I want to produce a list of possible websites from two lists:
strings = ["string1", "string2", "string3"]
tlds = ["com', "net", "org"]
to produce the following output:
string1.com
string1.net
string1.org
string2.com
string2.net
string2.org
I've got to this:
for i in strings:
print i + tlds[0:]
But I can't concatenate str and list objects. How can I join these?
itertools.product is designed for this purpose.
url_tuples = itertools.product(strings, tlds)
urls = ['.'.join(url_tuple) for url_tuple in url_tuples]
print(urls)
* worked on lists so that you could just do ['.'.join(t) for t in strings * tlds] or the like. :-)
list, and implement any operator you like :-)A (nested) list comprehension would be another alternative:
[s + '.' + tld for s in strings for tld in tlds]
The itertools module provides a function that does this.
from itertools import product
urls = [".".join(elem) for elem in product(strings, tlds)]
The urls variable now holds this list:
['string1.com',
'string1.net',
'string1.org',
'string2.com',
'string2.net',
'string2.org',
'string3.com',
'string3.net',
'string3.org']
In [x], Out [y] stuff might be confusing to some people. Replacing those by >>> would have been sufficient in my eyes though...One very simple way to write this is the same as in most other languages.
for s in strings:
for t in tlds:
print s + '.' + t
{ }button. There's never a need to put<br>elements in the post. Either a blank line in between, or two spaces at the end of a line will create a paragraph/line break.