JavaScript's "..." in Python? 😰

Spread Operator in JavaScript is one of the best thing given by GOD 😝

What is Spread Operator in JS?

Spread operator allows an iterable to expand in places where 0+ arguments are expected. It is mostly used in the variable array where there is more than 1 values are expected. It allows us the privilege to obtain a list of parameters from an array.

let arr1 = [1, 2, 3];
let arr2 = [4, 5];

// Spread Operator
let arr3 = [...arr1, ...arr2];
console.log(arr3); // [ 1, 2, 3, 4, 5 ]

What is ... in Python?

... or Ellipsis is a Python Object. It has no Methods. It is a singleton Object i.e, provides easy access to single instances.

# style1
def foo():
    pass

# style2
def foo():
    ...
# both the styles are same

More example

Use an Ellipsis in Numpy To Omit Dimensions

import numpy as np

A = np.random.rand(2, 3, 2)
print(A)
# [[[1.83948755e-01 7.34415667e-04]
#   [7.34273680e-01 3.92355559e-01]
#   [6.73369042e-01 2.93722630e-01]]
#
#  [[8.17789457e-01 1.13353920e-01]
#   [3.53150493e-01 2.70330813e-01]
#   [7.46381962e-01 7.42168707e-01]]]

print(A[:, :, 1])
# [[6.75415667e-04 4.58155559e-01 9.02622630e-01]
#  [9.13353920e-01 4.70330813e-01 6.42168707e-01]]

print(A[..., 1])
# [[6.75415667e-04 4.58155559e-01 9.02622630e-01]
# [9.13353920e-01 4.70330813e-01 6.42168707e-01]]

print(A[Ellipsis, 1])
# [[6.75415667e-04 4.58155559e-01 9.02622630e-01]
#  [9.13353920e-01 4.70330813e-01 6.42168707e-01]]

---

Conclusion

You can use ... or Ellipsis in place of pass in python. or use in numpy To omit dimensions.

---

Hurray! You just learned What is the difference between JS Spread Operator and ... Python.

---

I hope, you guys liked this quick tutorial. If so, then please don't forget to drop a Like ❤️

And also, help me reach 1k Subscribers 🤩, on my YouTube channel.

Happy Coding! 😃💻