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python – read .txt file line by line

I am trying to read every line of my file which contains a list of usernames and than make a login system with it. I am trying to implement a basic login system which has usernames stored in a .txt file but my code doesn’t work and I don’t know why. I think that the problem is in my loop

Creating multiple plots with for loop?

I have a dictionary of dataframes where the key is the name of each dataframe and the value is the dataframe itself. I am looking to iterate through the dictionary and quickly plot the top 10 rows in each dataframe. Each dataframe would have its own plot. I’ve attempted this with the following: This works, but only returns a plot

pandas explode column only non zero values

How to filter tolist or values below to get only non-zeros Data On Explode on Column D rows now becomes 9. But i want 4 rows in the output Expected result I got list(filter(None, [1,0,2,3,0])) to return only non-zeros. But not sure how to apply it in the above code Answer Simpliest is query: Output:

For Loop to populate Pandas dataframe

In below dataframe, I need to add +1 for all values which have 0: The end result should look something like below: I have tried ‘for loops’ but does not seem to work. Any suggestions? Answer Let us try cumsum to create a sequential counter then update values in col_a using boolean indexing:

Filter out specific errors from Flake8 results

We are writing notebooks in databricks. When we put them to git we want to run flake8 on them to check for new problems in the code. As databricks has some predefined variables those are undefined in the code itself. Is it possible to filter our errors like: While keeping errors like I am aware of the –ignore parameter, but

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