concat two list based on array

[MeeranRizvi]

Here is my input

a=[1,2,3,4]
b=[5,6,7,8]

I need the output like this:

Output:
[1,5,2,6,3,7,4,8]

How to do this without build in function

[Mekire]

Please show us an attempt so we can further assist you.

[wavic]

Hello! Open a Python interpreter, input a=[1,2,3,4] then input dir(a) and see the output. It'll print all the 'a' methods.

[MeeranRizvi]

Hello Guys!
i just did the following code works as expected.

a=[1,2,3,4]
b=[5,6,7,8]
c=[]
for i in range(len(a)):
c.append(a[i])
c.append(b[i])
print c

Output:
[1, 5, 2, 6, 3, 7, 4, 8]

---

Thanks for the info #Wavic

---

how to make this output to look like this:

Output:
[1, 5, 2, 6, 3, 7, 4, 8]

Output:
[(1, 5), (2, 6),(3, 7),(4, 8)]

[wavic]

There is a better way to do it. Without a loop

[Mekire]

[(1, 5), (2, 6),(3, 7),(4, 8)]

If this is what you want, look into the zip function.

[MeeranRizvi]

Yeah i knew it,
BUt how to do without zip?

[nilamo]

Why would you want to do it without zip?

>>> a = [1, 2, 3, 4]
>>> b = [5, 6, 7, 8]
>>> list(zip(a, b))
[(1, 5), (2, 6), (3, 7), (4, 8)]
>>> [(a[i], b[i]) for i in range(min(len(a), len(b)))]
[(1, 5), (2, 6), (3, 7), (4, 8)]

[snippsat]

Why would you want to do it without zip?

Because this is a standard way many do education,do task without using stuff(forbid to use) that's build into python.
I do not like this way at all  
We even see student that have to use regex with html,because they can not a use parser.

[wavic]

Can you use enumerate()
Because of I still celebrate here is another way

In [1]: a=[1,2,3,4]

In [2]: b=[5,6,7,8]

In [3]: c = []

In [4]: for index, var in enumerate(a):
   ...:     c.append((var, b[index]))
   ...:    
In [5]: c

Out[5]: [(1, 5), (2, 6), (3, 7), (4, 8)]