Converting number to string in python [closed]

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I am trying to express the result of "funct" as a string but nothing I've tried is working.

def funct(y):   
    rad = [2+y]
    return rad
z = 1;
a = funct(z);
print a
print str(a)
b = str(a);
print b
c = repr(a);
print c

Here's my output:

[3]
[3]
[3]
[3]

What am I missing? Thanks!

Edit: I meant that I'm trying to print it as a string without the brackets. Forgot to include that.

Your first print calls str implicitly, and the second and third prints are doing exactly the same. The fourth print uses repr, which happens to be equivalent to str for a list with integers. If you only want funct to return 2+4, use rad = (2+y) or just rad = 2+y, since [2+y] creates a list with one element. — André Laszlo
– André Laszlo, Commented Mar 2, 2014 at 20:39
possible duplicate of converting a list to a string in python — Max Leske
– Max Leske, Commented Mar 2, 2014 at 20:55

agconti · Accepted Answer · 2014-03-02 20:39:07Z

2

You probably don't want rad to be a list.

Try using () instead of []:

rad = (2+y)

Your function would work like so:

def funct(y):   
    rad = (2 + y)
    return rad
z = 1;
a = funct(z);
print a 
#=> "3"

edited Mar 2, 2014 at 20:39

answered Mar 2, 2014 at 20:36

agconti

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kojiro · Accepted Answer · 2014-03-02 20:40:14Z

Based on the title of your question, you don't want to change funct itself and you don't want to convert the output of funct into a string. If you want to change a number into a string you need to change the values inside the list output by funct. The problem is that you're turning the repr of the list itself into a string, but not casting the value in the list:

>>> repr([5])
'[5]'
>>> repr(["5"])
"['5']"

You actually want to cast the value in the list:

>>> repr(list(map(str, [5]))) # say `funct(3)` for example
"['5']"
>>> repr(list(str(i) for i in [5]))
"['5']"

Now, if you really just want to turn the output of funct into a string, you're already doing that. Python's just not printing quotes around the string representation of a list because it's printing it.

>>> repr([5]); print([5])
'[5]'
[5]

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