On 03/03/2016 22:51, vlyamt...@gmail.com wrote:
i have list of strings "data" and i am trying to build reverse list data1
data1 = []
for i in range(len(data)):
j = len(data) - i
data1.append(data[j])
but i have the following error:
data1.append(data[j])
IndexError: list index out of range
At the first pass through the for loop, j is effectively set to
len(data). As Python is indexed from zero this will always take you
beyond the end of data, hence the IndexError.
am i doing it wrong?
Thanks
You are doing things the difficult way. First up, using the construct:-
for i in range(len(data)):
is usually not needed in Python.
There is a reversed function
https://docs.python.org/3/library/functions.html#reversed which will do
the job for you.
data1 = list(reversed(data))
Or use the slice notation
data1 = data[::-1]
--
My fellow Pythonistas, ask not what our language can do for you, ask
what you can do for our language.
Mark Lawrence
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