[Python] How to ignore the first line of data when processing CSV data?

I am asking Python to print the minimum number from a column of CSV data, but the top row is the column number, and I don't want Python to take the top row into account. How can I make sure Python ignores the first line?

This is the code so far:

import csv

with open('all16.csv', 'rb') as inf:
incsv = csv.reader(inf)
column = 1
datatype = float
data = (datatype(column) for row in incsv)
least_value = min(data)

print least_value


Could you also explain what you are doing, not just give the code? I am very very new to Python and would like to make sure I understand everything.

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