The first way works for a list or a string; the second way only works for a list, because slice assignment isn't allowed for strings. Other than that I think the only difference is speed: it looks …

Dec 16, 2011 · How can I create a list which contains only zeros? I want to be able to create a zeros list for each int in range(10) For example, if the int in the range was 4 I will get: [0,0,0,0] …

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 …

Sorted list: [20.455, 23.455, 24.455, 28.455] Are you sure you are not verifying list instead of sortedList [in above example] i.e. you are storing the result of stream() in a new List object and …

Sep 20, 2010 · What is the syntax to insert one list into another list in python? [duplicate] Asked 14 years, 10 months ago Modified 6 years, 1 month ago Viewed 349k times

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 …

Use a list of values to select rows from a Pandas dataframe Asked 12 years, 11 months ago Modified 4 months ago Viewed 1.8m times

Jul 8, 2018 · Is there a way in Python to list all installed packages and their versions? I know I can go inside python/Lib/site-packages and see what files and directories exist, but I find this very …

Dec 22, 2017 · You can get the unique values in the whole df with this one-liner: pd.Series(df.values.flatten()).unique() You basically transform your df to a numpy array, flatten …

Sep 14, 2015 · Another common mistake is to initialize a list but try to assign values to it using a key. The initialization probably happened dynamically and it's not clear later on that it's in fact …