The list() function in Python is a sequence type that can be used to create lists of any object type. The list’ object cannot be interpreted as an integer, so this will generate an error when trying to enter the following code:
This article is going to explain the difference between a list and an object in Python. Lists are more simple to understand because they can be ordered or unordered, which makes it easier for beginners. Object’s however are not as easy to understand because there are many different types of objects that require a lot of knowledge about how data structures work. However, if you’re looking for something with more power then list might not be the best choice but if you’re looking for something simpler than object might be better!
Objects are powerful and versatile tools in Python. A list is a sequence of items that can be either mutable or immutable. Lists are very useful for storing data, even when it changes frequently. One of the most important differences between objects and lists in Python is that an object has a defined type; whereas, lists only have one type: list. This blog post will explore some other difference between objects and lists in Python with examples so you know which to use when!
print(list(‘object’)[1]) This generates an error
Many people have trouble understanding the difference between an object and a list. The easiest way to understand is that objects are “things” while lists are “a collection of things”. Objects can be in multiple places at once, like your phone or car keys, so you could want to use objects when something needs to be shared among different parts of an app. Lists can only exist in one place at a time so they’re better for tasks because they keep everything together.
The list() function can be used to create a list of integers. Continuing on from the example above, this will generate an error:
print(list(‘object’)[0]) This generates an error
print(list(‘object’)) This is fine and prints []
Instead, use int(), which converts any object type into its equivalent integer representation:
print(int(“a”) + int(“b”)) Prints “ab”
print(int()) Returns 0 (empty string) ; also works with float(), str(), etc. as well as tuple() or other objects you may have defined in your own code to represent lists of data types that are not natively supported by Python
print(int(“list”)) Returns list() (empty list) as a tuple
print((0,)) Returns [0] as an empty tuple
print([]) Prints [] as an empty list. Note that this is different from int(), which would return 0 when given the value of [] and not consider it to be a valid argument for conversion.
The output will change depending on what type you enter into “object”:
If object has no numeric equivalent: returns list() or tuple(). For example, inputting str(‘a’) generates [‘str’] if there are no characters with ASCII values below 32 to represent ‘a’ in python’s encoding scheme; inputting u” generates [[]]
If object has an ASCII numeric equivalent: returns list(), tuple() or int(). For example, inputting ‘a’ generates [‘a’] if there are no characters with values below 32 to represent the value of obj in python’s encoding scheme. Inputting u” will generate [u”] as a list.
Lists from objects can be used anywhere that lists are needed and vice versa
For more information on converting between lists and tuples, see this article by Matt Harrison:
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“Lists”: “An ordered sequence datatype for storing multiple items.” – Wikipedia; “Tuples”: “A sequence datatype consisting of zero or more elements where every element is an immutable object.” – Wikipedia
Lists are mutable; tuples are immutable
When using lists, you can delete elements and add new ones. With a tuple, once an element is created it cannot be removed or edited. The contents of the list never change unless someone deletes them from the list altogether
“Lists”: “In python’s encoding scheme, inputting u” generates [[]].” – that means if there are no characters with values below 32 to represent the value of object in Python’s encoding scheme inputs ‘a’, generate [‘a’] as a list() instead because ASCII numeric equivalents for objects which correspond to those without numbers cannot be interpreted as integers (list()) when converting “object” into a string form.
