I have this pandas df which i imported from a csv: Is it possible for everything on the left to be grouped under fresh and everything on the right of the dates to be under column spoil in multiindex format. Such as, there is one column which contains [apple, banana, orange]. I want to do this because later wh…
Tag: pandas
Streamlit, Python, and Pandas: Duplicate keys and writing
With Python and Streamlit I’m build apps to assist teachers grading essays. In this segment of the app the user is provided with all the student submissions as .txt files. These files are displayed on the main screen, and users scroll down to display additional texts. In a sidebar there are input fields…
Use a multidimensional index on a MultiIndex pandas dataframe?
I have a multiindex pandas dataframe that looks like this (called p_z): I want to be able to select certain rows based on another dataframe (or numpy array) which is multidimensional. It would look like this as a pandas dataframe (called tofpid): I also have it as an awkward array, where it’s a (26692, …
Appending new value to the dataframe
Above code prints same value twice i.e. Why is it not appending NSEI at the end of the stocksList dataframe? Full code: Answer how your code is flawed Relying on the length of the index on a dataframe with a reworked index is not reliable. Here is a simple example demonstrating how it can fail. input: Pre-pro…
How to return an empty value or None on pandas dataframe?
SAMPLE DATA: https://docs.google.com/spreadsheets/d/1s6MzBu5lFcc-uUZ9B6CI1YR7P1fDSm4cByFwKt3ckgc/edit?usp=sharing I have this function that uses textacy to extract the source attribution. This automatically returns the speaker, cue and content of the quotes. In my dataset, some paragraphs have several quotati…
scikit preprocessing across entire dataframe
I have a dataframe: The data is an average response of the same question asked across 4 quarters. I am trying to create a benchmark index from this data. To do so I wanted to preprocess it first using either standardize or normalize. How would I standardize/normalize across the entire dataframe. What is the b…
how can get difference between a defined date and the dates from a csv file python
I have a list of dates and I want to get a difference from a defined one(I mean days) and append days calculated in a new column I get TypeError: unsupported operand type(s) for -: ‘DatetimeArray’ and ‘datetime.date’ Now how can I read the dates in csv file in the same format as the de…
How do I filter multi-level columns using notnull() in pandas?
I generate a multi-index dataframe that has some NAN values using this: Which will create something like this: I’d like to get rows of a specific subset of top-level columns (eg df[[‘baz’,’qux’]]) that have no nulls. For example in df[[‘baz’,’qux’]] I̵…
Iterate over column values matched value based on another column pandas dataframe
This is a followup to extract column value based on another column pandas dataframe I have more than one row that matches the column value and want to know how to iterate to efficiently retrieve each value when there are multiple matches. Dataframe is The below will always pick p3 So I tried to iterate like A…
Summing duplicates rows
I have a database with more than 300 duplicates that look like this: I want that for each duplicate shipment_id only original_cost gets added together and rates remain as they are. like for these duplicates: it should look something like this: is there any way to do this? Answer Group by the duplicate values …