Thank to very much for replying. The second solution that you proposed worked
perfectly:
import csvdomains = open('top500domains.csv')domainsReader =
csv.reader(domains)domains = ["https://www."; + row[1] for row in
domainsReader]for domain in domains: print(domain) The above solution is
perfect and simple. It allows me to easily insert text such as "https://www."
in the beginning of my strings or at the end. However, something else that came
to mind was how would you break the string and insert new text in the middle.
For example:"www.lovepython.com"
I want to insert "lesson1." after the second period above. So it would come
back as: "www.lovepython.lesson1.com"First I thought row[1] in the code above
referred to the first place in the beginning of the string. So I tried to
change that number around but it did not work. I have a feeling I might be
mixing few concepts together... Thank you.
On Monday, June 29, 2015 10:19 PM, Steven D'Aprano <st...@pearwood.info>
wrote:
On Tue, Jun 30, 2015 at 01:05:13AM +0000, Nym City wrote:
> Hello all,
> Thank you for your time and tips. The reason why I decided to create a
> loop is because the output is cleaner and did not require any
> formatting. However, based on what I have learned from all of your
> responses, that is not going to work with what I am trying to do.
There's no reason why a loop wouldn't work, although there may be better
solutions, and a loop is a much better solution to what you have below.
> Here is the updated code:
> import csvdomains = open('top500domains.csv')domainsReader =
> csv.reader(domains)domainLists =
> list(domainsReader)print('\n'.join(["https://www ." + str(lst) for lst
> in domainLists]), sep='\n')
Please ensure you post as *plain text*, not HTML (so called "rich text"
or "formatted text"). When you post as HTML, many mail programs mangle
the code and destroy the formatting, as you can see above.
Reconstructing what the code should look like on five separate lines:
import csv
domains = open('top500domains.csv')
domainsReader = csv.reader(domains)
domainLists = list(domainsReader)
print('\n'.join(["https://www ." + str(lst) for lst in domainLists]), sep='\n')
The first three lines seem to be correct, but the next:
domainLists = list(domainsReader)
is unnecessary and should be deleted. However, the last line does too
much, and the wrong thing too. A simple loop is *much* better here,
since you just print the domains and don't need to keep them for further
processing:
for row in domainLists:
# row is a list of *one or more* fields; in this case, there
# is only one field per row, the domain name
domain = "https://www."; + row[0]
print(domain)
Suppose that you do need to keep the domains for later, as well as print
them. Then you can do this instead:
import csv
domains = open('top500domains.csv')
domainsReader = csv.reader(domains)
# Make a list of the domains.
domains = ["https://www."; + row[0] for row in domainsReader]
# Print each domain.
for domain in domains:
print(domain)
# Now continue to do more work on the list of domains...
--
Steve
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