redwood | The App Framework for Startups | GraphQL library

How do you concat numerous lists altogether into one single list, when there's a collection of lists assigned to only one variable already?

Most online advices has shown two or many variables to concat together, but mine's only a single variable assigned to many lists. I attempted at a nested For-Loop, but resulted in duplications and incoherent lists. Also attempted with extend and append functions with no success. Maybe I should approach this with Data Frame?

Any help is much appreciated. If you have questions, feel free to ask.

Actual Code:

I have code where I'm trying to index and pull data from a previous sheet. This code used to work, but now i'm getting a typeError when running the code.

I am trying to have an array be searched for a string by using a For loop, going through each spot of the array for its length. If the string is present, it should show that string (in this case, a letter). For some reason, even when that letter is there, the output is not being updated.

For example, say the word is DOG. The output array would look like '▢ ▢ ▢'. If I guessed 'D', it should update the output array to be 'D ▢ ▢'. The problem here is, it is not doing that.

This is my code related to this part:

I have 2 pandas dataframes:

1. state abbreviations and states.
2. state names and all the national parks in each state. This is not the whole dataframe.

I need to search for a user input in the state dataframe, in this case the state abbreviation, then take the adjacent value, the full name and use that to display the correct column from the parks dataframe. I am sure this could be easier if they were one dataframe, but I could not figure a way to do that and keep all of the functionality; I want to be able to display the state dataframe for the user. Any suggestions would be really appreciated. here is my code. Around line 72 I could use help. I kept as much out as i could while keeping this functional, it is a large program, but this is my biggest problem so far. thank you

Android emulator shows error when we launch a bare bone app, please see the screenshot attached. It works as expected for iOS.

I have tried all the default templates navbar,navdrawer and blank.

screenshot

This is an app directly from the getting started page and no modifications have been made to the template code.

My question is very similar to this one, except that I want to exclude all columns that have a unique value in a column. If we assume that to be the input.

I have a dataframe for all possible combinations of 2 stations in Caltrain and fare for the trip between them. I want to make a matrix of values but cannot understand how. Data looks like that:

I want to create the matrix with times to go from 1 station to another. I have done this matrix but I have some of the negative timedeltas in every column and row of the dataframe. It looks like that (it is a part of it):

I have a list of distance increase between every two adjacent stations in a railroad in the right order. What I need to do is to create a matrix for the distances between every two stations. This is this list.