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csv splitter
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‎12_csv_split.py‎

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### WIP
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importsys
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importos
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importgetopt
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importcsv
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"""
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Splits a CSV file into multiple pieces based on command line arguments.
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Arguments:
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`-h`: help file of usage of the script
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`-i`: input file name
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`-o`: output file, A %s-style template for the numbered output files.
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`-r`: row limit to split
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`-c`: A %s-style template for the numbered output files.
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Default settings:
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`output_path` is the current directory
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`keep_headers` is on (headers will be kept)
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`delimeter` is ,
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Example usage:
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# split by every 10000 rows
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>> python 12_csv_split.py -i input.csv -o rownumber -r 10000
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# split by unique items in column 0
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>> python 12_csv_split.py -i input.csv -o userid -c 0
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# access help
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>> python 12_csv_split.py -h for help
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"""
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defmain(argv):
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argument_dict=grab_command_line_arguments(argv)
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parse_file(argument_dict)
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defgrab_command_line_arguments(argv):
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# global variables
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inputfile=''
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outputfile=''
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rowlimit=''
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columnindex=''
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argument_dict={}
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# grab arguments
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opts, args=getopt.getopt(argv,"hi:o:r:c:",["ifile=","ofile=","rowlimit=","columnindex="])
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# end if no arguments provided
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ifnotopts:
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print"No options provided. Try again. Use `-h` for help."
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sys.exit()
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# grab arguments
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foropt, arginopts:
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ifopt=='-h':
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print'csvsplit.py -i <inputfile> -r <row limit> -c <column index> -o <outputfile>'
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sys.exit()
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elifoptin ("-i", "--ifile"):
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inputfile=arg
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elifoptin ("-o", "--ofile"):
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outputfile=arg
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elifoptin ("-r", "--rowlimit"):
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rowlimit=arg
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elifoptin ("-c", "--columnindex"):
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columnindex=arg
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# Output arguments
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print"\nArguments:"
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ifinputfile:
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argument_dict["input_file"] =inputfile
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print"Input file is '{}'".format(inputfile)
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else:
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"Please enter an input file."
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ifoutputfile:
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argument_dict["output_file"] =outputfile
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print"Output file is '{}'".format(outputfile)
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else:
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print"Please enter an output file."
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ifrowlimit:
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argument_dict["rowlimit"] =rowlimit
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print"Rowlimit is '{}'".format(rowlimit)
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ifcolumnindex:
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argument_dict["columnindex"] =columnindex
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print"Columnindex is '{}'".format(columnindex)
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ifrowlimitandcolumnindex:
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print"Please use either a rowlimit or columnlimit, not both."
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sys.exit()
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ifnotrowlimitorcolumnindex:
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print"Please enter either a rowlimit or columnlimit."
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sys.exit()
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# to do - check to make sure file, rowlimit, and columnlimit exist
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printargument_dict
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returnargument_dict
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defparse_file(argument_dict):
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#split csv file by certain rownumber
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ifargument_dict["rowlimit"]:
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rowlimit=int(argument_dict["rowlimit"])
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output_name_file="{}.csv".format(argument_dict["output_file"])
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output_path='.'
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keep_headers=True
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delimiter=','
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filehandler=open(argument_dict["input_file"],'r')
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reader=csv.reader(filehandler, delimiter=delimiter)
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current_piece=1
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current_out_path=os.path.join(
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output_path,
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output_name_file
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)
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current_out_writer=csv.writer(open(current_out_path, 'w'), delimiter=delimiter)
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current_limit=rowlimit
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ifkeep_headers:
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headers=reader.next()
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current_out_writer.writerow(headers)
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fori, rowinenumerate(reader):
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ifi+1>current_limit:
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current_piece+=1
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current_limit=rowlimit*current_piece
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current_out_path=os.path.join(
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output_path,
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output_name_file
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)
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current_out_writer=csv.writer(open(current_out_path, 'w'), delimiter=delimiter)
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# elif columnindex: #split csv file accrording to unique values of certain column,it's like filter only certain item in excel
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# itemlist = []
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# columnindex = int(columnindex)
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# output_name_template= outputfile+'_%s.csv'
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# output_path='.'
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# keep_headers=True
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# delimiter=','
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# filehandler = open(inputfile,'r')
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# reader = csv.reader(filehandler, delimiter=delimiter)
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# if keep_headers:
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# headers = reader.next()
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# for i, row in enumerate(reader):
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# current_out_path = os.path.join(
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# output_path,
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# output_name_template % row[columnindex] )
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# if row[columnindex] not in itemlist:
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# try:
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# current_out_writer = csv.writer(open(current_out_path, 'w'), delimiter=delimiter)
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# except IOError:
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# continue
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# else:
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# itemlist.append(row[columnindex])
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# if keep_headers:
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# current_out_writer.writerow(headers)
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# current_out_writer.writerow(row)
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# else:
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# current_out_writer = csv.writer(open(current_out_path, 'a'), delimiter=delimiter)
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# current_out_writer.writerow(row)
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# print 'totally %i unique items in column %i \n' % (len(itemlist),columnindex)
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# else:
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# print "oops, please check instruction of script by >>./csvsplit.py -h"
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if__name__=="__main__":
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main(sys.argv[1:])

‎12_sample_csv.csv‎

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First Name,Last Name,Email Address,Phone Number,Company,Date Hired
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Abigail,Branch,[email protected],(412) 540-6276,Sem Eget PC,07/02/2013
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Roanna,Lambert,[email protected],(747) 536-6748,Eget Laoreet Foundation,11/23/2013
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Amanda,England,[email protected],(669) 164-6411,Magna Nec Quam Limited,08/11/2012
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Hilel,Chapman,[email protected],(683) 531-0279,Sed Molestie PC,06/25/2012
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Basia,Bowers,[email protected],(135) 986-6437,Tincidunt Nunc Ac Associates,05/11/2013
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Dylan,Dunlap,[email protected],(877) 604-4603,Eu Ultrices Institute,07/02/2012
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Regan,Cardenas,[email protected],(693) 378-7235,Neque Morbi Corporation,10/30/2012
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Sade,Green,[email protected],(816) 255-5508,Eleifend Ltd,09/03/2012
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Marshall,Richardson,[email protected],(460) 132-4621,Purus Maecenas Libero LLC,12/21/2012
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Regina,Brown,[email protected],(185) 963-9365,Vulputate Consulting,06/16/2013
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Irma,Rivers,[email protected],(701) 393-3679,Nec Leo Morbi Incorporated,05/07/2013
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Rudyard,Cline,[email protected],(971) 228-3147,Risus Quis Consulting,04/25/2013
14+
Justina,Richmond,[email protected],(755) 103-3125,Ullamcorper Associates,02/12/2013
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Reece,Blackburn,[email protected],(239) 528-2742,Suspendisse Associates,04/03/2014
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Lillith,Holden,[email protected],(305) 797-1579,Dapibus Id Blandit LLP,09/11/2013
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Taylor,Vinson,[email protected],(355) 993-1099,Egestas Institute,05/16/2012
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Colton,Barker,[email protected],(705) 978-5992,Ornare Consulting,04/24/2013
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Vladimir,Walls,[email protected],(311) 406-4856,Faucibus Ut Nulla LLP,08/12/2012
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Freya,Rowland,[email protected],(284) 850-7506,Turpis PC,05/31/2013
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Cullen,Phelps,[email protected],(425) 280-1763,Rhoncus Id Mollis Consulting,09/10/2013
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Boris,Lopez,[email protected],(769) 701-0055,Nunc Sed Orci Industries,07/26/2013
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Alvin,Meyer,[email protected],(783) 312-0821,Dignissim Pharetra Ltd,03/02/2013
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Nicole,Boyle,[email protected],(675) 678-1160,Dictum Eleifend Nunc LLC,05/05/2012
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Flynn,Petersen,[email protected],(787) 543-7411,Penatibus Et Associates,03/11/2013
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Troy,Herman,[email protected],(932) 900-7922,Dolor Donec Associates,11/16/2012
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Constance,Shields,[email protected],(221) 761-2368,Vel Quam Company,02/14/2014
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Ocean,Green,[email protected],(481) 832-0298,Nunc Associates,03/03/2013
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Steven,Lopez,[email protected],(294) 415-0435,Ipsum Company,07/25/2013
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Adara,Lee,[email protected],(760) 291-7826,Eu Ultrices PC,10/05/2013
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Noble,Hancock,[email protected],(333) 272-8234,Vitae Risus Duis LLC,09/13/2012
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Kendall,Wilcox,[email protected],(173) 982-4381,Ultrices Industries,01/26/2013
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Sebastian,Barton,[email protected],(951) 817-9217,In Mi Pede Corporation,05/11/2014
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Gavin,Clark,[email protected],(671) 714-8378,Vestibulum Neque Limited,06/06/2012
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Charles,Woods,[email protected],(559) 935-9739,Amet Ante Company,09/02/2013
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Elvis,Roberts,[email protected],(184) 182-5324,Facilisis Vitae Inc.,01/07/2014
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Caldwell,Carey,[email protected],(125) 243-9354,Egestas Lacinia Sed Inc.,10/24/2012
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Jesse,Leblanc,[email protected],(726) 216-8000,Lectus Ltd,11/22/2013
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Hu,Adkins,[email protected],(370) 317-7556,Aliquam Vulputate Company,10/19/2013
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Hamilton,Tyler,[email protected],(234) 744-3868,Nunc Sed LLC,10/19/2012
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Cade,Osborn,[email protected],(501) 753-9793,Consectetuer Industries,08/14/2013
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Ashely,Kent,[email protected],(789) 869-6558,Imperdiet Ornare Corporation,02/04/2013
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Veda,Cameron,[email protected],(522) 127-0654,Egestas Incorporated,12/29/2012
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Burke,Ferrell,[email protected],(975) 891-3694,Purus Accumsan Institute,07/26/2013
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Fuller,Lamb,[email protected],(523) 614-5785,Pede Cum Sociis Limited,12/02/2013
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Natalie,Taylor,[email protected],(117) 594-2685,A Facilisis Non LLP,12/06/2013
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Astra,Morton,[email protected],(390) 867-2558,Non Ante Bibendum Foundation,05/07/2012
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David,Espinoza,[email protected],(287) 945-5239,Lobortis Nisi Nibh Industries,05/11/2014
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Sybil,Todd,[email protected],(611) 848-4765,Massa Mauris Vestibulum Incorporated,01/19/2013
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Lee,Barron,[email protected],(765) 654-9167,In Ornare Inc.,01/01/2013
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Zachery,Reed,[email protected],(667) 465-1222,Ac Corp.,10/07/2012
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Marshall,Brady,[email protected],(391) 336-5310,Ac Sem Ut Incorporated,07/12/2012
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Selma,Floyd,[email protected],(398) 920-1076,Non Foundation,07/21/2012
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Ivy,Garrison,[email protected],(428) 321-5542,Semper Erat Foundation,12/19/2013
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Wyatt,Gibbs,[email protected],(973) 141-9840,Pellentesque Corp.,11/21/2013
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Vaughan,Moss,[email protected],(597) 730-0228,Tempor Institute,10/27/2013
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Elijah,Mcgowan,[email protected],(127) 171-1859,Tempor Bibendum Donec LLC,08/26/2012
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Miranda,Ingram,[email protected],(864) 873-7359,Feugiat Non Lobortis Institute,08/20/2012
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Anastasia,Lawrence,[email protected],(106) 260-8688,Sit Amet Consulting,05/31/2012
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Samson,Patton,[email protected],(302) 330-4251,Hendrerit Associates,12/27/2013
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Erasmus,Sexton,[email protected],(972) 793-9187,Feugiat Industries,10/15/2013
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Emery,Gardner,[email protected],(848) 534-1656,Nunc Sit Amet Industries,08/24/2012
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Nomlanga,Hensley,[email protected],(644) 169-6243,Consectetuer Company,08/29/2012
64+
Jason,Craft,[email protected],(691) 770-9143,Blandit LLC,03/23/2013
65+
Kathleen,Haley,[email protected],(891) 454-8400,Lorem Company,07/02/2012
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Aline,Flynn,[email protected],(563) 400-6803,Et Netus LLP,01/28/2013
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Ursa,Dickson,[email protected],(371) 615-7750,Nullam Company,12/22/2012
68+
Wesley,Lopez,[email protected],(287) 777-3724,Lobortis Ultrices Vivamus Corp.,06/17/2013
69+
Victoria,Mcleod,[email protected],(583) 108-1294,Justo Faucibus Lectus Corporation,10/17/2012
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Shana,Roach,[email protected],(921) 385-2342,Quis Turpis Vitae Incorporated,05/26/2014
71+
Maxine,Ruiz,[email protected],(520) 801-0808,Luctus Foundation,12/05/2013
72+
Harriet,Bishop,[email protected],(758) 716-9401,Dictum Phasellus In Inc.,09/08/2013
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Serina,Williams,[email protected],(270) 288-0136,At Egestas A Corporation,03/17/2014
74+
Rhea,Copeland,[email protected],(775) 493-9118,Ipsum Incorporated,05/22/2013
75+
Evan,Holcomb,[email protected],(695) 656-8621,Sem Institute,02/16/2013
76+
Basil,Mccall,[email protected],(144) 989-4125,Feugiat Tellus Lorem Institute,02/25/2013
77+
Florence,Riley,[email protected],(663) 529-4829,Enim Sit PC,01/14/2014
78+
Heather,Peck,[email protected],(850) 444-0917,Curabitur Limited,01/16/2014
79+
Dara,Robinson,[email protected],(106) 576-1355,Urna Incorporated,12/15/2012
80+
Kylan,Maxwell,[email protected],(973) 206-2558,Aliquam Eros Turpis Company,08/21/2012
81+
Petra,Blake,[email protected],(901) 207-9872,Ac Metus Institute,06/17/2013
82+
Fiona,Goff,[email protected],(265) 255-7749,Odio Phasellus Corp.,12/03/2012
83+
Kameko,Diaz,[email protected],(731) 354-4848,Montes Nascetur Corporation,08/16/2013
84+
Craig,Valentine,[email protected],(437) 229-8198,Etiam Gravida Molestie Consulting,05/06/2014
85+
Samson,Cunningham,[email protected],(335) 666-7758,Nec Ante Associates,07/02/2013
86+
Yoko,Rogers,[email protected],(893) 405-6889,Fermentum Vel Mauris Corp.,03/29/2014
87+
Walter,Burnett,[email protected],(336) 411-9222,Suscipit Est Institute,06/26/2012
88+
Gisela,Nash,[email protected],(917) 249-0166,Non Magna LLP,11/23/2012
89+
Wanda,Pierce,[email protected],(480) 872-3389,Cum Sociis Natoque Limited,11/02/2013
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Jane,Dixon,[email protected],(112) 139-8563,Id Ante Dictum LLC,03/14/2014
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Octavius,Shannon,[email protected],(541) 652-3295,Libero Est Institute,05/28/2014
92+
Rigel,Hunt,[email protected],(792) 358-7505,Enim PC,09/05/2013
93+
Rachel,Gray,[email protected],(165) 973-1366,Suscipit Nonummy Fusce LLC,05/08/2013
94+
Madeline,Bradley,[email protected],(436) 223-3135,Posuere PC,01/24/2014
95+
Emma,Conner,[email protected],(304) 429-2622,Nulla Incorporated,11/05/2013
96+
Halee,Mclean,[email protected],(669) 364-0148,Ligula Consulting,03/05/2014
97+
Conan,Williams,[email protected],(999) 649-4433,Velit Eu Limited,05/15/2014
98+
Martena,Fowler,[email protected],(405) 661-1762,Blandit Nam Institute,02/27/2013
99+
Robin,Buckley,[email protected],(376) 771-9862,Sed Corp.,10/30/2012
100+
Isadora,Adams,[email protected],(138) 774-6058,Blandit Viverra Donec Institute,08/07/2012
101+
Bernard,Price,[email protected],(368) 882-6146,Egestas Blandit LLP,11/03/2013

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