python csv into dictionary

Question

I am pretty new to python. I need to create a class that loads csv data into a dictionary.

I want to be able to control the keys and value So let say the following c

Answer 1

I know this is a pretty old question, but it's impossible to read this, and not think of the amazing new(ish) Python library, pandas. Its main unit of analysis is a think called a DataFrame which is modelled after the way R handles data.

Let's say you have a (very silly) csv file called example.csv which looks like this:

day,fruit,sales
Monday,Banana,10
Monday,Orange,20
Tuesday,Banana,12
Tuesday,Orange,22

If you want to read in a csv in double-quick time, and do 'stuff' with it, you'd be hard pressed to beat the following code for either brevity or ease of use:

>>> import pandas as pd
>>> csv = pd.read_csv('example.csv')
>>> csv
       day   fruit  sales
0   Monday  Banana     10
1   Monday  Orange     20
2  Tuesday  Banana     12
3  Tuesday  Orange     22
>>> csv[csv.fruit=='Banana']
       day   fruit  sales
0   Monday  Banana     10
2  Tuesday  Banana     12
>>> csv[(csv.fruit=='Banana') & (csv.day=='Monday')]
      day   fruit  sales
0  Monday  Banana     10

In my opinion, this is really fantastic stuff. Never iterate over a csv.reader object again!