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] …

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 …

Apr 11, 2011 · How can I convert a list to a string using Python?

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 …

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

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 …

Just put the Where before the Select: var list=testList.Where(f=>f.Family=="").Select(n=>n.Name); In Linq you need to apply the filter before projecting (unless the filter applies to the results of …

Jun 30, 2025 · To ensure a consistent and high-quality experience, Google individually certifies and maintains a list of models that you can use with ChromeOS Flex. Model status Certified …

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 …

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 …