I have the following line of code It basically, filts my multi index df by a specific level 1 column. Drops a few not wanted columns. And does the sum, of all the other ones. I took a glance, at a few of the documentation and other asked questions. But i didnt quite understood what causes the warning, and i
Tag: pandas
Defining Parent For a Dataset with Several Conditions in Pandas
I have a CSV file with more than 10,000,000 rows of data with below structures: I have an ID as my uniqueID per group: Data Format For defining parent relationship below conditions exist: Each group MUST has 1 Head. It is OPTIONAL to have ONLY 1 Senior in each group. Each group MUST have AT LEAST one Junior. …
Retrieving data from multiple parquet files into one dataframe (Python)
I want to start by saying this is the first time I work with Parquet files. I have a list of 2615 parquet files that I downloaded from an S3 bucket and I want to read them into one dataframe. They follow the same folder structure and I am putting an example below: /Forecasting/as_of_date=2022-02-01/type=full/…
Python pandas group by check if value changed then previous value
I’ve a problem with groupby function of pandas’s library. I’ve the following dataframe. id result date 400001 N 2020-07-03 400001 N 2021-09-09 400001 P 2021-10-27 400002 N 2020-07-03 400003 N 2020-06-30 400003 N 2022-04-27 400004 P 2020-06-30 400004 N 2022-04-27 I need to group by column …
How to use a pandas groupby to filter this dataframe?
Using Python how can you use a group-by to filter this dataset Start How can I make it so that where either the two conditions are accepted, filtering everything else that doesn’t meet these two criteria ID1 – Matches another ID1 and the Last3 are the same ID2 – Matches another ID2 and the F…
Pandas groupby filter only last two rows
I am working on pandas manipulation and want to select only the last two rows for each column “B”. How to do without reset_index and filter (do inside groupby) My attempt Required output Answer Try: Output:
how do I perform the following operation in python dataframe
below are my two dfs I want to replace the column ‘a’ of df with values in column ‘a’ of dd. Any empty rows are replaced by zero “only” for column ‘a’. All other columns of df remain unchanged. so column ‘a’ should contain 3,3,0,0,0 Answer This is pr…
How can I save multiple dataframes onto one excel file (as separate sheets) without this error occurring?
I have the following Python code: I’m reading the excel file which contains two sheets and then saving those sheets into a new excel file but unfortunately I’m receiving the following error: Any ideas on how I can fix this?. Thanks. Answer Change [0] to 0 in pd.read_excel(path, sheet_name = [0]) w…
How to find and calculate common letters between words in pandas
I have a dataset with some words in it and I want to compare 2 columns and count common letters between them. For e.g I have: And I want to have smth like that: Answer You can use a list comprehension with help of itertools.takewhile: output: NB. the logic was no fully clear, so here this stops as soon as
How to group by time-interval from bottom to top using Pandas resample functionality?
I am working with historic data of some stocks. I want to group data by certain time intervals (like 1hr, 3days, etc). Pandas gives amazing functionality of doing this with very less efforts using resampling. But it happens from top-to-bottom (below image). Like – Here, I want to group from bottom-to-to…