I'm using Python and want to be able to create an array and then concatenate the values with a string in a certain format. I'm hoping below will explain what I mean.
name_strings = ['Team 1', 'Team 2']
print "% posted a challenge to %s", %(name_strings)
Where each value from name_strings will be placed in the %s spot. Any help is much appreciated.
One way might be to expand the array in to the str format function...
array_of_strings = ['Team1', 'Team2']
message = '{0} posted a challenge to {1}'
print(message.format(*array_of_strings))
#> Team1 posted a challenge to Team2
You're very close, all you need to do is remove the comma in your example and cast it to a tuple:
print "%s posted a challenge to %s" % tuple(name_strings)
Edit: Oh, and add that missing s in %s as @falsetru pointed out.
Another way of doing it, without casting to tuple, is through use of the format function, like this:
print("{} posted a challenge to {}".format(*name_strings))
In this case, *name_strings is the python syntax for making each element in the list a separate argument to the format function.
Remove ,:
print "% posted a challenge to %s", %(name_strings)
# ^
The format specifier is incomplete. Replace it with %s.
print "% posted a challenge to %s" %(name_strings)
# ^
String formatting operation require a tuple, not a list : convert the list to a tuple.
name_strings = ['Team 1', 'Team 2']
print "%s posted a challenge to %s" % tuple(name_strings)
If you are using Python 3.x, print should be called as function form:
print("%s posted a challenge to %s" % tuple(name_strings))
Alternative using str.format:
name_strings = ['Team 1', 'Team 2']
print("{0[0]} posted a challenge to {0[1]}".format(name_strings))
concatenated_value = ' posted a challenge to '.join(name_strings)
