Arghavan A.

I am struggling to find the appropriate function that would return a specified number of rows picked up randomly without replacement from a data frame in R language? Can anyone help me out?

Does anyone know how to do convert from a string to a boolean in Python? I found this link. But it doesn't look like a proper way to do it. I.e. using a built in functionality, etc.The reason I... more

I have a Python datetime.datetime object. What is the best way to subtract one day?

I have the list [0, 1, 2, 3, 4] I'd like to make it into [1, 2, 3, 4]. How do I go about this?

I am writing a Python script in Windows. I want to do something based on the file size. For example, if the size is greater than 0, I will send an email to somebody, otherwise continue to other... more

What I want is to start counting time somewhere in my code and then get the passed time, to measure the time it took to execute few function. I think I'm using the timeit module wrong, but the docs... more

In Python, is the following the only way to get the number of elements?arr.__len__()If so, why the strange syntax?