Recent questions tagged Python

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python - PyAudio does not work and breaks sound on ubuntu

Ok, so I installed pyaudio from the package python-pyaudio using apt-get , now when I Import and Invoke as follows ... a problem that I can fix? 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 - Altering a kivy property from another thread

I'm experimenting with some kivy code. I tried modifing a kivy property(text_colour) from a tread created with ... application in progress... 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 - get the i-th slice of the k-th dimension in a numpy array

I have an n-dimensional numpy array, and I'd like to get the i-th slice of the k-th dimension. There must be something ... :, i, ...] # ... 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 - Avoiding Memory Issues For GroupBy on Large Pandas DataFrame

Update: The pandas df was created like this: df = pd.read_sql(query, engine) encoded = pd.get_dummies(df, ... could mitigate the memory issue? 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 - Setting spines in matplotlibrc

For a strange reason I cannot find the way to specify spines configuration in Python's matplotlibrc file. Any ... matplotlib is here 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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371 views

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python - How to know which process is responsible for a "OperationalError: database is locked"?

I sometimes randomly encounter: OperationalError: database is locked in a process that updates a SQLite database, but ... : database is locked? 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 - Borderless matplotlib plots

Is there a way to save matplotlib graphs without the border around the frame while keeping the background ... suggestions are much appreciated. 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 - Identify groups of varying continuous numbers in a list

In this other SO post, a Python user asked how to group continuous numbers such that any sequences could just be ... : ranges.append(group[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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python - Rename downloaded files selenium

I'm using selenium to automatically download files in csv format from this page: https://catalog.data.gov/ ... .click() save_file_as(name) 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, filter rows which column contain another column

How can I filter rows which column contain another column? For example, if we have DT with two columns A, B, can ... lol' 'lolec' 'ram' 'rambo' See Question&Answers more detail:os...

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

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176 views

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python - How to add colorbars to scatterplots created like this?

I create scatterplots with code that, in essence, goes like this cmap = (matplotlib.color.LinearSegmentedColormap. ... in the same scatterplot. 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 - Understanding thread.join(timeout)

So the timeout param, for a thread, should stop the thread after timeout seconds (if it hasn't terminated yet). In ... thread 0 at time 3.0 end See Question&Answers more detail:os...

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

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422 views

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python - How to use xml sax parser to read and write a large xml?

I'm trying to remove all the project1 nodes (along with their child elements) from the below sample xml document ( ... can't make it to work. See Question&Answers more detail:os...

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

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212 views

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python - Enter to raw_input automatically

Just as an example, it might seem illogical. I have a get_name function as below, and wanted to write a automated ... / what should I add 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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251 views

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python - Compiling required external modules with cython

I'm building a standalone executable using Cython on Linux. I have the following code: import psycopg2 as pg ... that particular package too? See Question&Answers more detail:os...

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

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324 views

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python - Chinese unicode fonts in PyGame

How can I display Chinese characters in PyGame? And what's a good free/libre font to use for this purpose? See Question&Answers more detail:os...

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

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267 views

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python - Efficient serialization of numpy boolean arrays

I have hundreds of thousands of NumPy boolean arrays that I would like to use as keys to a dictionary. ( ... arrays of even higher dimensions. See Question&Answers more detail:os...

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

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810 views

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python - How to efficiently handle European decimal separators using the pandas read_csv function?

I'm using read_csv to read CSV files into Pandas data frames. My CSV files contain large numbers of decimals/ ... f) Any help is appreciated. See Question&Answers more detail:os...

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

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231 views

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python - Send with multiple CSVs using Flask?

I have an app that takes in some information, performs some calculations using pandas, and turns the final pandas data ... of them to a CSV? See Question&Answers more detail:os...

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

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128 views

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python - Get last access time of the file?

I want to get when the file accessed last time, I tried following code: import os, time os.system("python test ... time. what could be wrong? See Question&Answers more detail:os...

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

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332 views

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python - What is the difference between pip install and sudo pip install?

I tried installing Flask and a few packages using sudo in a virtual environment, but on trying to import ... to the virtual environment) See Question&Answers more detail:os...

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

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456 views

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python - How to make word boundary not match on dashes

I simplified my code to the specific problem I am having. import re pattern = re.compile(r'word') result = pattern ... " I want "match -word-" See Question&Answers more detail:os...

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

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561 views

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python - Getting ValueError: y contains new labels when using scikit learn's LabelEncoder

I have a series like: df['ID'] = ['ABC123', 'IDF345', ...] I'm using scikit's LabelEncoder to ... n_estimators=140) clf.fit(X_train, y_train) See Question&Answers more detail:os...

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

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148 views

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python - Replacing a RegEx with a string of characters with the same length

I want to replace XML tags, with a sequence of repeated characters that has the same number of characters of the ... can we use RegEx for this? See Question&Answers more detail:os...

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

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476 views

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python - Accessing dict elements with leading underscores in Django Templates

I am trying to access elements of a dict with keys that start with the underscore character. For example: ... on a ElasticSearch instance. 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 - What does `x[False]` do in numpy?

Say I have an array x = np.arange(6).reshape(3, 2). What is the meaning of x[False], or x[np. ... . EDIT 2 And closed it almost immeditely. See Question&Answers more detail:os...

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

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723 views

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python urllib2 - wait for page to finish loading/redirecting before scraping?

I'm learning to make web scrapers and want to scrape TripAdvisor for a personal project, grabbing the ... stackoverflow.com/a/3210737/1157283 See Question&Answers more detail:os...

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

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376 views

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python - Why does apply change dtype in pandas dataframe columns

I have the following dataframe: import pandas as pd import numpy as np df = pd.DataFrame(dict(A = np.arange(3), B ... pandas 0.17.1 python 3.4.3 See Question&Answers more detail:os...

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

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