Dear Mr. Kern, and Members, Thank you very much for the fast answer, my question became over-simplified.
My source code is appended below. It uses two text files (L.txt and GC.txt) as input and merges them. Please find these two files here: http://kristonvizi.hu/L.txt http://kristonvizi.hu/GC.txt Both L.txt and GC.txt contains 3000 rows. When running, the code stops with error message: 'The debugged program raised the exception IndexError "list index out of range" File: /home/kvjanos/file.py, Line: 91' And I noticed that all the lists that should contain 3000 items, contains less as follows: NIR_mean_l = 1000 items NIR_stdev_l = 1000 items R_mean_l = 1000 items R_stdev_l = 1000 items G_mean_l = 999 items G_stdev_l = 999 items area_l = 999 items NIR_mean_gc = 1000 items NIR_stdev_gc = 1000 items R_mean_gc = 1000 items R_stdev_gc = 1000 items G_mean_gc = 999 items G_stdev_gc = 999 items area_gc = 999 items This is why I thought it is a limit in list items number. Code that's failing: #******************************************* import string,sys,os,sets # Open L, GC txt files and create merged file inp_file_l = open('/home/kvjanos/L/L.txt') inp_file_gc = open('/home/kvjanos/GC/GC.txt') out_file = open('/home/kvjanos/L_GC_merged/merged.txt', 'w') # Define L lists NIR_mean_l = [] NIR_stdev_l =[] R_mean_l = [] R_stdev_l =[] G_mean_l = [] G_stdev_l =[] area_l = [] # Define GC lists NIR_mean_gc = [] NIR_stdev_gc =[] R_mean_gc = [] R_stdev_gc =[] G_mean_gc = [] G_stdev_gc =[] area_gc = [] # Processing L file line_no_l =0 # Input L file line number type_l = 1 # Input L file row type: 1 (row n),2 (row n+1) or 3 (row n+2) # Append L values to lists. for line in inp_file_l.xreadlines(): line_no_l = line_no_l + 1 if line_no_l == 1: # To skip the header row continue data_l = [] # An L row data_l = line.split() if type_l == 1: NIR_mean_l.append(data_l[2]) # Append 3rd item of the row to the list NIR_stdev_l.append(data_l[3]) # Append 4th item of the row to the list type_l = 2 # Change to row n+1 else: if type_l == 2: R_mean_l.append(data_l[2]) R_stdev_l.append(data_l[3]) type_l = 3 else: G_mean_l.append(data_l[2]) G_stdev_l.append(data_l[3]) area_l.append(data_l[1]) type_l = 1 inp_file_l.close() # Processing GC file, the same way as L file above line_no_gc =0 type_gc = 1 for line in inp_file_gc.xreadlines(): line_no_gc = line_no_gc+ 1 if line_no_gc== 1: continue data_gc = [] data_gc = line.split() if type_gc== 1: NIR_mean_gc.append(data_gc[2]) NIR_stdev_gc.append(data_gc[3]) type_gc= 2 else: if type_gc== 2: R_mean_gc.append(data_gc[2]) R_stdev_gc.append(data_gc[3]) type_gc= 3 else: G_mean_gc.append(data_gc[2]) G_stdev_gc.append(data_gc[3]) area_gc.append(data_gc[1]) type_gc= 1 inp_file_gc.close() ############################# # Create output rows from lists for i in range(len(NIR_mean_l)): # Process all input rows # Filters L rows by 'area_l' values area_l_rossz = string.atof(area_l[i]) if area_l_rossz < 10000: continue elif area_l_rossz > 100000: continue # Filters GC rows by 'area_gc' values area_gc_rossz = string.atof(area_gc[i]) if area_gc_rossz < 10000: continue elif area_gc_rossz > 200000: continue # Create output line and write out newline = [] newline.append(str(i+1)) # L newline.append(NIR_mean_l[i]) newline.append(NIR_stdev_l[i]) newline.append(R_mean_l[i]) newline.append(R_stdev_l[i]) newline.append(G_mean_l[i]) newline.append(G_stdev_l[i]) newline.append(area_l[i]) # GC newline.append(NIR_mean_gc[i]) newline.append(NIR_stdev_gc[i]) newline.append(R_mean_gc[i]) newline.append(R_stdev_gc[i]) newline.append(G_mean_gc[i]) newline.append(G_stdev_gc[i]) newline.append(area_gc[i]) outline = string.join(newline,'\t') + '\n' out_file.writelines(outline) out_file.close() #******************************************* Thnx again, Janos > Kriston-Vizi Janos wrote: > >/ Dear Members, > />/ > />/ Is there any possibility to use more than 999 items in a list? > / > Yes. Of course. > > >/ Cannot > />/ append more than 999 items. > / > Post the code that's failing for you and the error message it generates. > > And please read http://www.catb.org/~esr/faqs/smart-questions.html > <http://www.catb.org/%7Eesr/faqs/smart-questions.html> . It will > help us help you. > > >/ The same problem with 'array' type. Is it a > />/ result of a default setting maybe? > / > No. > > -- > Robert Kern > robert.kern at gmail.com <http://mail.python.org/mailman/listinfo/python-list> > > "In the fields of hell where the grass grows high > Are the graves of dreams allowed to die." > -- Richard Harter -- http://mail.python.org/mailman/listinfo/python-list
