﻿ Python: Iterate over two lists simultaneously - w3resource

# Python: Iterate over two lists simultaneously

## Python List: Exercise - 64 with Solution

Write a Python program to iterate over two lists simultaneously.

Sample Solution-1:

Python Code:

``````num = [1, 2, 3]
color = ['red', 'white', 'black']
for (a,b) in zip(num, color):
print(a, b)
```
```

Sample Output:

```1 red
2 white
3 black
```

Pictorial Presentation: Flowchart: ## Visualize Python code execution:

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

Sample Solution-2:

Python Code:

``````def print_itr(itr1, itr2, fn):
for (itr1, itr2) in zip(num, color):
fn(itr1, itr2)
num = [1, 2, 3]
color = ['red', 'white', 'black']
print_itr(num, color, print)
```
```

Sample Output:

```1 red
2 white
3 black
```

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
```