There are three meanings listed in OED's entry for the noun official, one of which is labelled obsolete. See ‘Meaning & use’ for definitions, usage, and quotation evidence.
The second, list(), is using the actual list type constructor to create a new list which has contents equal to the first list. (I didn't use it in the first example because you were overwriting that name in your code - which is a good example of why you don't want to do that!)
You cannot put lists in sets since lists are mutable and could change (which could affect whether they are duplicate to another list in the set). I would suggest a different approach for a list of lists, e.g. as covered in this question about removing duplicates from a list of lists.
By using a : colon in the list index, you are asking for a slice, which is always another list. In Python you can assign values to both an individual item in a list, and to a slice of the list.
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The meaning of OFFICIAL is one who holds or is invested with an office : officer. How to use official in a sentence.
OFFICIAL definition: 1. relating to a position of responsibility: 2. agreed to or arranged by people in positions of…. Learn more.
- a person appointed or elected to an office or charged with certain duties. 2. of or pertaining to an office or position of duty, trust, or authority: official powers. 3. appointed, authorized, or approved by a government or organization. 4. holding office. 5. public and formal; ceremonial.
Definition of official adjective in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.
of or relating to an office or to a position of duty, trust, or authority:[before a noun] official powers. appointed, authorized, recognized, or approved by a government or organization: an official flag.
If something is official, it's authorized and approved by somebody. If Gatorade is the official drink of the Olympics, somebody with authority has signed some papers and a deal has been made.
Noun official (plural officials) An office holder, a person holding an official position in government, sports, or other organization.
Official means approved by the government or by someone in authority. According to the official figures, over one thousand people died during the revolution. An official announcement is expected in the next few days. A report in the official police newspaper gave no reason for the move.
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I personally store my Mini 3 Pro batteries at the 2-1/2 lights level (2 of the 4 lights lit and a third one flashing). And I check them monthly to ensure they aren't self-discharging. You can also buy fireproof Li-Ion storage bags and boxes which in theory will protect your house if a battery decides to go up in flames.
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When reading, list is a reference to the original list, and list[:] shallow-copies the list. When assigning, list (re)binds the name and list[:] slice-assigns, replacing what was previously in the list. Also, don't use list as a name since it shadows the built-in.
I tried searching for a command that could list all the file in a directory as well as subfolders using a command prompt command. I have read the help for "dir" command but coudn't find what I was looking for.
Command to list all files in a folder as well as sub-folders in windows
How do I read every line of a file in Python and store each line as an element in a list? I want to read the file line by line and append each line to the end of the list.
How to read a file line-by-line into a list? - Stack Overflow
I'm looking for a quick way to create a list of values in C#. In Java I frequently use the snippet below:
Quick way to create a list of values in C#? - Stack Overflow
It is a list with six elements in it. To understand slicing better, consider that list as a set of six boxes placed together. Each box has an alphabet in it. Indexing is like dealing with the contents of box. You can check contents of any box. But you can't check the contents of multiple boxes at once. You can even replace the contents of the box.
What is the difference between list [1] and list [1:] in Python?