I am building my first tkinter application which works perfectly until I try to auto start it at boot. I have researched this topic and tried numerous things but nothing works correctly. I am running RPi4 with raspbian buster, python 3.7.3 and want this application to run on the RPI touch screen without requi…
Creating vector with intervals drawn from Poisson process
I’m looking for some advice on how to implement some statistical models in Python. I’m interested in constructing a sequence of z values (z_1,z_2,z_3,…,z_n) where the number of jumps in an interval (z_1,z_2] is distributed according to the Poisson distribution with parameter lambda(z_2-z_1) …
How to change column value with pandas .apply() method
I stumbled upon an issue while trying to take data from a CSV file, assemble a key and then creating a new CSV file with only the necessary data. Example data: ID1 Data1 Data2 Price1 Color Key ID2 Data3 Price2 12345/6 950/000 Pd950 996 G 4/20017/6 4/20017/6 950/000 1108 12345/6 333/000 Pd333 402 G 4/20017/6 4…
Check if an item is an instance but not a subclass
How can you check if an object is an instance of a class but not any of its subclasses (without knowing the names of the subclasses)? So if I had the below code: what would go in the #code space that would produce the output?: Because issubclass() and isinstance() always return True. Answer The object.__class…
Merge two Lists of different size
I have an issue with some part of my code, I’m fetching two apis and then mixing the results in one array: Initialy the two arrays seems like this (although they can be empty or with more or less data): Their shapes are: So of course, when I try to append them in the 2nd dimension: I get this error:
Add column to existing panas dataframe with values as ‘Top’ and ‘Bottom’
I want to create a column in the existing dataframe with values as ‘Top’ and Bottom’, catch is, size of the dataframe changes according to calculations. For example: I will always have even number of rows. Please suggest a solution, thanks! Answer I don’t know exactly how your data is,…
Graphene Python class doesn’t recognize self
I have the following Python module that implements Graphene. The problem is that resolvers that call other methods of the class raise this error: The line that rises the error is: if self.validate_path(path): I don’t know why, if method validate_path() is in the same class that the method that calls it.…
Python ctypes behaviour with variable types
I’m using a third party python library, that is using ctypes (it uses a dll). I’m not very familiar with ctypes. The lib offers a type definition and a structure definition as given in the minimum example below. I’m trying to assign the member variable myClassInst.MSGTYPE the value of the co…
Pandas compare and sum values between two DataFrame with different size
Suppose I have two Dataframes with different sizes: to which I have: and: Now I want to add a third column to df1 say total_volume, where it is the summation of the volume that lie between individual row of xlow and xup of df1. I can do this using: we can check the value of say the second row as:
Python grading system using if and for
I have list of name = jimmy, carolin, frank, joseph and their score is = 100 , 90, 70, 65 The grades are : and I put it like this I need to make it like this: Can some one help me please? Thank you in advance! Answer I added everything in one print statement, hope you can understand. Your