pyqt4 - python matching files from one list with files from another list based on name -

i learning python , programing in general , need assistance.

i wrote python script reads 1 file, unique values, opens second file , and uses unique values makes calculation(script long upload) created gui using pyqt4 allowed user browse clicking qpushbutton , stored file path in qlineedit set file in script f1 = self.lineedit.text() , f2 = self.lineedit2.text worked however, need allow user select multiple files , match every file 1 corresponding file 2 since dependent on each other

here updates made widget functions accept multiple files:

def first_file_set(self):      dlg = qfiledialog()     files = dlg.getopenfilenames()     self.listwidget.additems(list(files))          def second_file_set(self):     dlg = qfiledialog()     filenames = dlg.getopenfilenames()     self.listwidget_2.additems(list(filenames))   def clearf(self):     item in self.listwidget2.selecteditems():         self.listwidget.clear()  def clears(self):     item in self.listwidget.selecteditems():         self.listwidget_2.clear()   def calculate(self):  #code long how reading files    l1 = []    f1 = self.listwidget.item()      open(f1,'r') csvfile:         csvreader = csv.reader(csvfile)         line in csvreader:             l1.append(list(line))          # more code      l2 = []     f2 = self.listwidget_2.item()[0]      open(f2,'r') csvfile:         csvreader = csv.reader(csvfile)         line in csvreader:             l2.append(list(line))                # more code 

i still want use code wrote on multiple files time.

eg.

open 1 file file path in listwidget, grab unique items, find file same name path in listwidget_2 use unique items perform calculations, repeat every file in list

if file 1 , 2 have same string in name how pull , match them?

example file 1 names: filemap02.csv filemap03.csv filemap04.csv

example file 2 names: newmap02.csv newmap03.csv newmap04.csv

so couldn't test since did not post working example, should it:

for item in self.listwidget.selecteditems():     #first file     fn1=str(item.text())      #get string needs match     matchstr=fn1.replace("file","")      #find matching item in second listwidget         fn2=self.listwidget2.finditems(matchstr,qtcore.qt.matchexactly)      # calculations      whateverfunc(fn1,fn2) 

hope helps.