﻿ Python: Interleave multiple lists of the same length. Use itertools module - w3resource

# Python: Interleave multiple lists of the same length. Use itertools module

## Python Itertools: Exercise-29 with Solution

Write a Python program to interleave multiple lists of the same length. Use the itertools module.

Sample Solution:

Python Code:

``````import itertools

def interleave_multiple_lists(list1,list2,list3):
result = list(itertools.chain(*zip(list1, list2, list3)))
return result

list1 = [100,200,300,400,500,600,700]
list2 = [10,20,30,40,50,60,70]
list3 = [1,2,3,4,5,6,7]
print("Original list:")
print("list1:",list1)
print("list2:",list2)
print("list3:",list3)
print("\nInterleave multiple lists:")
print(interleave_multiple_lists(list1,list2,list3))
```
```

Sample Output:

```Original list:
list1: [100, 200, 300, 400, 500, 600, 700]
list2: [10, 20, 30, 40, 50, 60, 70]
list3: [1, 2, 3, 4, 5, 6, 7]

Interleave multiple lists:
[100, 10, 1, 200, 20, 2, 300, 30, 3, 400, 40, 4, 500, 50, 5, 600, 60, 6, 700, 70, 7]
```

Python Code Editor:

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## Python: Tips of the Day

Inverts a dictionary with non-unique hashable values:

Example:

```def tips_collect_dictionary(obj):
inv_obj = {}
for key, value in obj.items():
inv_obj.setdefault(value, list()).append(key)
return inv_obj
ages = {
"Owen": 25,
"Jhon": 25,
"Pepe": 15,
}
print(tips_collect_dictionary(ages))
```

Output:

```{25: ['Owen', 'Jhon'], 15: ['Pepe']}
```

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