How does this python lambda work? My understanding: The lambda v3: v1(lambda v4: v3(v3)(v4)) becomes the argument v1, and the statement becomes lambda v2: v1(v2(v2)) with v1 binding to the lambda v3: v1(lambda v4: v3(v3)(v4)) But what is the status of v1 in lambda v3: v1(lambda v4: v3(v3)(v4))? An reference t…
Tag: lambda
Method for mapping dictionary values in complex list
Inputs I have a very complicated list of list. And i have a dictionary that has each element of the list as a key. I’m going to map each element of the list to the value of the dictionary. output I tried the following to use the for loop as little as possible. I would appreciate it if you could
Why does my code only work in Google Colab but not on my local machine?
I tried to run this code in Google Colab and it worked fine. If I run it on my home computer or connect Google Colab with my local computer it gives me Errors: They appear because of this function: in I know that I cannot pickle lambda functions but it really works in Google Colab. But I need to run
Trying to declare a lambda function inside command parameter for the button but it doesn’t work(Tkinter)
I’m trying to enter a function with parameters without calling it by using lambda but I bump into an error, do you know why? Here’s the function: All I’m trying to do is to change the accountName and accountPassword values for my code. Here’s where I’m trying to write it down: An…
How to upload pandas, sqlalchemy package in lambda to avoid error “Unable to import module ‘lambda_function’: No module named ‘importlib_metadata'”?
I’m trying to upload a deployment package to my AWS lambda function following the article https://korniichuk.medium.com/lambda-with-pandas-fd81aa2ff25e. My final zip file is as follows: https://drive.google.com/file/d/1NLjvf_-Ks50E8z53DJezHtx7-ZRmwwBM/view but when I run my lambda function I get the err…
How to download latest n items from AWS S3 bucket using boto3?
I have an S3 bucket where my application saves some final result DataFrames as .csv files. I would like to download the latest 1000 files in this bucket, but I don’t know how to do it. I cannot do it mannualy, as the bucket doesn’t allow me to sort the files by date because it has more than 1000 e…
Lambda path parameters are embedded inside path dictionary
I have some python AWS lambdas which are deployed using serverless framework and I was able to retrieve the path variables using: event.get(“variable”) I am not sure what has changed but now I need to retrieve these path parameters using: event.get(“path”).get(“variable”) I…
Lambda and vectorize in python
I’m learning data analysis while performing vectorized operation with lambda function it run at first but again run it shows error as TypeError: <lambda>() takes 1 positional argument but 2 were given sample data of tips.csv file This is the image that I run first which doesn’t show any erro…
How to write a function to fit data to a sum of N Gaussian-like peaks without explicitly defining the expression for every possible N?
I am trying to fit a progression of Gaussian peaks to a spectral lineshape. The progression is a summation of N evenly spaced Gaussian peaks. When coded as a function, the formula for N=1 looks like this: where A, e0, hf, S and fwhm are to be determined from the fit with some good initial guesses. Importantly…
how to properly apply a vector based function to a pandas dataframe column?
I am trying to apply a function that returns an specific date in an specific format, however I am struggling to apply this function to a new pandas dataframe column. Here’s what I got so far: The next error arises: KeyError: datetime.datetime(2021, 2, 1, 0, 0) Expected output could be a pandas dataframe…