start porting jobsub to python3

jobsub/jobsub.py

-#!/usr/bin/env python2
+#!/usr/bin/env python3
 """
 jobsub: a tool for Corryvreckan job submission
 
@@ -99,10 +99,10 @@ def loadparamsfromcsv(csvfilename, runs):
             self.f.seek(0)
             self.linecount = 0
         def next(self):
-            line = self.f.next()
+            line = next(self.f)
             self.linecount += 1
-            while line.startswith(self.commentstring) or not line.strip(): # test if line commented or empty
-                line = self.f.next()
+            while line.startswith(bytes(self.commentstring, encoding='utf-8')) or not line.strip(): # test if line commented or empty
+                line = next(self.f)
                 self.linecount += 1
             return line
         def __iter__(self):
@@ -119,20 +119,25 @@ def loadparamsfromcsv(csvfilename, runs):
         log.debug("Opening csv file '"+csvfilename+"'.")
         csvfile = open(csvfilename, 'rb')
         filteredfile = CommentedFile(csvfile)
+
         try:
             # construct a sample for the csv format sniffer:
             sample = ""
             try:
                 while (len(sample)<1024):
-                    sample += filteredfile.next()
+                    sample += str(next(filteredfile))
             except StopIteration:
                 log.debug("End of csv file reached, sample limited to " + str(len(sample))+ " bytes")
             dialect = csv.Sniffer().sniff(sample) # test csv file format details
             dialect.escapechar = "\\"
             log.debug("Determined the CSV dialect as follows: delimiter=%s, doublequote=%s, escapechar=%s, lineterminator=%s, quotechar=%s , quoting=%s, skipinitialspace=%s", dialect.delimiter, dialect.doublequote, dialect.escapechar, list(ord(c) for c in dialect.lineterminator), dialect.quotechar, dialect.quoting, dialect.skipinitialspace)
             filteredfile.rewind() # back to beginning of file
-            reader = csv.DictReader(filteredfile, dialect=dialect) # now process CSV file contents here and load them into memory
-            reader.next() # python < 2.6 requires an actual read access before filling 'DictReader.fieldnames'
+            reader = csv.DictReader(csvfile, dialect=dialect) # now process CSV file contents here and load them into memory
+            #next(reader) # python < 2.6 requires an actual read access before filling 'DictReader.fieldnames'
+
+            for row in reader:
+                print(row)
+
             log.debug("CSV file contains the header info: %s", reader.fieldnames)
             try:
                 reader.fieldnames = [field.lower() for field in reader.fieldnames] # convert to lower case keys to avoid confusion
@@ -172,8 +177,8 @@ def loadparamsfromcsv(csvfilename, runs):
                 log.error("Could not find an entry for the following run numbers in '"+csvfilename+"': "+', '.join(map(str, missingRuns)))
         finally:
             csvfile.close()
-    except csv.Error, e:
-        log.error("Problem loading the csv file '"+csvfilename+"'(%s): %s"%(e.errno, e.strerror))
+    except csv.Error as e:
+        log.error("Problem loading the csv file '"+csvfilename+"': %s"%e)
         exit(1)
     return parameters_csv
 
@@ -206,7 +211,7 @@ def runCorryvreckan(filenamebase, jobtask, silent):
         log.debug("Found Corryvreckan executable: " + cmd)
     else:
         log.error("Corryvreckan executable not found in PATH!")
-	log.error(os.getcwd())
+        log.error(os.getcwd())
         exit(1)
 
     # search for stdbuf command: adjust stdout buffering
@@ -312,7 +317,7 @@ def runCorryvreckan(filenamebase, jobtask, silent):
         finally:
             log_file.close()
         rcode = p.returncode # get the return code
-    except OSError, e:
+    except OSError as e:
         log.critical("Problem with Corryvreckan execution: Command '%s' resulted in error #%s, %s", cmd, e.errno, e.strerror)
         exit(1)
     return rcode
@@ -355,7 +360,7 @@ def submitCondor(filenamebase, subfile, runnr):
         log.info ("Now submitting Corryvreckan job: "+filenamebase+".conf to HTCondor")
         log.debug ("Executing: "+cmd)
         os.popen(cmd)
-    except OSError, e:
+    except OSError as e:
         log.critical("Problem with HTCondor submission: Command '%s' resulted in error #%s, %s", cmd, e.errno, e.strerror)
         exit(1)
     return 0
@@ -406,7 +411,7 @@ def main(argv=None):
     log.error=callcounted(log.error)
 
     import os.path
-    import ConfigParser
+    import configparser
     try:
         import argparse
     except ImportError: