I’m trying to look in a dataframe, and find the median of data within a column based on another column. I have a dataframe with ‘zipcode’ data and ‘price’ data. I want to find the median of the ‘price’ based on the ‘zipcode’, and report it in a new column.…
Tag: pandas
pandas – creating new rows of combination with value of 0
I have a pandas dataframe like user_id music_id has_rating A a 1 B b 1 and I would like to automatically add new rows for each of user_id & music_id for those users haven’t rated, like user_id music_id has_rating A a 1 A b 0 B a 0 B b 1 for each of user_id and music_id combination pairs those
ValueError: Invalid classes inferred from unique values of `y` in XGBoost
I’m new to the Data Science field and I’m trying to apply XGBoost in a table having 5 rows × 46 columns and my last column is my target column. and the error I’m getting is Can anyone help me with the resolution? Answer I think you need to have the class numerotated from 0 to n-1 where n is
Print side by side .describe() in pandas
Hello so i have two columns that im using describe() and im getting their stats. I have something like this I want to print desk1 and desk2 below of each category.I am doing this: I get this : And i my desired output is this: I would like to not create a dataframe.Any solutions? Thanks in advance Answer What …
Combining multiple CSVs in pandas
I have multiple csv files (which I’ve moved into pandas dataframes) in a folder, each of which holds monthly website data and need to combine them by copying the Value column from each to make a new dataframe (which will ultimately be exported to another csv) A new csv file will be added to the folder e…
Concatenate columns at the end of a MultiIndex columns DataFrame
Consider the following DataFrames df : and df1: I want to concatenate the two DataFrames such that the resulting DataFrame is: What I run is pandas.concat([df1, df2, axis=1).sort_index(level=”kind”, axis=1) but that results in i.e. the column potato is appended at the beginning of df[“A̶…
Collapsing rows
I have the following table below: I would like to collapse Code_1 and Code_2 columns based on ID and Date. Based on what I have found online, I have tried the below snippet of code but it does not seem to be working. df= df.groupby([‘ID’,’Date’]).agg(”.join) DF: ID Date Count_Cod…
Python Pandas how to test equality between pandas columns that are category data types
I have large datasets that I cross-join with python pandas. Both datasets load in pandas and I convert all ‘object’ columns to ‘category’. The issue is I need to pd.query() against various ‘category’ dtype columns. When doing so with ‘category’ columns it return…
‘pyarrow’ is not installed – Snowpark stored procedure with Python
I have created this basic stored procedure to query a Snowflake table based on a customer id: It works fine but I would like my sproc to return a JSON object for the whole result set. I modified it thusly: It compiles without errors but fails at runtime with this error: What am I missing here? Answer You need…
How to append dataframe to an existing excel file with some rows of data in it?
I have an excel sheet which has 150 rows of data. Now, I want to append a dataframe to that sheet without deleting or replacing the data using python. I have tried code like this, it is deleting the existing content from the excel and writing the dataframe into it. And other solutions provided here but with n…