How to unpack array in python
I have a variable data that is of Show
Is there a way to unpack them? I tried but it doesn't work:
MSeifert 137k32 gold badges318 silver badges333 bronze badges asked Sep 9, 2017 at 17:44
You could simply transpose it before unpacking:
Unpacking "unpacks" the first dimensions of an array and by transposing the your array the size-3 dimension will be the first dimension. That's why it didn't work with answered Sep 9, 2017 at 17:45
MSeifertMSeifert 137k32 gold badges318 silver badges333 bronze badges 0 You could unpack using
answered Sep 9, 2017 at 17:51
AlexanderAlexander 99.3k28 gold badges187 silver badges185 bronze badges Summary: in this tutorial, you’ll learn how to unpack a list in Python to make your code more concise. Introduction to the list unpackingThe following example defines a list of strings:
To assign the first, second, and third elements of the list to variables, you may assign individual elements to variables like this:
However, Python provides a better way to do this. It’s called sequence unpacking. Basically, you can assign elements of a list (and also a tuple) to multiple variables. For example:
This statement assigns the first, second, and third elements of the In this example, the number of variables on the left side is the same as the number of elements in the list on the right side. If you use a fewer number of variables on the left side, you’ll get an error. For example:
Error:
In this case, Python could not unpack three elements to two variables. Unpacking and packingIf you want to unpack the first few elements of a list and don’t care about the other elements, you can:
By putting the asterisk (
Output:
This example assigns the first and second elements of the Here’s another example:
Output:
This example assigns the first and second elements to variables. It packs the last two elements in a new list and assigns the new list to the
Summary
Did you find this tutorial helpful ? How do I unpack an element in Python?Summary. Unpacking assigns elements of the list to multiple variables. Use the asterisk (*) in front of a variable like this *variable_name to pack the leftover elements of a list into another list.
How do you unpack a range in Python?Unpacking in Python refers to assigning values in an iterable object to a tuple or list of variables for later use. We can perform unpacking by using an asterisk ( * ) before the object we would like to unpack.
Can you unpack Numpy array?To unpack elements of a uint8 array into a binary-valued output array, use the numpy. unpackbits() method in Python Numpy. The result is binary-valued (0 or 1). The axis is the dimension over which bit-unpacking is done.
Can we unpack lists in Python?We can unpack two Python lists into a single variable. It will return a tuple containing all the elements from both lists.
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