csv reading

[kgarr]

I am using this command to import a csv file

temp = [[float(val) for val in row] for row in csv.reader(file('data.csv','rUb')) ]

this reads in my data as an array of the rows in my data. How do I change it so that my data is in an array of columns of my data? Mainly, I want to be able to easily find the max and min values of each column in my data after loaded into Vizard.