python - if/else in a list comprehension - Stack Overflow
Since a list comprehension creates a list, it shouldn't be used if creating a list is not the goal; it shouldn't be used simply to write a one-line for-loop; so refrain from writing [print(x) for x in …
python - How to convert list to string - Stack Overflow
Apr 11, 2011 · How can I convert a list to a string using Python?
How can I find the index for a given item in a list?
Caveats Linear time-complexity in list length An index call checks every element of the list in order, until it finds a match. If the list is long, and if there is no guarantee that the value will be …
How do I make a flat list out of a list of lists? - Stack Overflow
Dec 3, 2016 · If your list of lists comes from a nested list comprehension, the problem can be solved more simply/directly by fixing the comprehension; please see How can I get a flat result …
Command to list all files in a folder as well as sub-folders in windows
Mar 11, 2015 · 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 …
How to concatenate (join) items in a list to a single string
Sep 17, 2012 · For handling a few strings in separate variables, see How do I append one string to another in Python?. For the opposite process - creating a list from a string - see How do I …
Array versus List<T>: When to use which? - Stack Overflow
Jan 12, 2009 · A List uses an internal array to handle its data, and automatically resizes the array when adding more elements to the List than its current capacity, which makes it more easy to …
join list of lists in python - Stack Overflow
Apr 4, 2009 · Is the a short syntax for joining a list of lists into a single list ( or iterator) in python? For example I have a list as follows and I want to iterate over a,b and c.
How to append multiple values to a list in Python
I am trying to figure out how to append multiple values to a list in Python. I know there are few methods to do so, such as manually input the values, or put the append operation in a for loop, …
Quick way to list all files in Amazon S3 bucket?
Jul 26, 2010 · I have an amazon s3 bucket that has tens of thousands of filenames in it. What's the easiest way to get a text file that lists all the filenames in the bucket?