list with numbers and strings to single string python

Question

How do I print a list that has numbers and strings to a single string? For example, I have this list: ["(",3,"+",4,"-",3,")"], I would like it to be printed as :(3+4-4). I tried to use the join command, but I keep having issues with the numbers.

What was the issue with the numbers? Isn't that what the question is about? Pretty sure there will be a duplicate question. — Open AI - Opting Out
– Open AI - Opting Out, Commented Mar 24, 2015 at 22:42

Padraic Cunningham · Accepted Answer · 2015-03-24 22:37:44Z

2

You have to cast the ints to str, str.join expects strings:

l = ["(",3,"+",4,"-",3,")"]

print("".join(map(str,l)))
(3+4-3)

Which is equivalent to:

print("".join([str(x) for x in l]))

To delimit each element with a space use:

print(" ".join(map(str,l)))

edited Mar 24, 2015 at 22:37

answered Mar 24, 2015 at 22:30

Padraic Cunningham

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3 Comments

Twhite1195 Over a year ago

that actually did the trick, but, is there a way to have it create a space between each list element? I'm doing a RPN calculator, and when I return the results I must show 3 4 + 3 -

Twhite1195 Over a year ago

oooh I see, that makes a lot of sense xD, I've been trying it for hours, you really saved my life

Padraic Cunningham Over a year ago

No worries, glad it helped and that I could save your life with code ;)

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