Python CSV reader return Row as list

2019-04-28 07:23发布

Im trying to parse a CSV using python and would like to be able to index items in a row so they can be accessed using row[0], row[1] and so on.

So far this is my code:

def get_bitstats():
    url = 'http://bitcoincharts.com/t/trades.csv?symbol=mtgoxUSD'
    data = urllib.urlopen(url).read()
    dictReader = csv.DictReader(data)
    obj = BitData()
    for row in dictReader:

        obj.datetime = datetime.datetime.fromtimestamp(int(row['0'])/1000000)
        q = db.Query(BitData).filter('datetime', obj.datetime)
        if q != None:
            raise ValueError(obj.datetime + 'is already in database')
        else:
            obj.price = row['1']
            obj.amount = row['2']
            obj.put()

This returns KeyError: '0' and I have no idea how to set it up. I did input this into an interactive shell and when running

for row in dictReader:
    print row

I get this as the output:

{'1': '3'}
{'1': '6'}
{'1': '2'}
{'1': '6'}
{'1': '9'}
{'1': '8'}
{'1': '6'}
{'1': '4'}
{'1': '4'}
{'1': '', None: ['']}
{'1': '4'}
{'1': '2'}
{'1': '.'}
{'1': '0'}
{'1': '5'}
{'1': '7'}
{'1': '1'}
{'1': '6'}
{'1': '0'}
{'1': '0'}
{'1': '0'}
{'1': '0'}
{'1': '0'}
{'1': '0'}
{'1': '0'}
{'1': '', None: ['']}
{'1': '0'}
{'1': '.'}
{'1': '0'}
{'1': '1'}
{'1': '0'}
{'1': '0'}
{'1': '5'}
{'1': '4'}
{'1': '2'}
{'1': '5'}
{'1': '0'}
{'1': '0'}
{'1': '0'}
{'1': '0'}
{'1': '1'}
{'1': '3'}
{'1': '6'}
{'1': '2'}
{'1': '6'}
{'1': '9'}
{'1': '8'}
{'1': '6'}
{'1': '4'}
{'1': '4'}

and on and on for thousands and thousands of lines. ( as Im sure the CSV is thousands of digits)

Why is my CSV printing this way and is there anyway to separate a row into a list of 3 ints such as [130534543, 47.00009, 23001.9000]

EDIT:

as the Answer states I was using the wrong csv function in my code above but even though fixing it gave me a list the list itself was in the same format as the dict such that:

['1']
['2']
['1']
['3']
['8']
['3']
['5']
.
.
.

It turns out I also had to remove the .read() from data = urllib.urlopen(url).read().

1条回答
走好不送
2楼-- · 2019-04-28 07:50

csv.reader will return each row as a list

reader = csv.reader(data)

for line_list in reader:
   pass
   # line_list is a list of the data contained in a row so you can access line_list[0]
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