Recent questions tagged python

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How can I redirect traffic that doesn't match any of my other URLs back to the home page? urls.py: urlpatterns = patterns('', url(r'^$', 'macmonster. ... I want to redirect via either an HTTP 301 or 302. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Why is pow(a, d, n) so much faster than a**d % n?

I was trying to implement a Miller-Rabin primality test, and was puzzled why it was taking so long (> 20 seconds) for midsize numbers (~7 digits). I ... 3 than with PyPy, when usually PyPy is much faster? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - How do I get Pyflakes to ignore a statement?

A lot of our modules start with: try: import json except ImportError: from django.utils import simplejson as json # Python 2.4 fallback. ...and it's the ... has an answer, I'll just read the source.) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Get coordinates of local maxima in 2D array above certain value

from PIL import Image import numpy as np from scipy.ndimage.filters import maximum_filter import pylab # the picture (256 * 256 pixels) contains bright spots ... (16-bit grayscale picture, 256*256 pixels) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - How to chain a Celery task that returns a list into a group?

I want to create a group from a list returned by a Celery task, so that for each item in the task result set, one task will be added to the group. ... (i) I don't need the result from the seconds task. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - How do I do dependency parsing in NLTK?

Going through the NLTK book, it's not clear how to generate a dependency tree from a given sentence. The relevant section of the book: sub-chapter on dependency ... sleep-7, my-6) pobj(in-5, sleep-7) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Write and read a list from file

This is a slightly weird request but I am looking for a way to write a list to file and then read it back some other time. I have no way to remake ... one group :) test data here this is another group :) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Scikit-learn's LabelBinarizer vs. OneHotEncoder

What is the difference between the two? It seems that both create new columns, which their number is equal to the number of unique categories in the ... data points depending on what category they are in. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - When to use imshow over pcolormesh?

I often find myself needing to create heatmap-style visualizations in Python with matplotlib. Matplotlib provides several functions which apparently do the same thing. ... or the other be a clear winner? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Can not activate a virtualenv in GIT bash mingw32 for Windows

When I try to activate my virtualenv from GIT bash mingw32 I do not get the expected response. NOTE: py is the folder for Python projects in my ... Scripts/deactivate: No such file or directory Any ideas? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Tensorflow r1.0 : could not a find a version that satisfies the requirement tensorflow

I want to install Tensorflow 1.o for python on windows. This is information for my system. D:>python --version Python 3.5.2 :: Anaconda 4.2.0 ... a supported wheel on this platform. What is the problem? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - pip install . creates only the dist-info not the package

I am trying to make a python package which I want to install using pip install . locally. The package name is listed in pip freeze but import <package> ... :: Python :: Implementation :: PyPy' ], ) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Print the actual query MySQLdb runs?

I'm looking for a way to debug queries as they are executed and I was wondering if there is a way to have MySQLdb print out the actual query that it ... 't been able to find the answer. Thanks in advance. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - pip no longer working after update error 'module' object is not callable

After a pip update, pip has stopped working completely. Z:>pip install matplotlib Traceback (most recent call last): File "c:program filespython37lib unpy.py" ... please? Edit: I am working on windows 10 See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - How to get day name from datetime

How can I get the day name (such as Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, and Sunday) from a datetime object in Python? So, for example, ... 6, 11, 33, 0) should give me "Friday". See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - What is the difference between subprocess.popen and subprocess.run

I'm new to the subprocess module and the documentation leaves me wondering what the difference is between subprocess.popen and subprocess.run. Is there a ... one just newer? Which is better to use? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Run manage.py from AWS EB Linux instance

How to run manage.py from AWS EB (Elastic Beanstalk) Linux instance? If I run it from '/opt/python/current/app', it shows the below exception. ... I think it's related with virtualenv. Any hints? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Single Django model, multiple tables?

I have several temporary tables in a MySQL database that share the same schema and have dynamic names. How would I use Django to interface with those ... a single model draw data from multiple tables? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Numpy vs Cython speed

I have an analysis code that does some heavy numerical operations using numpy. Just for curiosity, tried to compile it with cython with little changes and ... a simple example that shows the same thing. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - How can I visualize the weights(variables) in cnn in Tensorflow?

After training the cnn model, I want to visualize the weight or print out the weights, what can I do? I cannot even print out the variables after training. Thank you! See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - "import datetime" v.s. "from datetime import datetime"

I have a script that needs to execute the following at different lines in the script: today_date = datetime.date.today() date_time = datetime.strp(date_time_string, ... here and how do I get both to work? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - CSS Problems with Flask Web App

I can't get the CSS to output correctly - my webpages are all unstyled. This is my link in all my templates. What am I doing wrong? <link type="text ... Flask - do I have to have any special python code? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - How to create a conditional task in Airflow

I would like to create a conditional task in Airflow as described in the schema below. The expected scenario is the following: Task 1 executes If ... that. Could you please describe the solution? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Django required field in model form

I have a form where a couple of fields are coming out as required when I don't want them too. Here is the form from models.py class CircuitForm(ModelForm) ... I do so that the two fields aren't required? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Django DateField default options

I have a model which has a date time field: date = models.DateField(_("Date"), default=datetime.now()) When I check the app in the built in ... just the date? (datetime.today() isn't working either) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Redefining the Index in a Pandas DataFrame object

I am trying to re-index a pandas DataFrame object, like so, From: a b c 0 1 2 3 1 10 11 12 2 20 21 22 To : b c 1 2 3 10 11 12 20 21 22 ... c 1 11 12 10 NaN NaN 20 NaN NaN Any idea why this is happening? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Sort a list of lists with a custom compare function

I know there are several questions named like this, but they don't seem to work for me. I have a list of lists, 50 times 5 elements. I want ... anything but the return value was used. Sorry for the bother See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Amazon S3 boto - how to delete folder?

I created a folder in s3 named "test" and I pushed "test_1.jpg", "test_2.jpg" into "test". How can I use boto to delete folder "test"? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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