python 3在float32中追加数组？

Question

When I loop through my data, a .csv file and assign values from each row to a array element // I need the values to be float32, how do I do that ? this works, but they are not the type that I want ? Basemap complains, Thanks!

csvReader = csv.reader(stores)
header = next(csvReader, None)
latIndex = header.index("lati")
lonIndex = header.index("long")

# Make an empty list
coordList = []

# Loop through the lines in the file and get each coordinate
for row in csvReader:
    lat = row[latIndex]
    lon = row[lonIndex]
    result = (lat, lon)
    coordList.append(result)    # how to make it float32 ?

Answer 1

Assuming you mean numpy.float32 (There is nothing called that in vanilla python):

lat = numpy.float32(row[latIndex])
lon = numpy.float32(row[lonIndex])