﻿ Creating multidimensional arrays with unspecified dimensions in Python

# Python: Creating multidimensional arrays with unspecified dimensions

## Python ellipsis (...) Data Type: Exercise-6 with Solution

Write a Python program that uses 'Ellipsis' to create a multidimensional array with unspecified dimensions.

Sample Solution:

Code:

``````import numpy as np
# Create a multidimensional array with unspecified dimensions
nums = np.array([[[1, 2], [3, 4]], [..., ...], [[5, 6], [7, 8]]])
# Print the array
print(nums)
``````

Output:

```[[list([1, 2]) list([3, 4])]
[Ellipsis Ellipsis]
[list([5, 6]) list([7, 8])]]
```

In the exercise above, we use 'ellipsis (...)' to represent unspecified dimensions in a NumPy array. The resulting array contains 'ellipsis' as placeholders for dimensions not explicitly specified. In this way, we can create multidimensional arrays without having to specify all dimensions in advance.

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## Python: Tips of the Day

Summing a sequence of numbers (calculating the sum of zero to ten with skips):

```>>> l = range(0,10,2)
>>> sum(l)
20
```

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