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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
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    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
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    List slicing is quite flexible as it allows to replace a range of entries in a list with a range of
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    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
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  • 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
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    joined_list = [item for list_ in [list_one, list_two] for item in list_] It has all the advantages of the newest approach of using Additional Unpacking Generalizations - i e you can concatenate an arbitrary number of different iterables (for example, lists, tuples, ranges, and generators) that way - and it's not limited to Python 3 5 or later




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