Displaying a RGB image in float64 Question: I have an image with data type uint8. I want to convert it to the data type float64 and display it. I expected to see the image as I displayed it with data type uint8. But the result is this: My original image is like this: Why is …
Generating new a column in dataframe given value falls within a certain range of another column value Question: Given the following dataframe: df = pd.DataFrame({‘A’:[random.randrange(0, 9, 1) for i in range(10000000)], ‘B’:[random.randrange(0, 9, 1) for i in range(10000000)]}) That may look like this: A B 0 8 3 1 3 0 2 8 4 3 …
Get average between consecutive pairs of numpy array Question: Say I have a numpy array like this [1,2,3,4,5] I want to generate an array that is the equal to the average of consecutive elements [1.5,2.5,3.5,4.5] Is there any efficient way to do this outside of just iterating through? I’m not really sure what to do …
How to use pd.melt to unpivot a dataframe where columns share a prefix? Question: I’m trying to unpivot my data using pd.melt but no success so far. Each row is a business, and the data contains information about the business and multiple reviews. I want my data to have every review as a row. My …
Correct formatting to send a list in Python as a parameter to the Google Web App in order to send the data to Google Sheets Question: I have a Python code in which I want to pass a DataFrame Pandas as a parameter and a URL also as a parameter in my request to the …
Python how identify if an instance has been changed without making a copy? Question: I’m trying to write a function to determine if an object has been modified at one point during the execution of the program. I don’t want to duplicate the object because this will take a lot of memory. My object is …
Program not returning to the beginning when choosing option 1 Question: Can anyone tell me where I have a mistake that my program ends when choosing option 1 and doesn’t take me back to the beginning? I think I have a mistake somewhere in the operation line. The program needs to by as defensive as …
How to reboot a WSGI application Question: There are a lot of implementation for the WSGI specification, like mod_wsgi and Phusion Passenger. Now I have bought a shared Python host which uses Phusion Passenger. AFAIK there is no standard for how to reboot a WSGI application, so each implementation has its own way. For example …
Split a csv file into multiple files based on a pattern Question: I have a csv file with the following structure: time,magnitude 0,13517 292.5669,370 620.8469,528 0,377 832.3269,50187 5633.9419,3088 20795.0950,2922 21395.6879,2498 21768.2139,647 21881.2049,194 0,3566 292.5669,370 504.1510,712 1639.4800,287 46709.1749,365 46803.4400,500 I’d like to split this csv file into separate csv files, like the following: File 1: time,magnitude …
How can I upload torrent video pieces to a video hosting service on the fly with limited RAM and disk usage Question: I’m working on a program that needs to upload video files that are stored using torrent to a video hosting service. However, I’m dealing with limited RAM and disk resources, so I can’t …
