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Command to list all files in a folder as well as sub-folders in windows To print specific file present in the folders sub-folders for eg : If you want to list just the csv files then : dir b s A-D o:gn * csv >list txt If you want to also include xlsx files then the code is : dir b s A-D o:gn * csv * xlsx >list txt You can mention more file types in the same way P S Got to know this one from chatgpt :P
Get a list from Pandas DataFrame column headers Create a list of keys columns - object method to_list() and the Pythonic way: my_dataframe keys() to_list() list(my_dataframe keys()) Basic iteration on a DataFrame returns column labels: [column for column in my_dataframe] Do not convert a DataFrame into a list, just to get the column labels
Best way to remove elements from a list - Stack Overflow This makes indexing a list a[i] an operation whose cost is independent of the size of the list or the value of the index When items are appended or inserted, the array of references is resized Some algorithm is applied to improve the performance of appending items repeatedly; when the array must be grown, some extra space is allocated so the
Array versus List lt;T gt;: When to use which? - Stack Overflow Using e g List<Point> list, it would be necessary to instead say Point temp=list[3]; temp x+=q; list[3]=temp; It would be helpful if List<T> had a method Update<TP>(int index, ActionByRefRef<T,TP> proc, ref TP params) and compilers could turn list[3] x+=q; into {list Update(3, (ref int value, ref int param)=>value+=param, ref q); but no
How to list all installed packages and their versions in Python? For Windows 10, I think this is what you are looking for a list of available installed Pythons This is different from a list of packages as you can see below Also, on Ubuntu 20 04, I think the command is Python3 -0 list Yes, this works similar to node version manager c:\Users\user\AppData\Local\Programs\Python>py -0 list Python 0 not found!
Sum a list of numbers in Python - Stack Overflow a is a running reference to the previous value in the list, hence it is initialized to the first element of the list and the iteration occurs over the rest of the list, updating a after it is used in each iteration An explicit iterator is used to avoid needing to create a copy of the list using my_list[1:]
How can I filter items from a list in Python? - Stack Overflow my_list = ['foo','bar','baz','>=','5 2'] # With only_words = [token for token in my_list if token isalpha()] # Without only_words = filter(str isalpha, my_list) Personally I don't think you have to use a list comprehension for everything in Python, but I always get frowny-faced when I suggest map or filter answers