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Tag: python

Python CSV Writer leave a empty line at the end of the file

the following code leave a empty white line at the end of the txt file. how can i not have the writerows not terminate the last line? Answer Firstly, since you are using with open as myFile you don’t need myFile.close(), that is done automatically when you remove the indent. Secondly, if you are willing…

Convert BytesIO into File

I have a BytesIO object containing the data of an excel document. The library I want to use doesn’t support BytesIO and expects a File object instead. How can I take my BytesIO object and convert it into a File object? Answer It would be helpful if you supplied the library you were using to work on exce…

Max and Min value for each colum of one Dataframe

Give this dataframe ‘x’: How I could get a list of pairs with the min and max of each column? The result would be: Answer You could define a function and call apply passing the function name, this will create a df with min and max as the index names: If you insist on a list of lists we can

How to add multiple values per key in python dictionary

My program needs to output a list of names with three numbers corresponding to each name however I don’t know how to code this is there a way I could do it as a dictionary such as cat1 = {“james”:6, “bob”:3} but with three values for each key? Answer The value for each key can ei…

Print a dictionary into a table

I have a dictionary: I would like to output it as: Is it a good way to first convert them into a list of dictionaries, and then write them into a table, by the method in https://stackoverflow.com/a/10373268/156458? Or is there a way better in some sense? Answer Rather than convert to a list of dictionaries, d…

Slicing a dictionary

I have a dictionary, and would like to pass a part of it to a function, that part being given by a list (or tuple) of keys. Like so: Now, ideally I’d like to be able to do this: … but that’s not working, since it will look for a key matching the tuple (1,5), the same as d[1,5]. d{1,5}

flask socketio CORS

I’ve been trying to send data from flask over socket io. I need to access this data from a different origin, but it is giving a CORS error. I have tried using all kinds of cross origin stuff and none of it has worked. Can somebody help with this. The view that should be called thought socket io: Running…

Why do people create virtualenv in a docker container?

You can build a container with Dockerfile in a few seconds. Then why do people need to install a virtual enviroment inside the docker container? It’s like a “virtual machine” in a virtual machine ? Answer I am working with virtualenvs in Docker and I think there are several reasons: you may …