﻿ Python: Generate all sublists of a list - w3resource

# Python: Generate all sublists of a list

## Python List: Exercise - 33 with Solution

Write a Python program to generate all sublists of a list. Sample Solution:-

Python Code:

``````from itertools import combinations
def sub_lists(my_list):
subs = []
for i in range(0, len(my_list)+1):
temp = [list(x) for x in combinations(my_list, i)]
if len(temp)>0:
subs.extend(temp)
return subs

l1 = [10, 20, 30, 40]
l2 = ['X', 'Y', 'Z']
print("Original list:")
print(l1)
print("S")
print(sub_lists(l1))
print("Sublists of the said list:")
print(sub_lists(l1))
print("\nOriginal list:")
print(l2)
print("Sublists of the said list:")
print(sub_lists(l2))
```
```

Sample Output:

```Original list:
[10, 20, 30, 40]
S
[[], , , , , [10, 20], [10, 30], [10, 40], [20, 30], [20, 40], [30, 40], [10, 20, 30], [10, 20, 40], [10, 30, 40], [20, 30, 40], [10, 20, 30, 40]]
Sublists of the said list:
[[], , , , , [10, 20], [10, 30], [10, 40], [20, 30], [20, 40], [30, 40], [10, 20, 30], [10, 20, 40], [10, 30, 40], [20, 30, 40], [10, 20, 30, 40]]

Original list:
['X', 'Y', 'Z']
Sublists of the said list:
[[], ['X'], ['Y'], ['Z'], ['X', 'Y'], ['X', 'Z'], ['Y', 'Z'], ['X', 'Y', 'Z']]
```

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## Python: Tips of the Day

Creates a list of elements, grouped based on the position in the original lists:

Example:

```def tips_zip(*args, fill_value=None):
max_length = max([len(lst) for lst in args])
result = []
for i in range(max_length):
result.append([
args[k][i] if i < len(args[k]) else fillvalue for k in range(len(args))
])
return result
print(tips_zip(['a', 'b'], [1, 2], [True, False]))
print(tips_zip(['a'], [1, 2], [True, False]))
print(tips_zip(['a'], [1, 2], [True, False], fill_value = '1'))
```

Output:

```[['a', 1, True], ['b', 2, False]]
[['a', 1, True], [None, 2, False]]
[['a', 1, True], ['1', 2, False]]
```