Category "dataframe"

Generate multiple new pandas dataframes using lists and for loops

I have the following dataframe: import pandas as pd import numpy as np from numpy import rec, nan df1=pd.DataFrame.from_records(rec.array([(202001L, 2020L, 'app

DataFrame is highly fragmented

I have the following code, but when I run it I receive the error: PerformanceWarning: DataFrame is highly fragmented. This is usually the result of calling fra

Python Bytes & Lists & Encryption

I'm using Fernet to encrypt my data with this implementation. Let's assume that I have these three data: data = [fernet.encrypt("Hello".encode()), fernet.encryp

Python: How do I save scholarly.search_pubs() result as a dataframe?

I used the following code to find an article using the scholarly.search_pubs() function: search_query = scholarly.search_pubs('A Bayesian Analysis of the Style

Iterating over a dataframe twice: which is the ideal way?

I am trying to create a dataframe for Sankey chart in Power BI which needs source and destination like this. id Source Destination 1 Starting a next point b 1

Read many parquet files from S3 to pandas dataframe

I've been researching this topic for a few days now and have yet to come up with a working solution. Apologies if this question is repetitive (although I have c

Error in creating dynamic columns from existing column having nested list of lists

I want to create two column from an existing column which contains nested list of list as values. Rows of record consisting of 3 companies participant and their

Apply function on pandas.DataFrame by group of values in a columns

I have a data frame object in pandas with columns (let's say) "group". There are 20 groups. I want to apply a function (sum) to multiple rows of the same groups

How to group by values in a column and find time difference using python?

I have a dataframe as shown below: Col A Time Col B Col C 123 2018-01-06 03:45:23 B 1 141 2018-01-08 12:45:55 C 0 123 2018-01-08 11:45:29 A 0 123 2018-01-08 01

Pandas create rows based on interval between to dates

I am trying to expand a dataframe containing a number of columns by creating rows based on the interval between two date columns. For this I am currently using

Fastest way to fill multiple columns by a given condition on other columns pandas

I'm working with a very long dataframe, so I'm looking for the fastest way to fill several columns at once given certain conditions. So let's say you have this

Adding Pandas column in custom function not working when using numpy

I have the following function: def create_col4(df): df['col4'] = df['col1'] + df['col2'] If I apply this function within my jupyter notebook as in create_c

Fastest way to count event occurences in a Pandas dataframe?

I have a Pandas dataframe with ~100,000,000 rows and 3 columns (Names str, Time int, and Values float), which I compiled from ~500 CSV files using glob.glob(pat

Getting the average value of each hour for specific columns in data frame

I have a data frame with the date/time passed as "parse_dates" and then set as the index column for the data frame. Flow Enter Leave

Convert pandas dataframe hourly values in column names (H1, H2,... ) to a series in a separate column

I am trying to convert a dataframe in which hourly data appears in distinct columns, like here: ... to a dataframe that only contains two columns ['datetime',

mode values under a categorical column in python appear in form of a list

I am using this code to get the mode of a categorical column: df.groupby('user_id')['product'].agg(pd.Series.mode).reset_index().rename(columns = {'product': 'm

Fill in missing variables of family relationship matrix

I have a dataframe of family relationships (parent, child, spouse, etc.) which is partially filled as per example below. I am trying to use R to fill in the mis

How to plot two plotly figures with common animation_frame

I am trying to plot both a scatterplot and a line plot, in the same figure. One is for objects and the other for lane markers. The outcome should be one figure

How to merge two dfs in pandas (based on datetime period), and add rows if duplicates

I have the following 2 dfs: diag id encounter_key start_of_period end_of_period 1 AAA 2020-06-12 2021-07-07 1 BBB 2021-12-31 2022-01-04 drug id start_datetime

How do I pass arguments to srvyr inside of a function?

so I'm using srvyr to calculate survey means of a variable (y) from a survey object, grouping by a categorical variable (x) from that same survey object, and th