[Tutor] string to list

[Owain Clarke]

With thanks to all who made suggestions, this was what I settled on

f = open('testfile')
#(testfile consisting of 2 columns of data, as per Kent's suggestion)
data = []
for line in f:
line_data = [int(x) for x in line.split()]
data.append(line_data)

data.sort(key=lambda x:x[0])

print "sort by first key:", data

data.sort(key=lambda x:x[1])

print "sort by second key:", data


I would love a really clear explanation of lambda!

Owain