I have two datetimes between which I would like to generate regular intervals of 4 hours (excluding the last interval, which can be less than 4 hours if there are less than 4 hours between the previous timestamp and end). I am stuck on interval generation with pandas.date_range, which only returns the end tim…
Tag: pandas
Extract strings from a Dataframe looping over a single row
I’m reading multiple PDFs (using tabula) into data frames like this: dataframe figure My intention is to use that value ‘330736 1′ into the variable “number” and ’30/09/2015’ into a variable “date”. The issue is that, although these values will always be l…
Sampling data from the pandas dataframe
I am trying to sample data from a big dataset. The dataset is like Code to generate a sample dataset The distribution of labels in the dataset is I created a new column in the dataset When I am trying to sample say 5000 items The distribution of the labels in the sampledf is not same as that in the
looping through several columns and rows from csv to fill a form
Have been trying to emulate examples posted earlier, yet got stuck. I have a simple web form: Last name, name, email, password, confirm password. Also a .csv with 4 columns that corresponds to the form So, all I want is to feed the 3 entries to the form and click “Sent” after each entry. I copycat…
pandas out of memory error after variable assignment
I have a very large pandas data frame and want to sample rows from it for modeling, and I encountered out of memory errors like this: MemoryError: Unable to allocate 6.59 GiB for an array with shape (40, 22117797) and data type float64 This error is weired since I don’t need allocate such large amount o…
How to test a set of values (not all) exist in a Pandas multiindex?
The isin() method applied to a Pandas index returns whether each index value is found in the passed set of values, but is there a possibility to test only a set of indexe values ? In the multiIndex below I would like to test if an index with level name s1 and level value E and level name d1 and
Pandas: forcing merge from multiple rows from Excel file into a single row(s) into single lines
I’ve been given a few sets of MS-Excel worksheets with a lot of nested data in areas, and I have researching for a few hours looking for a way to reduce each ‘id’ row to single rows. Specifically merging ‘Step ID’, ‘Install Steps’, and ‘Expected step’ into…
How to sort a dataframe with strings
I got an code running that imports an excel file, and i want to be able to sort some of the data in it and write it to a new excel file. I got the code working somewhat as I want, but can’t make it sort the values as wanted… I want to sort the df from the column named
dataframe operations – column attributes to new columns in a new subset dataframe with conditions
I have the dataframe df1 with the columns type, Date and amount. My goal is to create a Dataframe df2 with a subset of dates from df1, in which each type has a column with the amounts of the type as values for the respective date. Input Dataframe: df1 = Desired Output, if the subset of Dates are 2017-02-02 an…
How to store synonyms as column in data frame?
Want to store Getting result of below code in data frame. Two columns one is the actual name and another is each synonym in the new row. Want to store the result in data frame: Answer This is a possible solution: Here’s how you can use it: