Load a CSV with different row lengths

Peter Otten __peter__ at web.de
Tue Jul 29 09:37:33 CEST 2014

Ryan de Vera wrote:

> I am trying to load a csv with different row lengths. For example,
> I have the csv
> a,b
> a,b,c,d
> a,b,c
> How can I load this into python? I tried using both NumPy and Pandas.

The csv module in the standard library can deal with varying row lengths 
just fine:

>>> import csv
>>> with open("data.csv") as f:
...     data = list(csv.reader(f))
>>> data
[['a', 'b'], ['a', 'b', 'c', 'd'], ['a', 'b', 'c']]

Depending on your use case you may need to do some post-processing in your 
code (e. g. converting strings to numbers).

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