I am getting an error TypeError: Iterator operand or requested dtype holds references, but the REFS_OK flag was not enabled when iterating numpy array of tuples as below: import numpy as np tmp = np.empty((), dtype=object) tmp[()] = (0, 0) arr = np.full(10, tmp, dtype=object) for a, b in np.nditer(arr): print(a, b) How to fix… Read More How to iterate numpy array (of tuples) in list manner

I have a pandas DataFrame with one column containing lists, like: >>> import pandas as pd >>> d = {‘A’: [1, 2, 3], ‘B’: [[0.1, 0.2, 0.3], [0.4, 0.5, 0.6], [0.7, 0.8, 0.9]]} >>> df = pd.DataFrame(data=d) >>> df A B 0 1 [0.1, 0.2, 0.3] 1 2 [0.4, 0.5, 0.6] 2 3 [0.7, 0.8,… Read More Pandas list unpacking to multiple columns

When I try to unpack a list data for a MySQL database query that has some columns with value 0, I get an error. Name (varchar) Apples(int) Candies(int) Color (varchar) John 5 0 Blue If I unpack my query result like: name, apples, candies, color = mylist I’ll get a NoneType error because candies values… Read More How to automatically unpack list that contains some 0 values in Python?

I’m still new to python and programming in general and it’s my first post here. I’m trying to draw a "house" shape with an X inside of it. I need to utilize a loop with a list that contains tuples which would be forward,left respectively. I figured what coordinates I would need to draw the… Read More Accessing tuple with turtle on python

What I have tried: def df(t,x,*system_constants): a,b,c,d,e,f,g,h,i,j,k,l,m = system_constants #unpack system constants #algebra with these constants to calculate something return something This returns an error when called, saying: "ValueError: not enough values to unpack (expected 13, got 0). Also (regardless of this error), it might be better to use a short form unpacking with a… Read More How do you unpack a tuple of variable number of parameters (*args) inside a function?

I’m very new to Python and came to a strange behaviour while tested my code. I’m searching over a tree and gather informations, depending on the direction i’m searching the tree. def my_func(): return (10,20) direction = ‘forward’ if direction == ‘forward’: a, b = my_func() else: a, b = 30,40 print (f’Direction is: {direction}\nThe… Read More Why unpacking doesn't work correctly when using an one line if-else statement