🔒 Doesn't let me assign one array to another | Python | Page 1

novel basalt May 20, 2024, 1:47 AM

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import numpy as np
SIZE = 96
SHIFT = -SIZE/2

D2Q4 = np.zeros((SIZE + 1, SIZE + 1, 4))
D2Q4_new = D2Q4.copy()
D2Q5 = np.zeros((SIZE + 1, SIZE + 1, 5))
D2Q5_new = D2Q4.copy()
D2Q9 = np.zeros((SIZE + 1, SIZE + 1, 9))
D2Q9_new = D2Q4.copy()
velocity_model = [D2Q4, D2Q5, D2Q9]
velocity_model_new = [D2Q4_new, D2Q5_new, D2Q9_new]

for array in velocity_model:
    flag = velocity_model.index(array)
    print(len(velocity_model_new[flag][0][0]))
    print(len(array.copy()[0][0]))
    velocity_model_new[flag] = array.copy()

dense swiftBOT May 20, 2024, 1:47 AM

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novel basalt ```py import numpy as np SIZE = 96 SHIFT = -SIZE/2 D2Q4 = np.zeros((SIZE + 1, S...

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@novel basalt

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novel basalt May 20, 2024, 1:47 AM

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i get the following error

tulip jacinth May 20, 2024, 1:52 AM

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D2Q4_new = D2Q4.copy()
D2Q5 = np.zeros((SIZE + 1, SIZE + 1, 5))
D2Q5_new = D2Q5.copy()  # Corrected here
D2Q9 = np.zeros((SIZE + 1, SIZE + 1, 9))
D2Q9_new = D2Q9.copy()  # Corrected here```

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You are copying the D2Q4 array to all three of them.

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Change your code like that.

novel basalt May 20, 2024, 1:54 AM

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OOOPS

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this doesn't help

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import numpy as np
SIZE = 96
SHIFT = -SIZE/2

D2Q4 = np.zeros((SIZE + 1, SIZE + 1, 4))
D2Q4_new = D2Q4.copy()
D2Q5 = np.zeros((SIZE + 1, SIZE + 1, 5))
D2Q5_new = D2Q5.copy()
D2Q9 = np.zeros((SIZE + 1, SIZE + 1, 9))
D2Q9_new = D2Q9.copy()
velocity_model = [D2Q4, D2Q5, D2Q9]
velocity_model_new = [D2Q4_new, D2Q5_new, D2Q9_new]

print(id(D2Q4))
print(id(velocity_model[0]))
for array in velocity_model:
    print(id(array))
    flag = velocity_model.index(array)
    print(len(velocity_model_new[flag][0][0]))
    print(len(array.copy()[0][0]))
    velocity_model_new[flag] = array.copy()

still fog May 20, 2024, 1:57 AM

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!e ```py
import numpy as np
SIZE = 96
SHIFT = -SIZE/2

D2Q4 = np.zeros((SIZE + 1, SIZE + 1, 4))
D2Q4_new = D2Q4.copy()
D2Q5 = np.zeros((SIZE + 1, SIZE + 1, 5))
D2Q5_new = D2Q5.copy()
D2Q9 = np.zeros((SIZE + 1, SIZE + 1, 9))
D2Q9_new = D2Q9.copy()
velocity_model = [D2Q4, D2Q5, D2Q9]
velocity_model_new = [D2Q4_new, D2Q5_new, D2Q9_new]

print(id(D2Q4))
print(id(velocity_model[0]))
for array in velocity_model:
print(id(array))
flag = velocity_model.index(array)
print(flag)
print(len(velocity_model_new[flag][0][0]))
print(len(array.copy()[0][0]))
velocity_model_new[flag] = array.copy()

dense swiftBOT May 20, 2024, 1:57 AM

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@still fog :x: Your 3.12 eval job has completed with return code 1.

001 | 140422850182960
002 | 140422850182960
003 | 140422850182960
004 | 0
005 | 4
006 | 4
007 | 140422666139856
008 | Traceback (most recent call last):
009 |   File "/home/main.py", line 18, in <module>
010 |     flag = velocity_model.index(array)
011 |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^
... (truncated - too many lines)

Full output: https://paste.pythondiscord.com/NDN7CQOVDCUTY57ADN7EFXUMSU

still fog May 20, 2024, 1:57 AM

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!e ```py
import numpy as np
SIZE = 96
SHIFT = -SIZE/2

D2Q4 = np.zeros((SIZE + 1, SIZE + 1, 4))
D2Q5 = np.zeros((SIZE + 1, SIZE + 1, 5))

print(D2Q4 == D2Q5)

dense swiftBOT May 20, 2024, 1:57 AM

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@still fog :x: Your 3.12 eval job has completed with return code 1.

001 | Traceback (most recent call last):
002 |   File "/home/main.py", line 8, in <module>
003 |     print(D2Q4 == D2Q5)
004 |           ^^^^^^^^^^^^
005 | ValueError: operands could not be broadcast together with shapes (97,97,4) (97,97,5)

still fog May 20, 2024, 2:00 AM

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I don't have the slighest idea of what you are trying to do, but put it simply, that is just not how you are supposed to work with numpy in first place

in particular, creating a list of array of different shapes is a bit weird, and trying to .index() it even more so

novel basalt May 20, 2024, 2:00 AM

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i need to iterate through them

still fog May 20, 2024, 2:00 AM

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What for?

novel basalt May 20, 2024, 2:00 AM

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to not make 3 instances of a function

tulip jacinth May 20, 2024, 2:01 AM

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    print(len(velocity_model_new[i][0][0]))
    print(len(velocity_model[i][0][0]))
    velocity_model_new[i] = velocity_model[i].copy()```

novel basalt May 20, 2024, 2:01 AM

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omg

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its only way?

still fog May 20, 2024, 2:01 AM

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that (or enumerate) makes a lot more sense, but is still a bit weird

novel basalt May 20, 2024, 2:01 AM

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but wait

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lets see if it even works

fallen fable May 20, 2024, 2:02 AM

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wait, enumerate is weird? Why?

still fog May 20, 2024, 2:02 AM

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fallen fable wait, `enumerate` is weird? Why?

in general it is good
for this specific case, iterating over that list in first place is already weird

novel basalt May 20, 2024, 2:02 AM

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because i need 3 grapth

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graphs

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i need to plot them all in 1 figure

still fog May 20, 2024, 2:04 AM

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yeah no, that makes even less sense to me

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you're trying to plot something with shape (size, size, 9)?

novel basalt May 20, 2024, 2:05 AM

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i'm vectorizing it

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doesn't matter

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theres 3 matrixes

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needed to be plotted at every step on the same figure

still fog May 20, 2024, 2:06 AM

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hmm ok, go ahead and use enumerate() then, if it works it works

novel basalt May 20, 2024, 2:06 AM

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not sure how enumerate works

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using unicorns soution now

still fog May 20, 2024, 2:06 AM

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!e ```py
values = ['x', 'y', 'z']
for i, val in enumerate(values):
print(i)
print(val)

dense swiftBOT May 20, 2024, 2:06 AM

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@still fog :white_check_mark: Your 3.12 eval job has completed with return code 0.

still fog May 20, 2024, 2:10 AM

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forgot the range

novel basalt May 20, 2024, 2:11 AM

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ok now it works

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idk why it doesn't like me passing arrays to iterate through

dense swiftBOT May 20, 2024, 3:11 AM

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#🔒 Doesn't let me assign one array to another