Pandas read_excel is throwing an issue related to datetime conversion while reading an .xlsx or .xls file, but file doesn’t have any datetime columns
By using below code facing issue:
I am trying to read .xslx as well .xls file.
Why doesn’t fillna work as expected in pandas version 2.1.4?
This is my DataFrame:
Slick way to groupby function applied to column in pandas?
I have a pandas DataFrame where one column consists of datetime.date
objects. I was hoping to use groupby()
to count all entries in a given year and month without adding unnecessary columns to the dataframe.
How to change the value of a column based on a condition and an inner join?
I have two Pandas dataframes; let’s call them df_a and df_b.
Merging 2 DataFrame to find different rows
I have two DataFrames that contain some log data, lets call them CorrectData and WrongData
How to set value to a slice of a multi-index dataframe from another slice
I have a multi-index pandas dataframe, and I need assign the value to a slice of the dataframe (based on one index), with a calculation on another slice of the same dataframe (based on the same index).
I have tried to assign the values using loc, but the entire slice ends up NaN.
I have written this simple example code to make clear the problem I’m having.
How to set only a subset of columns and rows to nan in a pandas dataframe based on a condition? [duplicate]
This question already has answers here: Pandas DataFrame: replace all values in a column, based on condition (10 answers) Closed last month. I have a pandas dataframe (let’s call it df), and one of the columns of this df (let’s say column 10) specifies if a sensor has acquired data (1 it did, 0 it […]
Convert category structure to merge with other df
I have 2 dfs, the first df has transactions that each have a category id, the categories are multi layered and the number of layers varies. The 2. df has the categories. for each category it has the category id and the parent id. I would like to prepare df 2 in such a way that i can merge it with df 1 and then have all the layers of the categories in df1.
sampling unbalanced data frame columns
If I have a data frame df
, which has five columns: ‘A’, ‘B’, ‘C’, ‘D’, and ‘E’, which contains python strings. Currently, ‘B’, ‘C’, ‘D’, and ‘E’ has unbalanced unique values (i.e., some unique values have more rows than the others). How can I sample df
so that column ‘B’, ‘C’, ‘D’, and ‘E’ have balanced number of unique values (i.e., each unique value in a specific column has the same number of rows)? I want to sample with replacement so that the resulting data frame has the same length as the original data frame, though some rows may be duplicated and some may be omitted. Thanks!
How to divide values in columns in one dataframe by the same value in another df in Pandas?
I want to divide all values from particular columns in the dataframe rpk
by the same value from the dataframe scaling_factor
, according to sample_name. I know how to do it for a particular value (e.g. for the column ‘P1-6’ in rpk
all the values should be divided by 2 – according to value factor
for ‘P1-6’ in scaling_factor
dataframe) but how to do it for all samples?.