﻿ Python: Iterate over all pairs of consecutive items in a given list - w3resource

# Python: Iterate over all pairs of consecutive items in a given list

## Python List: Exercise - 135 with Solution

Write a Python program to iterate over all pairs of consecutive items in a given list.

Sample Solution:

Python Code:

``````def pairwise(l1):
temp = []
for i in range(len(l1) - 1):
current_element, next_element = l1[i], l1[i + 1]
x = (current_element, next_element)
temp.append(x)
return temp
l1 = [1,1,2,3,3,4,4,5]
print("Original lists:")
print(l1)
print("\nIterate over all pairs of consecutive items of the said list:")
print(pairwise(l1))
```
```

Sample Output:

```Original lists:
[1, 1, 2, 3, 3, 4, 4, 5]

Iterate over all pairs of consecutive items of the said list:
[(1, 1), (1, 2), (2, 3), (3, 3), (3, 4), (4, 4), (4, 5)]
```

Flowchart: ## Visualize Python code execution:

The following tool visualize what the computer is doing step-by-step as it executes the said program:

Python Code Editor:

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## Python: Tips of the Day

Returns True if the provided function returns True for every element in the list, False otherwise:

Example:

```def tips_every(lst, fn=lambda x: x):
return all(map(fn, lst))

print(tips_every([2, 4, 3], lambda x: x > 1))
print(tips_every([1, 2, 3]))
```

Output:

```True
True
```