import sys
import os

def get_input_parameters() :
    nargs = len(sys.argv)
    print 'sys.argv[0]: ', sys.argv[0]
    print 'nargs: ', nargs
    # Then do something with arguments...

from optparse import OptionParser

def input_option_parser() :

    def_fname = 'spec-xppi0412-r0060-20120507-125420.198726277.txt'
    def_cols = 100

    parser = OptionParser(description='Process optional input parameters.', usage = "usage: %prog [options]")
    parser.add_option('-f', '--fname', dest='fname', default=def_fname, action='store', type='string', help='input file name')
    parser.add_option('-c', '--cols', dest='cols', default=def_cols, action='store', type='int', help='number of columns in the image array')
    parser.add_option('-v', dest='verbose', action='store_true',  help='set flag to print more details',  default=True)
    parser.add_option('-q', dest='verbose', action='store_false', help='set flag to print less details')
    (opts, args) = parser.parse_args()

    print 'opts:',opts
    print 'args:',args

    return (opts, args)

def getListOfFilesInDir(dirname) :
    return os.listdir(dirname)

def printListOfFilesInDir(dirname) :
    print 'List of files in the dir.', dirname
    for name in os.listdir(dirname) :
        print name
    print '\n'

        root, ext = os.path.splitext(path) # i.e. path='root-part.tail-part'
        basename  = os.path.basename(path)
        dirname   = os.path.dirname(path)
        lexist    = os.path.lexists(path)
        isfile    = os.path.isfile(path)
        isdir     = os.path.isdir(path)
        head, tail= os.path.split(path)    # i.e. path='head-part/tail-part'
...

        path_name = os.path.join(path,fname)

 my_string.replace("abcde","cde")

Sometime it looks like the window does not want to move in specified position...
In particular I have observed, that everything is going correct untill the w.show(). then, suddenly happens moveEvent(), which changes the self.pos(). In my case it happened because at construction of the combined window, its size was changed and it was moved in origin... Reservation of larger window size solved this problem.

    def closeEvent(self, event):
        try: # try to delete self object in the cp.confpars
            del cp.confpars.guiconfigparameters 
        except # AttributeError:
            pass # silently ignore

 widg.raise_()

 self.box_txt = QtGui.QTextEdit()
 self.box_txt.setText('some text')
 self.box_txt.append('a lot of additional text, exceeding the window size')
 self.box_txt.ensureCursorVisible()

  self.box_txt.moveCursor(QtGui.QTextCursor.End)
  self.box_txt.repaint()

    self.table = QtGui.QTableWidget(rows, cols, self)
    ...
    self.table.setFixedWidth(self.table.horizontalHeader().length() + 4)
    self.table.setFixedHeight(self.table.verticalHeader().length() + 29)

class GUIImage ( QtGui.QLabel ) :
    def __init__ (self, parent=None, app=None) :

        QtGui.QLabel.__init__(self, parent)

        self.setGeometry(200, 100, 100, 100)
        self.setWindowTitle('Image For Grabber')

        self.setFrame()
        ...

    def setPixmapForImage(self):
        if self.r_pixmap == None :
            self.s_pixmap = None
            self.clear()
        else :
            self.s_pixmap = self.r_pixmap.scaled(self.size(), QtCore.Qt.KeepAspectRatio)
            self.setPixmap(self.s_pixmap)
            self.setAlignment(QtCore.Qt.AlignTop | QtCore.Qt.AlignLeft)
            self.setScailedMask()

    def grabImage(self):
        fname = tempfile.NamedTemporaryFile(mode='r+b',suffix='.ppm')
        if( 0 == os.system('import -trim -frame -border %s' % (fname.name))) :
            self.r_pixmap = QtGui.QPixmap(QtGui.QImage(fname.name)) 
            self.setPixmapForImage()

    def grabEntireWindow(self):
        self.r_pixmap = QtGui.QPixmap.grabWindow(QtGui.QApplication.desktop().winId())
        self.setPixmapForImage()

   def loadImageFromFile(self, fname) : 
        #Read formats: bmp, jpg, jpeg, png, ppm, xbm, xpm + gif, pbm, pgm, 
        self.r_pixmap = QtGui.QPixmap(QtGui.QImage(fname))     
        self.setPixmapForImage()

    def setScailedMask(self):
        size = self.s_pixmap.size()
        print 'Scaled pixmap size: %d x %d' % (size.width(), size.height())
        #==================================
        self.qimage_mask = QtGui.QImage(size, QtGui.QImage.Format_Mono)
        self.qimage_mask.fill(0)
        self.qbitmap_mask = QtGui.QBitmap.fromImage(self.qimage_mask)
        self.s_pixmap.setMask(self.qbitmap_mask)
        #==================================

    def saveImageInFile(self, fname='test.png'): 
        #Write formats: bmp, jpg, jpeg, png, pbm, pgm, ppm, xbm, xpm
        if self.r_pixmap is not None :
            self.r_pixmap.save(fname, format=None)

    def setFrame(self):
        self.frame = QtGui.QFrame(self)
        self.frame.setFrameStyle( QtGui.QFrame.Box | QtGui.QFrame.Sunken ) #Box, Panel | Sunken, Raised 
        self.frame.setLineWidth(0)
        self.frame.setMidLineWidth(1)
        self.frame.setGeometry(self.rect())
        #self.frame.setVisible(False)
        self.frame.setStyleSheet('background: transparent;') 

    def resizeEvent(self, e):
        s = self.size()
        self.frame.setGeometry(QtCore.QRect(0,0,s.width(),s.height()))
        self.setPixmapForImage()

...
        self.poi1  = QtCore.QPoint(0,0)
        self.poi2  = QtCore.QPoint(0,0)
        self.rect1 = QtCore.QRect()
        self.rect2 = QtCore.QRect()

        self.pen1 = QtGui.QPen(QtCore.Qt.black) 
        self.pen2 = QtGui.QPen(QtCore.Qt.white) 
        self.pen1.setStyle(QtCore.Qt.DashLine) 
        self.pen2.setStyle(QtCore.Qt.DashLine) 
        self.pen1.setWidthF(1) 
        self.pen2.setWidthF(1)
...

     def paintEvent(self, e):
        super(GUIImage,self).paintEvent(e)
        qp = QtGui.QPainter()
        # or QPainter can be defined earlier and use it as   qp = self.qp
        qp.begin(self)
        #self.drawPixmap(qp)
        self.drawRect(qp)
        qp.end()
        self.update()

    def setPen(self, qp):
        self.pen.setStyle(QtCore.Qt.DashLine) 
        self.pen.setWidthF(1) 

    def drawRect(self, qp):
        if self.r_pixmap == None:
            return

        p1x, p1y = self.poi1.x(), self.poi1.y()
        p2x, p2y = self.poi2.x(), self.poi2.y()

        R=1
        if abs(p2x-p1x) < R : return
        if abs(p2y-p1y) < R : return

        self.rect1.setCoords( p1x,   p1y,   p2x,   p2y)
        self.rect2.setCoords( p1x+1, p1y+1, p2x-1, p2y-1)
        qp.setPen  (self.pen1)
        qp.drawRect(self.rect1);
        qp.setPen  (self.pen2)
        qp.drawRect(self.rect2);


    def drawPixmap(self, qp):
        if self.r_pixmap != None:
            qp.drawPixmap(0,0,self.s_pixmap)

    self.styleTransp = "background-color: rgb(255,   0,   0, 100);"
    self.styleTitle  = "background-color: rgb(239, 235, 231, 255); color: rgb(100, 160, 100);" # Gray bkgd
    self.styleWhite  = "background-color: rgb(255, 255, 255); color: rgb(0, 0, 0);" 
    self.styleTitleBold = self.styleTitle + 'font-size: 18pt; font-family: Courier; font-weight: bold;'
    self.styleWhiteFixed= self.styleWhite + 'font-family: Fixed;'

    self.colorEditInfo = QtGui.QColor(100, 255, 200)
    self.colorEditBad  = QtGui.QColor(255,   0,   0)
    self.colorEdit     = QtGui.QColor('white') 

    self.but_close .setStyleSheet (cp.styleButton)
    self.but_close .setFlat(True)
    self.but_logger.setVisible(True) 
    self.box_txt   .setReadOnly(True)
    self.tit_title .setAlignment(QtCore.Qt.AlignTop | QtCore.Qt.AlignCenter)
    self.but_logger.setIcon(cp.icon_contents)

    self.setMinimumWidth(400)
    self.setMinimumHeight(320)
    self.setMinimumSize(600,700)
    self.setFixedHeight(350)

     path = './icons/'
     self.icon_contents = QtGui.QIcon(path + 'contents.png')
     self.but_logger.setIcon(cp.icon_contents)

        self.edi_usr.setToolTip('Sender of the message')

fig = plt.figure(num=1, figsize=(10,10), dpi=100, facecolor='w',edgecolor='w',frameon=True)
axes = fig.add_subplot(111)
axim = axes.imshow(arrwin, interpolation='nearest', origin='bottom', aspect='auto', extent=[xmin, xmax, ymax, ymin])

fig.savefig(fname, dpi=240)

fig.clear()

axes.plot(xarr1, yarr1, '-r', xarr2, yarr2,  '-g')

axes.hist(arr, bins=100, range=(10,50), log=False) # log for vertical scale only

img = axes.imshow(arr2d, interpolation='nearest', origin='bottom', aspect='auto')
img.set_clim(Amin,Amax)

cbar = self.fig.colorbar(img, orientation='vertical', \
                         fraction=0.1, pad=0.01, shrink=1.0, aspect=20)

        # fraction - of the 2d plot occupied by the color bar
        # pad      - is a space between 2d image and color bar
        # shrink   - factor for the length of the color bar
        # aspect   - ratio length/width of the color bar

axcb = fig.add_axes([0.1,  0.1, 0.8, 0.1]) # x0, y0, width, height
cbar = fig.colorbar(img, cax=axcb, orientation='horizontal', \
                    fraction=0.1, pad=0.01, shrink=1.0, aspect=20)
axcb.xaxis.set_ticks_position('top') # change position of axis labels

axes  = fig.add_subplot(111)        

axes1  = fig.add_subplot(211)        
axes2  = fig.add_subplot(212)        

                    # x0, y0, width, height
axgr = fig.add_axes([0.1,  0.64, 0.80, 0.35])
axhi = fig.add_axes([0.1,  0.14, 0.35, 0.35])
axti = fig.add_axes([0.55, 0.14, 0.35, 0.35])

import matplotlib.gridspec as gridspec
gs   = gridspec.GridSpec(20, 20)
# Naive direction        [  Y   ,   X ]
axsa = fig.add_subplot(gs[ 1:16,  0:14])
axsb = fig.add_subplot(gs[ 1:16, 14:19])
axsc = fig.add_subplot(gs[16:  ,  0:14])

    
axes.set_xlim((-50,50))
axes.set_ylim((-10,210))

import matplotlib.lines  as lines
line = lines.Line2D(arrx, arry, linewidth=1, color='r')   
axes.add_artist(line)

from matplotlib.ticker import MaxNLocator
axes.xaxis.set_major_locator(MaxNLocator(4))

import matplotlib.ticker as mtick
axes.xaxis.set_major_formatter( mtick.NullFormatter() )

for label in axes.get_xticklabels() :
    label.set_rotation(60)                  # rotate by 60 degree
    label.set_horizontalalignment('center') # 'right', etc.

axes.xaxis.set_ticks_position('top')
axes.yaxis.set_ticks_position('right')

axes.tick_params(axis='both', which='major', labelsize=8)

axes.set_xlabel('Time index', fontsize=10)
axes.set_ylabel('dt(sec)', fontsize=8)

axes.set_xlabel(r'$\rho A_i$')

plt.text(x, y, text, fontsize=7, color='k', ha='left', rotation=45)
axes.text(x, y, text, fontsize=7, color='k', ha='left', rotation=45)

    fig  = plt.figure(figsize=(15,5), dpi=80, facecolor='w',edgecolor='w',frameon=True)
    fig.canvas.set_window_title('Image And Spectrum ' + u'\u03C6')

    
plt.title('Image',color='b',fontsize=20)
or
axes.set_title('Image',color='b',fontsize=20)

    
from math import log10
log_vmin, log_vmax = log10(vmin), log10(vmax)

logbins=10**np.linspace(log_vmin, log_vmax, nbins)
# or:
logbins=np.logspace(log_vmin, log_vmax, nbins)
self.axhi.hist(self.arrwin.flatten(), bins=logbins )  

    
    fig.canvas.set_window_title('Image And Spectrum ' + u'\u03C6')

    
    str = 'Symbol phi: ' + u'\u03C6'

canvas = fig.canvas
canvas.mpl_connect('button_press_event',   self.processMouseButtonPress) 
canvas.mpl_connect('button_release_event', self.processMouseButtonRelease) 
canvas.mpl_connect('motion_notify_event',  self.processMouseMotion)

...

    def processMouseButtonPress(self, event) :
        print 'MouseButtonPress'
        print 'event: xdata, ydata, x, y =', event.xdata, event.ydata, event.x, event.y

        if event.inaxes == self.axgr : self.mousePressOnGraph(event)
        if event.inaxes == self.axti : self.mousePressOnGraph(event)
        if event.inaxes == self.axhi : self.mousePressOnHisto(event)

        if event.button == 1 : # 1=left, 2=middle, 3=right
            self.gr_xmin = float(event.xdata)

import matplotlib
matplotlib.use('Qt4Agg')
import matplotlib.pyplot as plt

import matplotlib
if matplotlib.get_backend() != 'Qt4Agg' : 
    matplotlib.use('Qt4Agg')

pos = fig.canvas.manager.window.pos()
print 'x,y=', pos.x(), pos.y()

fig.canvas.manager.window.move(x,y) # in pixels from top-left corner

plt.get_current_fig_manager().window.geometry("+100+300")

fig.canvas.manager.window.activateWindow() # Makes window active
fig.canvas.manager.window.raise_()         # Moves window on top

fig = plt.figure(num=None figsize=(5,10), dpi=100, facecolor='w',edgecolor='w',frameon=True)
vbox = QtGui.QVBoxLayout()
vbox.addWidget(fig.canvas)    # Wraps figure canvas in widget 
self.setLayout(vbox)

        fig.canvas.mpl_connect('button_press_event', self.onButtonPressEvent) 

#Should be implemented something like:
    def onButtonPressEvent( self, event ):
        """Figure is picked"""
        print 'click on fig number =', event.canvas.figure.number

        fig.canvas.mpl_connect('close_event', self.onCloseEvent)

#Should be implemented something like:
    def onCloseEvent( self, event ):
        print 'close event, fig number =', event.canvas.figure.number

plt.close( num ) # close figure with known number num
...
plt.close('all') # close all figures

from PyQt4 import QtGui, QtCore
class Drag ( QtCore.QObject ):
    def __init__(self) :
        QtCore.QObject.__init__(self, None) # need it for signal exchange...
    ...

        self.emit( QtCore.SIGNAL('new_xy_center(int,int)'), x, y)

from PyQt4 import QtGui, QtCore 
class BatchJobCorAna( QtCore.QObject ) : 
    def __init__(self) :
        QtCore.QObject.__init__(self, None) # need it for signal exchange...
    ...

    def connectToThread1(self):
        #try : self.connect( thread1, QtCore.SIGNAL('update(QString)'), self.updateStatus )
        try : self.connect( thread1, QtCore.SIGNAL('new_xy_center(int,int)'), self.updateStatus )
        except : logger.warning('connectToThread1 IS FAILED !!!', __name__)

    def updateStatus(self, x, y):
        print 'BatchJobCorAna: Signal is recieved, x,y=', x, y