Python print output to variable

Question

I would like to assign print output to some string variable

print "Cell:", nei, "from the neighbour list of the Cell:",cell,"does not exist"

Could you please advice?

Why not simply using `=`? Why are you complicating your life? — Maroun, Aug 26 '14 at 11:32
I'm not sure I understand your question. Are `nei` and `cell` variables? Do they have values? Are you trying to print them? — Cory Kramer, Aug 26 '14 at 11:32
`my_var = ' '.join(["Cell:", str(nei), "from the neighbour list of the Cell:", str(cell), "does not exist"]) + '\n'` is equivalent — freakish, Aug 26 '14 at 11:34

semptic · Answer 1 · 2014-08-26T13:25:00.110

3

Use simple string concatenation:

variable = "Cell: " + str(nei) + " from the neighbour list of the Cell: " + str(cell) + " does not exist"

or string formatting:

variable = "Cell: {0} from the neighbour list of the Cell: {1} does not exist".format(nei, cell)

edited Aug 26 '14 at 13:25

answered Aug 26 '14 at 11:38

semptic

645
4
15

1

The variables may not be strings necessarily. – Cory Kramer Aug 26 '14 at 11:39
this will fail if nei or cell are not strings, which could be the case depending on the coordinates used – user3684792 Aug 26 '14 at 11:40

TylerTemp · Answer 2 · 2014-08-26T11:51:33.460

It's not the way Python works. If you do NOT have enough reason, simpliy use =. But if you insist, you may do like this.(Again, it's very unnecessary)

    def printf(*args):
        together = ''.join(map(str, args))    # avoid the arg is not str
        print together
        return together
    x = printf("Cell:", nei, "from the neighbour list of the Cell:",cell,"does not exist")

If you are only try to join things into a string, there are many ways you can do:

x = ''.join(("Cell:", str(nei), "from the neighbour list of the Cell:",str(cell),"does not exist"))
x = "Cell:%s from the neighbour list of the Cell:%s"%(nei, cell)
x = "Cell:{} from the neighbour list of the Cell:{}".format(nei, cell)
x = "Cell:{key_nei} from the neighbour list of the Cell:{key_cell}".format({'key_nei':nei, 'key_cell':cell})

have a look at python's string formating and python's str

@ussrback Not very clear about your question. If want to write print output into a file, Have a look at [python redirect output to file](http://stackoverflow.com/questions/4675728/redirect-stdout-to-a-file-in-python). If you want to write to a csv file with csv module, you need to control it by yourself — TylerTemp, Aug 26 '14 at 12:05

Python print output to variable

2 Answers2