10,6)

        self.btn_b2.clicked.connect(self.b2_func)
        self.btn_b1.clicked.connect(self.b1_func)
        self.btn_b3.clicked.connect(self.b3_func)

    def get_fname(self):
        """
        Handler called when 'choose file' is clicked
        """
        # When you call getOpenFileName, a file picker dialog is created
        # and if the user selects a file, it's path is returned, and if not
        # (ie, the user cancels the operation) None is returned
        self.fname = QtGui.QFileDialog.getOpenFileName(self, 'Select file')
        if self.fname:
            self.filename.setText(self.fname)
        else:
            self.filename.setText('No file selected')

    def b2_func(self):
        print("-I- Button1")
        pass

    def b1_func(self):
        print("-I- Button2")
        pass

    def b3_func(selfself):
        print("-I- Button3")
        pass

    #def minimumSizeHint(self):
    #    return QtCore.QSize(600, 600)


if __name__ == "__main__":

    app = QtGui.QApplication(sys.argv)
    gui = SimpleGui()
    gui.show()

    app.exec_()