On Wednesday, February 5, 2014 7:46:04 PM UTC-5, Tim Chase wrote:
> On 2014-02-05 16:10, Zhen Zhang wrote:
>
> > import csv
>
> > file = open('raw.csv')
>
>
>
> Asaf recommended using string methods to split the file. Keep doing
>
> what you're doing (using the csv module), as it attends to a lot of
>
> edge-cases that will trip you up otherwise. I learned this the hard
>
> way several years into my Python career. :-)
>
>
>
> > reader = csv.reader(file)
>
> >
>
> > f = open('NicelyDone.text','w')
>
> >
>
> > for line in reader:
>
> > f.write("%s %s"%line[1],%line[5])
>
>
>
> Here, I'd start by naming the pieces that you get, so do
>
>
>
> for line in reader:
>
> location = line[1]
>
> value = line[5]
>
>
>
> > Also, I have to process the first column eg, "Toronto (Ont.)" into
>
> > "Toronto". I am familiar with the function find(), I assume that i
>
> > could extract Toronto out of Toronto(Ont.) using "(" as the
>
> > stopping character, but based on my research , I have no idea how
>
> > to use it and ask it to return me the string(Toronto).
>
>
>
> You can use the .split() method to split a string, so you could do
>
> something like
>
>
>
> if '(' in location:
>
> bits = location.split('(')
>
> # at this point, bits = ['Toronto ', 'Ont.)']
>
> location = bits[0].strip() # also strip it to remove whitespace
>
>
>
> > 1:What is the data format for line[1], if it is string how come
>
> > f.write()does not work. if it is not string, how do i convert it to
>
> > a string?
>
>
>
> The problem is not that "it is not a string" but that you passing
>
> multiple parameters, the second of which is invalid Python because it
>
> has an extra percent-sign. First create the one string that you
>
> want to output:
>
>
>
> output = "%s %s\n" % (location, bits)
>
>
>
> and then write it out to the file:
>
>
>
> f.write(output)
>
>
>
> rather than trying to do it all in one pass.
>
>
>
> -tkc
Hi Tim,
Thanks for the reply,
Does the split make a list or tuple?
also,
when i do location=line[1],
it gives me a error even though the program did run correctly and output the
correct file.
location=line[1]
IndexError: list index out of range
when i do print line[1], there is no error.
it is really strange
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