I’m facing a problem with making a 3D plot. I want to build a 3D surface plot like below from three columns of data. Expected graphic case I have implemented a few currently, as shown below. Current picture case But I still don’t know how to make it “grid” like the first picture? Does …
Tag: python
Vectorization assign the newest value based on datetime
I have two dataframe. The first dataframe have only one column: email, the first dataframe is a complete list of email. The second dataframe is a dataframe with three column: email, subscribe_or_unsubscribe, date. The second dataframe is a history of user subcribing or unsubscribing from the email system. The…
XMLFeedSpider not Producing an Output CSV
Having an issue with XMLFeedSpider. I can get the parsing to work on the scrapy shell, so it seems there is something going on with either the request, or the spider’s engagement. Whether I add a start_request() method or not, I seem to get the same error. No output_file.csv is produced after running th…
How do I uses Python’s multiprocessing.Value method with .map()?
I’m testing some code using multiprocessing to try to understand it, but I’m struggling to get the .Value to work. What am I doing wrong, it says p doesn’t exist? here’s my code: And I get this error: What should I do? Answer You only want a single instance of the shared value, p, to b…
efficient way to find the most recent entry in another dataframe for each entry of a dataframe indexed by datetime in pandas
I have two dataframes, and both of them are indexed by datetime. for example, the dataframe 1 is something below: and the dataframe 2 looks like: For each entry in dataframe 1, I want to find the most recent one entry in dataframe 2, and create a new column in dataframe 1 to setup the relationship between the…
python re.split function, how do I return the full character set?
I’m trying to use a regex pattern split this string into chunks seperated by any character. This prints [”, ’12’, ’56’, ‘1’] How do I use the split function to have it output the whole string, delimited by any character? IE [‘a12’, ‘b56’,…
Pygame displays a black screen
I did some research to see if I could fix my problem on my own but it has been fruitless so far. I’ve checked to see if I ran the .display command too much but I haven’t, the program will run without error but the screen appears black except when I close the window out, you can catch a glimpse
Parametrizing fixtures and functions without combinations
Here’s the thing: I have an Array2D class that receives parameters ‘shape’ and ‘val’. The constructor is as follows: I would like to perform tests on this class. To do this I have declared a variable ARRAY_CONFIG, which lists parameters for different two-dimensional arrays. Here …
Pandas convert dummies to a new column
I have a dataframe that discretize the customers into different Q’s, which looks like: What I want to do is adding a new column, Q, to the dataframe which shows which sector this customer is in, so it looks like: The only way I can think about is using for loop but it will give me a mess. Any other
Formatting a list of sentences extracted from text
I am trying to format a list neatly that I have extracted using regex. I would like to have each sentence in its own line and remove the n characters: Image of current output: Answer From OP’s image, text_1 is a list of strings. To remove the newline n characters from a string, you can use the string…