why python index is not showing the repeated letter index

Question

for ex: list = ['p','q','r','s',p']
if yunrun the code you see only index0 not the 3

Answer 1

missing a single quote at the last index.

Answer 2

Using enumerate(), mentioned by Kuba, returns a tuple like: (index, value). These can be unpacked to individual variables like:

a = "MXKLMN"
x = 'M'
print([i for i, e in enumerate(a) if e == x])
# output: [0, 4]

Answer 3

Kuba, after a restart of python it was ok. Sorry!

Answer 4

index allows you to set a start point for the search.

Like this, you can - for example using a loop - find later occurrences of that item.

numbers = (5, 7, 3, 6, 7)
print(numbers.index(7)) # 1
print(numbers.index(7, 2)) # 4

Answer 5

This is because the index syntax only returns the index of the first occurence of a particular element in a list or a string...
In order to find all the indices you can do:
If you know the substring then simply use the re module and then the findall syntax.. if you don't know then:
list = ['p','q','r','p']
new = []
for i in list:
new.append(list.count(i))

[HERE the new list has numbers like this:
[2,1,1,1,2]]

for i in new:
if i != 1:
print(new.index(i), end = " ")

I hope this helps you

Answer 6

If you want a quick solution to that, you might exploit enumerate() for this:

L = [1,2,3,4,2,3,1,1,4,5,3,2]
print(list(x[0] for x in enumerate(L) if x[1]==1))

This will create the enumerate object on the fly and will populate the indexes (x[0]) based on the values (x[1]) -- and will of course populate only those which equal to 1 (for example).

Answer 7

Lothar Really? I ran it as a code and it returns a proper output. I even removed the redundant list envelope around the enumerate, it's not needed:
https://code.sololearn.com/cY88j3vQE4Vw/?ref=app