How to duplicate numbers in string n times?

Question

I have this string (61,62,63,64) and i want to tranform the string into (61,61,62,62,62,62,63,64).

I want to duplicate the numbers in the string n times, the 61 i want to duplicate twice, the 62 i want to duplicate four times, how do i code something that duplicates a number in the string n times?

Can you possible do something like have annother string that tells the computer how many times to duplicate each number? (61, 62, 63, 64,) (2,4,1,1)

What you've described is definitely possible, but Stack Overflow is not a code writing service. Try to find a solution on your own first, then ask about specific problems that you encounter. — Kexus, Apr 24 '20 at 14:56
will your input be 2 strings with data separated by ',' ?? Please elaborate? — Kuldeep Singh Sidhu, Apr 24 '20 at 14:57

score 1 · Answer 1 · answered Apr 24 '20 at 15:07

if both your inputs are strings:

a = '(61, 62, 63, 64,)'
b = '(2,4,1,1)'

a = [i for i in a[1:-1].strip().replace(" ","").split(",")]
a.remove('')
b = [int(i) for i in b[1:-1].strip().replace(" ","").split(",")]
result = "("
for i in range(len(b)):
    for j in  range(b[i]):
        result += a[i]
        result += ", "
result = result.strip()[:-1]+")"
print(result)

Riccardo Bucco · Accepted Answer · 2020-04-24T15:16:10.327

Here is a possible solution (if rep is a string and not a tuple, you just need to do rep = eval(rep)):

s = "(61,62,63,64)"
rep = (2,4,1,1)

# convert the string to a tuple
t = eval(s)
# compute the result as a tuple
result = tuple(x for i, x in enumerate(t) for _ in range(rep[i]))
# convert the result into a string
result = str(result)

If you want something more compact:

s = "(61,62,63,64)"
rep = (2,4,1,1)

result = str(tuple(x for i, x in enumerate(eval(s)) for _ in range(rep[i])))

Be careful with using eval!! Check this question for more info.

How to duplicate numbers in string n times?

2 Answers2