在Python中将经纬度长的数据库转换为utm数据

Question

I'm trying to convert a csv set up as [name | lat | long] into a new csv set out as [name | easting | northing | zone | --], but it keeps coming up with the error;

Traceback (most recent call last): File "E:\\ACES Mapping Project\\Data\\Latlong_data\\utm_request.py", line 25, in company = eachline[0] IndexError: list index out of range

I'm new to Python but had no problems when converting the original database of addresses and postcodes into lat and long with a very similar code so I'm unsure of what I've done wrong? Any help would be great thank you, I'm sorry if this is really obvious. My code is below.

import csv
import utm

# Here enter the lat and long column numbers;

lat_col = 1
long_col = 2

# Here enter the name of the csv file for reading (r) and writing (w)

reading = 'Eng_latlong_data.csv'
writing = 'eng_utm.csv'

rawdata = open(str(reading),'r')
csv1 = csv.reader(rawdata,delimiter='|')

newdata = open(str(writing),'w')
csv2 = csv.writer(newdata,delimiter='|')

# below code will read through each line in lat long file
# then convert to utm
# and finally write as a new line with 'company name', (easting, northing, zone number, zone letter)

for eachline in csv1:
    company = eachline[0]
    print(company)
    try:
        u = utm.from_latlon(float(eachline[1]), float(eachline[2]))
        csv.writerow([company, u[0], u[1], u[2], u[3]])
    except:
        print(' ...error')

rawdata.close()
newdata.close()

Answer 1

This is my fixed code, I'm sure it could be done with less but if it helps anyone, I just had blank lines in the csv file, which was fixed using the if and else statement. The if len() > 1 runs through the code only if the length of that line is more than 1, else it doesn't.

    import csv
    import utm

    # Here enter the lat and long column numbers;

    lat_col = 1
    long_col = 2

    # Here enter the name of the csv file for reading (r) and writing (w)

    reading = 'SIA_latlong_data.csv'
    writing = 'SIA_utm.csv'

    rawdata = open(str(reading),'r')
    csv1 = csv.reader(rawdata,delimiter='|')

    newdata = open(str(writing),'w')
    csv2 = csv.writer(newdata,delimiter=',')

    # below code will read through each line in lat long file
    # then convert to utm
    # and finally write as a new line with 'company name', (easting, northing, zone number, zone letter)

    for eachline in csv1:
        if len(eachline) > 1:
            try:
                company = eachline[0]
                print(company)    
                u = utm.from_latlon(float(eachline[lat_col]), float(eachline[long_col]))
                csv2.writerow([str(company), str(u[0]), str(u[1]), str(u[2]), str(u[3])])
                print('written')
            except:
                print(' ...ERROR')
        else:
            print(' ...blank line')

    rawdata.close()
    newdata.close()