Assigning functional relu to a variable while inplace parameter is True Question: If I want to do ReLU operation after my convolution on x, and in my code I do: x = F.leaky_relu(x, negative_slope=0.2, inplace=True) Is this code wrong since I assign the relu to x variable while inplace is True? Ie. does it mean …
How to delete an entry from a numpy array in place, and retain it's initial shape? Question: Let’s say, that we have a numpy array storing large objects. My goal is to delete one of these objects from memory, but retain the initial structure of the array. The cell, under which this object was stored …
How to modify a Series(DataFrame) of Pandas in place during iterating? Question: I need to revice values in a Series(column) of Pandas according to another function. During iterating, after I get the result, I don’t want to lookup the series twice, becasue I guess that it wastes time and is not required. For example: import …
pandas – mask works on whole dataframe but on selected columns? Question: I was replacing values in columns and noticed that if use mask on all the dataframe, it will produce expected results, but if I used it against selected columns with .loc, it won’t change any value. Can you explain why and tell if …
pytorch sets grad attribute to none if I use simple minus instead of -= Question: This is a simple code to show the problem import torch X = torch.arange(-3, 3, step=0.1) Y = X * 3 Y += 0.1 * torch.randn(Y.shape) def my_train_model(iter): w = torch.tensor(-15.0, requires_grad=True) lr = 0.1 for epoch in range(iter): print(w.grad) …
RuntimeError: one of the variables needed for gradient computation has been modified by an inplace operation Question: In a pytorch model training process I get this error: RuntimeError: one of the variables needed for gradient computation has been modified by an inplace operation: [torch.cuda.LongTensor [128, 1]] is at version 8; expected version 7 instead. Hint: …
In-place modification of Python lists Question: I am trying to perform in-place modification of a list of list on the level of the primary list. However, when I try to modify the iterating variable (row in the example below), it appears to create a new pointer to it rather than modifying it. Smallest example of …
Pandas: drop columns with all NaN's Question: I have this DataFrame: 0 1 2 3 4 5 6 7 0 #0915-8 NaN NaN NaN NaN NaN NaN NaN 1 NaN NaN NaN LIVE WGT NaN AMOUNT NaN TOTAL 2 GBW COD NaN NaN 2,280 NaN $0.60 NaN $1,368.00 3 POLLOCK NaN NaN 1,611 NaN $0.01 …
Understanding inplace=True in pandas Question: In the pandas library many times there is an option to change the object inplace such as with the following statement… df.dropna(axis=’index’, how=’all’, inplace=True) I am curious what is being returned as well as how the object is handled when inplace=True is passed vs. when inplace=False. Are all operations modifying …
Difference between a -= b and a = a – b in Python Question: I have recently applied this solution for averaging every N rows of matrix. Although the solution works in general I had problems when applied to a 7×1 array. I have noticed that the problem is when using the -= operator. To …
