El lunes, 9 de enero de 2017, 14:09:09 (UTC+1), José Manuel Suárez Sierra
escribió:
> Hello, I am trying to make a code wich compares between 2 or several
> sequences (lists). It compares every element in a list with another list
> elements. For example, if we have a list_a=["a","b","c","d"] and
> list_b=["a","b"] I want to obtain a new list_c containing elements that match
> between these lists (a and b here), but, if for instance list_b were
> ["a","c"] the program must not store this data because they are not in same
> order.
>
> Said this, I wrote this code but it doesnt work:
>
> if __name__ == "__main__":
>
>
> def compare(a, b):
>
> i = 0
> j = 0
> c1 = []
>
> while a[i] == b[j]:
> c1.append(a[i])
> j = j+1
> i=i+1
>
> return c1
>
>
>
>
> cadena_1=raw_input("Introduce list 1 \n")
> cadena_2 = raw_input("Introduce list 2 \n")
>
>
> transf1=list(cad_1)
> transf2 = list(cad_2)
>
>
> print compare(transf1,transf2)
>
>
>
>
> Thank you
Thank you!
Here is my code, I dont understand why it doesnt work very well:
if __name__ == "__main__":
cadena_1 = raw_input("Introduce la cadena 1 \n")
cadena_2 = raw_input("Introduce la cadena 2 \n")
# n=input("De cuantas letras quieres hacer la comparacion?\n")
transf1 = list(cadena_1)
transf2 = list(cadena_2)
l1=len(transf1)
l2=len(transf2)
c3=[]
i=0
j=0
for transf1[i] in transf1:
for transf2[j] in transf2:
if transf1[i]==transf2[j]:
c3.append(transf1[i])
i=i+1
j=j+1
else:
j=j+1
print c3
This is the traceback:
line 18, in <module>
for transf2[j] in transf2:
IndexError: list assignment index out of range
If I have initialized j=0 (such as i) why does it not work?
I want the script to read sequence 1 and compares every element inside it with
elements in sequence 2 no mattering where it matches.
Thank you!
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