I am trying to split a pandas Dataframe into two, based on the value in the column “country”. If the value exists in the following list (EU-COUNTRY-CODES), the row should be added to a dataframe called “EU”, if it does not exist in the list I want to add the row to another dataframe. I…
Tag: python
Finding string with multiple condition between two data frame in python
I have two dataframe df1 and df2. df1 has 4 columns. I want to add a new column Count in df2 in such a way that for every row in df2 if any string from Intersection or Roadway column exists in overall df1 data frame even once or more, the count column will have a value of 1. For example
Find cells from vertices in pyvista PolyData mesh
I have a PolyData mesh, and I am trying to color some cells that contain given vertices. However, I need an efficient way to to this. For instance, this works, but it is way too slow for a large mesh: This is what I get, which is fine…I just need to do it much faster! Answer If you have the
How to click on the login button using selenium?
I am trying to log in to “investors.com,” but to do that, I need to click on the “Sign In” button. Currently, I am using selenium to achieve this task. Sadly, I have tried everything, but nothing seems to work. I am not sure why that is the case. Maybe, the website composition is diffe…
How to subtract values from a list with values from the same list?
I have the following list: I want to subtract the second value with the first value, the third with the second, and so on. The results I want to transfer into a new list. The output should be Answer You can do this : Output :
How to fill the nan’s at the end of every column with 0’s in pandas python?
I want to forward fill my dataframe with a custom value – like 0. But pandas dosent allow to ffill with custom value. It only takes the last available value in every column and fills the nan values at the end with it. So was wondering if there was a better way to do this in python. Expected Output: Answ…
How to combine several rows into one based on a similar key in pandas dataframe?
Lets say I have a dataframe like this: Column1 Column2 Column 3 Column 4 Column 5 Column 6 Column 7 Platform_key amazonwebservicesaws asiapacificmumbai 38.33 nan nan nan nan amazonwebservicesaws_asiapacificmumbai amazonwebservicesaws asiapacificmumbai nan nan nan nan 1.83 amazonwebservicesaws_asiapacificmumba…
Cast Python class to parent class
I have class A. I need to store an additional value on class A so I extend it, creating class B which includes a my_variable attribute. I have a load of code that uses class B, but at the end of that code, I need to return a class A object. How can I do this? Answer For all intents
Iterate through dict with keys being strings with index
I have a dictionary in the following form: I need to get 4 lists of the following form: I am trying to find a way to do it by including the key, for example to have an index form 1 to 2 and do string matching with “Pbat_ch[“+str(index)+”]”. Any better idea of how to achieve that? Answe…
Multiprocessing where new process starts hafway through other process
I have a Python script that does two things; 1) it downloads a large file by making an API call, and 2) preprocess that large file. I want to use Multiprocessing to run my script. Each individual part (1 and 2) takes quite long. Everything happens in-memory due to the large size of the files, so ideally a sin…