For Loop with lists

Question

I need help with some code with I can't get to work, I have to make code so that it prints;

Country    Capital
France     Paris 
Uk         London
Belgium    Brussels
etc..

This is what I have wrote so far..

Country = ["France","UK","Belgium","Spain"]
Capital = ["Paris","London","Brussels","Madrid"]
print("\n\t Country \t Capital")
for country in Country:
  print("\t",country)
for capital in Capital:
  print("\t",capital)

but it prints ;

 Country     Capital
 France
 UK
 Belgium
 Spain
 Paris
 London
 Brussels
 Madrid

i cant seem to get the capitals to be under the capital section. please help, thanks

I assume you mean `Belgium\tBrussels` in your expected output? — Patrick Haugh, Nov 21 '17 at 19:14
BTW, using `\t` like that won't align the columns properly. But you can do, eg `for country, capital in zip(Country, Capital): print("{:7} {}".format(country, capital))` — PM 2Ring, Nov 21 '17 at 19:23

score 4 · Accepted Answer · answered Nov 21 '17 at 19:15

4

It's because you're using two separate loops to print, so they come one after the other, you'll want one loop, like this:

Country = ["France","UK","Belgium","Spain"]
Capital = ["Paris","London","Brussels","Madrid"]
print("\n\t Country \t Capital")
for i in range(len(Country)):
  print("\t",Country[i], "\t", Capital[i], "\n")

That way, you'll have tab-separated columns instead of all the countries, then all the capitals.

answered Nov 21 '17 at 19:15

Will

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Note that your print syntax inside the for-loop only works in Python 3. To keep it compatible with both Python 2 and 3, I'd recommend changing the loop print statement to this: `print("\t%s\t%s" % (Country[i], Capital[i]))` – Niema Moshiri Nov 21 '17 at 19:17
@NiemaMoshiri, no, it works in Python 2 as well, just prints a tuple. – ForceBru Nov 21 '17 at 19:18
@ForceBru, But printing a tuple isn't the intended output format specified by OP: the output is supposed to be tab-delimited country-capital pairs – Niema Moshiri Nov 21 '17 at 19:19
1

@NiemaMoshiri The `print` function is available in Python 2.6+ via `from __future__ import print_function`. You really shouldn't use the `print` statement in new code these days. – PM 2Ring Nov 21 '17 at 19:26
@PM2Ring, I agree, but this import was not included in the solution. It should at least be mentioned for it to be complete – Niema Moshiri Nov 21 '17 at 19:28
1

@NiemaMoshiri The OP has tagged the question Python 3, so there's no need to make a solution that also works on Python 2. – PM 2Ring Nov 21 '17 at 19:35

Joe Iddon · Answer 2 · 2017-11-21T19:24:57.057

3

You can do this in a one-liner:

print("\n".join("\t".join(t) for t in zip(Country, Capital)))

output:

France  Paris
UK      London
Belgium Brussels
Spain   Madrid

edited Nov 21 '17 at 19:24

answered Nov 21 '17 at 19:16

Joe Iddon

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whoever downvoted, it was simply because I mis-copied from the terminl, the code works fine... – Joe Iddon Nov 21 '17 at 19:20
Yeah, downvote seems overzealous, I was about to add this to my answer if Joe didn't undelete. `zip` is a great (probably the intended) solution to this. – Will Nov 21 '17 at 19:21
1

I downvoted it because you're building a list of `None`s for no reason by using a list comprehension. One liners are all well and good, but this should be a regular `for` loop – Patrick Haugh Nov 21 '17 at 19:21
There's also a superfluous parenthesis after the call to `zip`. – ForceBru Nov 21 '17 at 19:24
@PatrickHaugh Would the current version be better? – Joe Iddon Nov 21 '17 at 19:25
1

How about this: `sum(map(bool, map(print, map('\t'.join, zip(Country, Capital)))))`? :D – ForceBru Nov 21 '17 at 19:26
@ForceBru Very cool! **:)** – Joe Iddon Nov 21 '17 at 19:28

For Loop with lists

2 Answers2