Recent questions tagged PYTHON

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python - ConvergenceWarning: Stochastic Optimizer: Maximum iterations (10) reached and the optimization hasn't converged yet

I am trying sklearn to write about the training of a neutral_work on MNIST datasets. Why the optimizer did not ... set_yticks(()) plt.show() See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Is it preferable to return an anonymous class or an object to use as a 'struct'?

Considering memory use, clock cycles or good pythonic style is it better to do this: def func(): class A: ... having to use the square brackets. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - How to display parent directory in tree view?

In my application I have a QTreeview. I have a folder named "test" that contains many subfolders. The ... self.tree_click) return self.treeView See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Pandas DataFrame groupby overlapping intervals of variable length

I am trying to group a DataFrame by 2 columns (see example below). For the first column, I want each value ... 2. Any suggestion? Thanks ! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Any reason why matplotlib animations would only work in interactive session?

If I create a file test.py with the code import matplotlib.pyplot as plt from matplotlib.animation import ... this could be resolved? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Sympy substitute mathematical expression

I am trying to simplify a large expression by substitution of common smaller expressions. Here is the full ... large expression from above? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Sort nested dictionary by values

I am trying to sort a dictionary with another dictionary inside. This is how my dict looks like: {'POS2': { ... to implement this kind of sort ? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - How to save (pickle) a model instance in pyomo

I want to create a model instance and then save it so I can load and solve at a later time (the ... how to save a concrete model? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - What is the fastest way to prepare data for RNN with numpy?

I currently have a (1631160,78) np array as my input to a neural network. I would like to try ... len(output_y) return output_x, output_y See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - getpass.getpass() error without other code?

import getpass password=getpass.getpass(prompt="Password: ") print(password) This really simple code displays the ... know whats happening? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - unknown error: chrome failed to start

I've been stuck for days because of this issue and can't seem to find a solution. I can't get the ... in comments if I forgot something. Thanks See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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245 views

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python - Reduce number of levels for large categorical variables

Are there some ready to use libraries or packages for python or R to reduce the number of levels for large ... -k factors and "other". See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Multiple writes get handled as single one

I have a problem here with this code. I'm opening a socket, then listening to it with a while loop. I ... port and get one write after another. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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151 views

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python - How to use matplotlib with PyQt4

I want to plot a figure with embedded matplotlib in PyQt. I am using Qt Designer for the main window, and ... is very appreciated, thank you. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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522 views

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python - subprocess.Popen taking too long on WSL Linux

I have this subprocess.Popen() context manager: with Popen( args=command, shell=False, stdout=PIPE, bufsize=1, ... would be very helpful here. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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399 views

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python - Create a widget to embed into QMainWindow

I have this task that I couldn't solve yet. Working with PyQt and Qt Creator. I want to embed a custom created ... ) Any ideas how to solve it? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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353 views

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python - From a timezone and a UTC time, get the difference in seconds vs local time at that point in time

This should be very simple, but I can't quite figure it out in Python. I want to have a function which takes ... time, what is the local time? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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261 views

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python - Paste in the field of QTableView

I need to implement a function in python which handles the "paste" when "ctrl+v" is pressed. I ... .readItemFromStream(stream, self.pasteOffset) See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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204 views

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python - conda environment has access to system modules, how to prevent?

I noticed that when I create a new enviornment with conda, I can import python modules in that environment that ... as the user-level python? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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310 views

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python - Splitting a CSV file into equal parts?

I have a large CSV file that I would like to split into a number that is equal to the number of CPU ... be read successfully by csv.reader. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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357 views

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python - Reshape dataframe to dataframe with unlimited rows and filling zeroes where no values

Is there a way to reshape DataFrame to another with unrestricted rows. I just want a DataFrame with 3 columns, ... columns and rows you want.. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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830 views

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python - Using #-*- coding: utf-8 -*- does not remove "Non-ASCII character 'x90' in file hello.exe on line 1, but no encoding declared" error

I'm trying to convert a python file into an executable. So far so good. But when I try to run the ... there anything that I'm missing? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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423 views

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python - Tkinter: How can I dynamically create a widget that can then be destroyed or removed?

I am looking for a method to create widgets (most likely a Label) ad nauseam, with the caveat that they can be ... 2: Smear Jelly [Remove step] See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python 2.7 - ValueError: The truth value of a Series is ambiguous

>>> df.head() № Summer Gold Silver Bronze Total № Winter Afghanistan (AFG) 13 0 0 2 2 0 Algeria (ALG) 12 5 2 8 15 3 ... 0) | (df['Gold.1'] > 0) See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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203 views

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python - "if", and "elif" chain versus a plain "if" chain

I was wondering, why is using elif necessary when you could just do this? if True: ... if False: ... ... See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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201 views

1 answer

python - Filter numpy array to retain only one row for a given value

I have a large n x 2 numpy array that is formatted as (x, y) coordinates. I would like to filter this ... solve this problem. Thanks so much! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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214 views

1 answer

python - Find all cycles in a graph implementation

I have found a simple algorithm to find all cycles in a graph here. I need to print out the cycles too, is it ... of cycles: "+str(self.count) See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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197 views

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python - CUDF error processing a large number of parquet files

I have 2000 parquet files in a directory. Each parquet file is roughly 20MB in size. The compression used is ... the workarounds for the same? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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