reading csv problem

[ajikoe@gmail.com]

Hello,

I use csv to take information from file.
import csv
reader = csv.reader(open ('t.csv'))

for row in reader:
print row # it is perfectly OK

---------------------------------------------------------------------
But If I use this code I have problem
import csv
reader = csv.reader(open ('t.csv'))

for row in reader:
print row # it is perfectly OK
for row in reader:
print row # it is not printed on the monitor???

Why does only the first print row work here?

TIA,
ajikoe

[Cameron Walsh]

Re: reading csv problem

ajikoe@gmail.co m wrote:

Hello,
>
I use csv to take information from file.
import csv
reader = csv.reader(open ('t.csv'))
>
for row in reader:
print row # it is perfectly OK
>
---------------------------------------------------------------------
But If I use this code I have problem
import csv
reader = csv.reader(open ('t.csv'))
>
for row in reader:
print row # it is perfectly OK
for row in reader:
print row # it is not printed on the monitor???
>
Why does only the first print row work here?
>
TIA,
ajikoe
>

Because reader is an iterator and has no means of going back to its
beginning.

You could make a list out of it:
lines = list(csv.reader (open('t.csv')) )
for row in lines:
print row
for row in lines:
print row

Hope it helps,

Cameron.

[ajikoe@gmail.com]

Re: reading csv problem

Thank you.


On Nov 15, 1:33 pm, Cameron Walsh <cameron.wa...@ gmail.comwrote:

aji...@gmail.co m wrote:

Hello,

>

I use csv to take information from file.
import csv
reader = csv.reader(open ('t.csv'))

>

for row in reader:
print row # it is perfectly OK

>

---------------------------------------------------------------------
But If I use this code I have problem
import csv
reader = csv.reader(open ('t.csv'))

>

for row in reader:
print row # it is perfectly OK
for row in reader:
print row # it is not printed on the monitor???

>

Why does only the first print row work here?

>

TIA,
ajikoeBecause reader is an iterator and has no means of going back to its

beginning.
>
You could make a list out of it:
lines = list(csv.reader (open('t.csv')) )
for row in lines:
print row
for row in lines:
print row
>
Hope it helps,
>
Cameron.