Tag: pandas

Pivot and merge two pandas dataframes

I have two dataframes (taken from pd.to_clipboard(), suggest using pd.read_clipboard()) df_a: and df_b: What I am looking to do is add a third column to df_a, say ThirdVal, which contains the value in df_b where the DateField and Team align. My issue is that df_b is transposed and formatted awry compared to d…

How to count the number of times a combination appears in a binary table in Python?

pandas python

I need to create a Pandas DataFrame that contains two columns: Combination – contains tuples that describe a combination of products in the binary table (e.g., (“bread”, “eggs”)) Count – contains the number of times that this combination appeared in the binary table The bin…

Extracting the required information for a Script tag of scraped webpage using BeautifulSoup

beautifulsoup pandas python selenium web-scraping

I’m a webscraping novice and I am looking for pointers of what to do next, or potentially a working solution, to scrape the following webpage: https://www.capology.com/club/leicester/salaries/2019-2020/ I would like to extract the following for each row (player) of the table: Player Name i.e. Jamie Vard…

Pandas DataFrame Dividing a column by itself taking first element and divide all the rows and so on

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I have a DataFrame from Pandas: df1: Now I want to iterate over the rows. For every row, divided by the first elements of the same column and then iterate elements. Taking all the rows one by one and divided by the first element as standard in the denominator and all rows with second elements and so on. For e…

count plot for each categorical variable

pandas python

I have a dataset as below, where Q1,Q2,Q3 are categorical. How can I plot the x axis for each column, and y as the count of the value for each column, all in one plot. Sample out put Answer You can use value_counts on the columns and then plot: old answer A quick way using pandas only is: But this

Converting pandas dataframe to PySpark dataframe drops index

apache-spark dataframe pandas pyspark python

I’ve got a pandas dataframe called data_clean. It looks like this: I want to convert it to a Spark dataframe, so I use the createDataFrame() method: sparkDF = spark.createDataFrame(data_clean) However, that seems to drop the index column (the one that has the names ali, anthony, bill, etc) from the orig…

Python: Determining period of the day based on hour using a for loop and conditionals

datetime for-loop if-statement pandas python

I would like to name the period of the day based on hourly information to my dataframe. For this, I am attempting the following: However, when double-checking if the length of my day_period list is the same as that of my dataframe (df)… they differ and they shouldn’t. I can’t spot the mistak…

Fastest way to append a row to an existing data frame?

dataframe pandas python python-3.x

I know this question has been asked many a time, but none of the solutions already posted on this site is ideal. I have tested various methods found here, and timed them using IPython, I will post the results below: songs is a DataFrame with 4464 rows (initially) and 15 columns. I am fully aware DataFrame ind…

Change X Axis Values to Days of Week (Mon – Sun) in Seaborn/Pandas

matplotlib pandas python seaborn

I’m currently doing a sales analysis I found online, and was wondering how I could display the x axis values (Days of the Week) from their current order to Mon – Sun. I have grouped the days of the week the item was bought using: Which returns: I want this displayed in descending order, and a grap…