Most elegant way to modify elements of nested lists in place

python nested-lists

for row in table:    row[1:] = [int(c) for c in row[1:]]

Does above look more pythonic?

python nested-lists

Try:

>>> for row in table:...     row[1:]=map(int,row[1:])... >>> table[['donkey', 2, 1, 0], ['goat', 5, 3, 2]]

AFAIK, assigning to a list slice forces the operation to be done in place instead of creating a new list.

python nested-lists

I like Shekhar answer a lot.

As a general rule, when writing Python code, if you find yourself writing for i in range(len(somelist)), you're doing it wrong:

try enumerate if you have a single list
try zip or itertools.izip if you have 2 or more lists you want to iterate on in parallel

In your case, the first column is different so you cannot elegantly use enumerate:

for row in table:    for i, val in enumerate(row):        if i == 0: continue        row[i] = int(val)

CodeHunter