Python Error self.reader.next() -


i receiving error , don't know how fix it. error show below along program. beginner programming new me. program's goal read information based of year , location , print out corresponding information psse

traceback (most recent call last): file "c:/users/roszkowskim/desktop/dictreader.py", line 75, in <module> row in reader: file "c:\python27\lib\csv.py", line 103, in next self.fieldnames file "c:\python27\lib\csv.py", line 90, in fieldnames self._fieldnames = self.reader.next() valueerror: i/o operation on closed file

_

import csv load_gen_datafile = 'c:\users\roszkowskim\desktop\data_2017.csv' open(load_gen_datafile) csvfile: reader = csv.dictreader(csvfile) mydict = {} row in reader:     year=row['year']     busnum=row['busnum']     area=row['area']     power=row['power']     tla=row['tla']     location=row['location']     yearlink=row['yearlink']     from=row['from']     to=row['to']     max=row['max']     min=row['min']  year = raw_input("please select year of study: ") print("\n")  commands = ["millwood-buchanan", "astoria-east-corona", "bronx", "dunwoodie-north-sherman_creek",         "vernon", "greenwood-statenisland","west_49th","east_13th","staten_island","east_river",         "east_view","dunwoodie-south","corona-jamaica","astoria-east-corona-jamaica",         "astoria-west-queensbridge-vernon","astoria-west-queensbridge"] max_columns = 50  index, commands in enumerate(commands):     stars_amount = max(max_columns - len(commands), 0)     row = "# {} {}({})".format(commands, "." * stars_amount, index + 1)     print(row)  location=raw_input(" \n list above show tla pockets id numbers assigned them ()\n\n please enter id #: ") print("\n")   if year in year , location in location:      mydict=(busnum,area,power)  print("here busses @ location year , new load total: ") print("\n")  #busnum, busname,scaled_power read excel sheet matching year , location busnum,area,power in mydict:     power= float(scaled_power)     busnum = int(busnum)     print('bus #: %d\t' % busnum ,'area station: %s\t'% area,'new load total: %d mw\t' % power)       #api changing , scaling generation of loads     #psspy.bsys(1,0,[0.0,0.0],0,[],1,[busnum],0,[],0,[])     #psspy.scal_2(1,0,1,[0,0,0,0,0],[0.0,0.0,0.0,0.0,0.0,0.0,0.0])     #psspy.scal_2(0,1,2,[0,1,0,1,0],[power,0.0,0,-.0,0.0,-.0,0])      #print("\n")

else: exit

when used with file stays open long in scope, when for row in reader: indented incorrectly file gets closed, tested below , please select year of study:

import csv load_gen_datafile = 'c:\\users\\dirty-santa\\desktop\\blah.csv' open(load_gen_datafile) csvfile:     reader = csv.dictreader(csvfile)     mydict = {}     row in reader:         year=row['year']         busnum=row['busnum']         area=row['area']         power=row['power']         tla=row['tla']         location=row['location']         yearlink=row['yearlink']         from=row['from']         to=row['to']         max=row['max']         min=row['min']  year = raw_input("please select year of study: ") print("\n")  commands = ["millwood-buchanan", "astoria-east-corona", "bronx", "dunwoodie-north-sherman_creek",         "vernon", "greenwood-statenisland","west_49th","east_13th","staten_island","east_river",         "east_view","dunwoodie-south","corona-jamaica","astoria-east-corona-jamaica",         "astoria-west-queensbridge-vernon","astoria-west-queensbridge"] max_columns = 50  index, commands in enumerate(commands):     stars_amount = max(max_columns - len(commands), 0)     row = "# {} {}({})".format(commands, "." * stars_amount, index + 1)     print(row)  location=raw_input(" \n list above show tla pockets id numbers assigned them ()\n\n please enter id #: ") print("\n")   if year in year , location in location:    mydict=(busnum,area,power)  print("here busses @ location year , new load total: ") print("\n")  #busnum, busname,scaled_power read excel sheet matching year , location busnum,area,power in mydict:     power= float(scaled_power)     busnum = int(busnum)     print('bus #: %d\t' % busnum ,'area station: %s\t'% area,'new load total: %d mw\t' % power)       #api changing , scaling generation of loads     #psspy.bsys(1,0,[0.0,0.0],0,[],1,[busnum],0,[],0,[])     #psspy.scal_2(1,0,1,[0,0,0,0,0],[0.0,0.0,0.0,0.0,0.0,0.0,0.0])     #psspy.scal_2(0,1,2,[0,1,0,1,0],[power,0.0,0,-.0,0.0,-.0,0])      #print("\n")

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