I’ve created a script using scrapy to fetch some fields from a webpage. The url of the landing page and the urls of inner pages get redirected very often, so I created a middleware to handle that redirection. However, when I came across this post, I could understand that I need to return request in proc…
Why doesn’t the break statement work in this program?
My program is supposed to tell users how many months it will take to double the money in their investment account. I am able to do the calculations correctly, but I’m unable to break out of the loop and print the statement that tells the user the final sentence “It will take x months to double you…
How to correctly pass a split function to TextVectorization layer
I’m defining a custom split callable for TextVectorization like this: resulting in: as seen above the split function is working correctly outside of the TextVectorization layer but failes when passed as a callable Answer Your split_slash function does not seem to properly tokenize the phrases. It is pro…
Does @staticmethod save any ram in CPython or Micropython?
When answering a recent question I repeated my assumption that one reason for using @staticmethod was to save ram, since a static method was only ever instantised once. This assertion can be found fairly easily online, (e.g. here) and I don’t know where I first encountered it. My reasoning was based on …
Dask dataframe: Can `set_index` put a single index into multiple partitions?
Empirically it seems that whenever you set_index on a Dask dataframe, Dask will always put rows with equal indexes into a single partition, even if it results in wildly imbalanced partitions. Here is a demonstration: However, I found no guarantee of this behaviour anywhere. I have tried to sift through the co…
Create new column in Pandas and fill down with a specific value
I have a dataset, df, where I would like to create a new column to my dataset and fill down this column with a specific value Data Desired Doing However, this is not actually creating the new column. Any suggestion is appreciated. Answer Simply try: df[‘plan’] = ’21’ Or df[‘plan&…
How to transfer data from one list to another in Django?
I’m doing a small to-to list, I’m stuck in views.py, there are to-do tasks, in-progress tasks and done tasks, I want to move a task from the to-do task list to the in-progress task list, I can’t figure out how to delete the data in the to-to task and make new data same as to-do task in the i…
Sum a list of string based on rule
I have a huge python list as the following example: I would like to join this information in this formatting: I have tried this code But it was not good, since I have something like: Do you have any idea how can I perform this task? Answer You can use itertools.groupby: It groups the items by whether each ite…
python pandas pulling two values out of the same column
What I have is a basic dataframe that I want to pull two values out of, based on index position. So for this: first_column second_column 1 1 2 2 3 3 4 4 5 5 I want to extract the values in row 1 and row 2 (1 2) out of first_column, then extract values in row 2 and row
Flask-CORS does not apply to responses returned by WSGI middleware
I have a Flask application that uses Flask-CORS, as well as a WSGI middleware that returns a custom response instead of the Flask app for some routes. For responses the middleware returns, Flask-CORS is not applied, so I’ve had to apply the CORS headers manually to that response. I tried reversing the o…