Using LDCad flexible parts with Studio

Code:
import argparse,os,re



parser = argparse.ArgumentParser(description='LDCAD to Stud.io Converter')

parser.add_argument('file', help='name of input file')



args = parser.parse_args()

if os.path.exists(args.file):

    f = open(args.file,"r")

    in_data = f.readlines()

else:

    print(''.join([args.file," does not exist"]))

    #exit()



file_name = args.file.rsplit(".",1)[0]

output_file_name = ''.join([file_name + "_studio.ldr"])



output_buff = ""

output_file = output_file_name

just_started = False



for line in in_data:

    if line.startswith("0 FILE "):

        if output_file == output_file_name and len(output_buff) > 0:

            of = open(output_file,'a')

        else:

            if os.path.exists(output_file):

                print("Output File " + output_file + " exists, overwriting...")

            of = open(output_file,'w')

        of.writelines(output_buff)

        of.close()

        output_file = output_file_name

        loc_file_name = ''.join([file_name,"_subpart_",line[7:].rsplit(".",1)[0],".dat"])

        loc_file_name_split = loc_file_name.split(" ")

        loc_file_name = '_'.join(loc_file_name_split)

        print(loc_file_name)

        output_buff = ''.join(["0 FILE ",loc_file_name,"\n"])

        just_started = True

    else :

        if just_started and line.startswith("0 Name:"):

            output_buff += ''.join(["0 ",loc_file_name,"\n"])

        just_started = False

        if line.strip().endswith(".ldr"):

            num_fields = 0

            if line.startswith("1"):

                num_fields = 14

            if line.startswith("0 Name:"):

                num_fields = 2

            if not num_fields:

                print("This line cannot be handled, exiting...")

                print(line)

                exit()

            new_line = ''.join([line.rsplit(".",1)[0],".dat\n"])

            line_data = new_line.split(" ")

            new_line = ' '.join([' '.join(line_data[:num_fields]),'_'.join([file_name,'subPart','_'.join(line_data[num_fields:])])])

            output_buff += new_line

        else:

            output_buff += line

        if line[0].isdigit() and int(line[0]) > 1:

            output_file = loc_file_name

print(output_file)

of = open(output_file,'a')

of.writelines(output_buff)

of.close()