﻿ Python: Sum two or more lists, the lengths of the lists may be different - w3resource

# Python: Sum two or more lists, the lengths of the lists may be different

## Python List: Exercise - 194 with Solution

Write a Python program to sum two or more lists. The lengths of the lists may be different.

Sample Solution:

Python Code:

``````def sum_lists_diff_length(test_list):
result =  [sum(x) for x in zip(*map(lambda x:x+*max(map(len, test_list)) if len(x)<max(map(len, test_list)) else x, test_list))]
return result

nums = [[1,2,4],[2,4,4],[1,2]]
print("\nOriginal list:")
print(nums)
print("Sum said lists with different lengths:")
print(sum_lists_diff_length(nums))

nums = [,[2,4,4],[1,2],]
print("\nOriginal list:")
print(nums)
print("Sum said lists with different lengths:")
print(sum_lists_diff_length(nums))
```
```

Sample Output:

```Original list:
[[1, 2, 4], [2, 4, 4], [1, 2]]
Sum said lists with different lengths:
[4, 8, 8]

Original list:
[, [2, 4, 4], [1, 2], ]
Sum said lists with different lengths:
[8, 6, 4]
```

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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

Capitalizes the first letter of a string:

Example:

```def tips_capitalize(s, lower_rest=False):
return s[:1].upper() + (s[1:].lower() if lower_rest else s[1:])
print(tips_capitalize('pythonTips'))
print(tips_capitalize('pythonTips', True))
```

Output:

```PythonTips
Pythontips
```

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