CODEWITHSUNDEEP
pythonarrays
zee
zee

Reputation: 666

Concatenate string with array values

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.

Upvotes: 3

Views: 4371

Answers (4)

Wubao Li
Wubao Li

Reputation: 1748

concatenated_value = ' posted a challenge to '.join(name_strings)

Upvotes: 0

falsetru
falsetru

Reputation: 369224

  1. Remove ,:

    print "% posted a challenge to %s", %(name_strings)
#                                 ^

  2. The format specifier is incomplete. Replace it with %s.

    print "% posted a challenge to %s" %(name_strings)
#      ^

  3. 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)

  4. 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))

Upvotes: 2

Herman Schaaf
Herman Schaaf

Reputation: 48445

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.

Upvotes: 3

cjhanks
cjhanks

Reputation: 544

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

Upvotes: 4

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