So I am working on this problem: Recall from the Number Systems unit the method for converting hexadecimal numbers to binary by converting each hex digit to its equivalent four binary digits. Write a Python function named hexToBinary with parameters (number, table) that uses this algorithm to convert a hexade…
Tag: python
Simulate autofit column in xslxwriter
I would like to simulate the Excel autofit function in Python’s xlsxwriter. According to this url, it is not directly supported: http://xlsxwriter.readthedocs.io/worksheet.html However, it should be quite straightforward to loop through each cell on the sheet and determine the maximum size for the colum…
PyCharm unresolved reference when importing class from other file
This problem has been driving me nuts. I am trying to import a class from a file in the same directory. PyCharm is giving me the “Unresolved reference” error. MyClass is defined in file.py. I have found these questions: Unresolved reference issue in PyCharm Pycharm: “unresolved referenceR…
Advertising on a tkinter program
My question is : is it possible to put ads on a tkinter program , something like google ads or something , because I made a program which a lot of people started using and I am not getting any benefits from it , is there a way ? Answer There is nothing built-in to tkinter, nor available as a
How to create a pivot table on extremely large dataframes in Pandas
I need to create a pivot table of 2000 columns by around 30-50 million rows from a dataset of around 60 million rows. I’ve tried pivoting in chunks of 100,000 rows, and that works, but when I try to recombine the DataFrames by doing a .append() followed by .groupby(‘someKey’).sum(), all my m…
Change multiple items in a list at one time in Python
Can I change multiple items in a list at one time in Python? Question1: For example,my list is I want to the third and fifth item become 99.I know I can do it by However, is there any easier way to do this? Question2:in the situation,my target value is[99,98], my index is [2,4],so my result would be [0,0,99,0…
Possible to create a @synchronized decorator that’s aware of a method’s object?
I’m trying to create a @synchronized wrapper that creates one Lock per object and makes method calls thread safe. I can only do this if I can access method.im_self of the method in the wrapped method. (1) What’s confusing is that the func parameter passed to my decorator changes type before it get…
Accessing elements of multi-dimensional list, given a list of indexes
I have a multidimensional list F, holding elements of some type. So, if for example the rank is 4, then the elements of F can be accessed by something like F[a][b][c][d]. Given a list L=[a,b,c,d], I would like to access F[a][b][c][d]. My problem is that my rank is going to be changing, so I cannot just have F…
Sum slices of consecutive values in a NumPy array
Let’s say I have a numpy array a containing 10 values. Just an example situation here, although I would like to repeat the same for an array with length 100. I would like to sum the first 5 values followed by the second 5 values and so on and store them in a new empty list say b. So b
Autobahn Python 0.9.3-3 raises exception related to “subscription_revocation”
I’m running Autobahn Python 0.9.3-3 and am getting a strange error and I can’t work out why. This only seems to be happening with newer Autobahn Python clients. Any ideas? I suspect upgrading Autobahn to the 0.10.x series will fix this, but unfortunately there are some backwards incompatible chang…