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POChanging file extensions using argparse in python
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17173084
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2013-06-18T15:37:26.783
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I want to change the file extensions of a given csv file to a xml extension or vice versa. At the command line, i can input the following <pre><code>Boo a.csv. giving a.xml Boo a.xml. giving a.csv Boo a.csv -out shoes.xml giving shoes.xml </code></pre> here is my updated code: <pre><code>import os import sys import argparse import csv import indent from xml.etree.ElementTree import ElementTree, Element, SubElement, Comment, tostring def get_args(args): parser = argparse.ArgumentParser(description = "Converts CSV to XML") parser.add_argument('-v','--verbose',action='store_true',dest='verbose',help='Increases messages being printed to stdout') parser.add_argument("inputfile", help="Please input the name of the CSV file") parser.add_argument('-o','--outputfile',help='(optional) Output file name',nargs='?') args = parser.parse_args() ext = os.path.splitext(args.inputfile)[1].lower() if args.outputfile is None: if ext == ".csv": args.outputfile = os.path.splitext(args.inputfile)[0] + '.xml' elif ext == ".xml": args.outputfile = os.path.splitext(args.inputfile)[0] + '.csv' else: sys.stderr.write('ERROR: Invalid extension %s\n' % ext) sys.exit(1) return args def main(argv): args = get_args(argv[0:]) if args is None: return 1 reader = read_csv(args.inputfile) if args.verbose: print ('Verbose Selected') if args.verbose: print ('Convert to XML with set name') generate_xml(reader, args.outputfile) return 0 def read_csv(inputfile): return list(csv.reader(inputfile)) def generate_xml(reader,outfile): root = Element('Solution') root.set('version','1.0') tree = ElementTree(root) head = SubElement(root, 'DrillHoles') description = SubElement(head,'description') current_group = None i = 0 for row in reader: if i > 0: x1,y1,z1,x2,y2,z2,cost = row if current_group is None or i != current_group.text: current_group = SubElement(description, 'hole',{'hole_id':"%s"%i}) collar = SubElement (current_group, 'collar',{'':', '.join((x1,y1,z1))}), toe = SubElement (current_group, 'toe',{'':', '.join((x2,y2,z2))}) cost = SubElement(current_group, 'cost',{'':cost}) i+=1 head.set('total_holes', '%s'%i) indent.indent(root) tree.write(outfile) if (__name__ == "__main__"): sys.exit(main(sys.argv)) </code></pre> Now i get an error at x1,y1,z1,x2,y2,z2,cost = row and it is a value error that says: need more than one value to unpack
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<python><xml><csv><argparse>
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Changing file extensions using argparse in python
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