There are many values starting with ‘^f’ and ending with ‘^’ in a pandas column. And I need to replace them like below : Answer You don’t mention what you’ve tried already, nor what the rest of your DataFrame looks like but here is a minimal example: Output
Tag: dataframe
How to export pandas dataframe with Multi-index columns to Excel with column name in one level unmerged and column name in another level merged?
I have a pandas dataframe df which looks as follows: The columns are Multi-Index consisting of 3 levels. First level has Germany as country. Second level has some indicators, and third level has years. And there are some data in the pandas dataframe. I’d like to export this dataframe to Excel such that …
How do I reverse a cumulative count from a specific point based on a condition and then resume the count in a pandas data frame?
I am trying to count the number of days between dates (cumulatively), (grouped by a column denoted as id), however, I want to reset the counter whenever a condition is satisfied. I want to at the same time create a new column and add the values to that column for those particular rows. Additionally, I want to…
How do I do a groupby in python to split between orders?
I have a dataframe that shows order listing. How do I use it to find the number of orders that contain spicy food? Using this code gives me 2 Yes and 2 No, but it should actually be 2 Yes and 1 No as order 1001 is duplicated. Thank you. I would like to get an output that shows the
Group by calculation pandas
I have a dataframe after applying groupby: On this, I want to add a new column with the calculation: 10 / (no of items per category). For the example data, this would be: How can this be done? Answer Use Series.value_counts with Series.map: Or:
How to combine string from one column to another column at same index in pandas DataFrame?
I was doing a project in nlp. My input is: I need output like this: How can I achieve this? Answer You can use groupby+transform(‘max’) to replace the empty cells with the letter per group as the letters have precedence over space. The rest is a simple string concatenation per column: Used input: …
Sort a dict of DataFrames
I have a dict of data-frames like the following: symbols ={BTC: DF, ETH: DF, DOGE:df} where each DF looks like this. I am trying to sort the dict by the price_change in the last row. Answer You could figure out the sorting of the keys by using a lambda function on sorted, which gets the last price change per …
Get cross validation values of each fold as dataframes
I am performing Stratified Cross validation as given below: This outputs: I am trying to get the split or fold as a dataframe in each iteration. May I know how to pass these index values to get the dataframes corresponding each fold? Answer
Adding multiple constant values in a pandas dataframe column
I would like to know how to add multiple constant values of different lengths into a dataframe column. I know that we can add a single constant value (for example: 5) to a data frame column ‘A’ like this: But I want to have the dataframe something like the table below. As you can see, I need three…
How to convert each values in Data Frame to int and float in only one index row in Python Pandas?
I have Pandas Data Frame in Python like below: IDX is and index of this Data Frame. And I would like to add new row in this Data Frame which will calculate mathematic formula like: So for example: (250 – 120) / 250 = 0.52 So as a result I need something like below: because: I used code like below: