﻿ Python: Count the frequency of consecutive duplicate elements in a given list of numbers, use itertools module - w3resource

# Python: Count the frequency of consecutive duplicate elements in a given list of numbers, use itertools module

## Python Itertools: Exercise-31 with Solution

Write a Python program to count the frequency of consecutive duplicate elements in a given list of numbers. Use the itertools module.

Sample Solution:

Python Code:

``````from itertools import groupby
def count_same_pair(nums):
result = [sum(1 for _ in group) for _, group in groupby(nums)]
return result

nums = [1,1,2,2,2,4,4,4,5,5,5,5]
print("Original lists:")
print(nums)
print("\nFrequency of the consecutive duplicate elements:")
print(count_same_pair(nums))
```
```

Sample Output:

```Original lists:
[1, 1, 2, 2, 2, 4, 4, 4, 5, 5, 5, 5]

Frequency of the consecutive duplicate elements:
[2, 3, 3, 4]
```

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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