Recent questions tagged Python

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python - main loop 'builtin_function_or_method' object is not iterable

I get this error "main loop 'builtin_function_or_method' object is not iterable" when I run the code ... stocksToPull: pullData(eachStock) See Question&Answers more detail:os...

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

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485 views

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python - Why is collections.Counter much slower than ''.count?

I have a simple task: To count how many times every letter occurs in a string. I've used a ... 0.07911698750407936 27.462430656767047 >>> See Question&Answers more detail:os...

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

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931 views

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python - Deleting form from django formset

I am trying to implement a django formset (where user may dynamically add/remove forms from formset). I use JS to ... ': block? Is it possible? See Question&Answers more detail:os...

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

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585 views

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python - Regex Matching - A letter not preceded by another letter

What could be regex which match anystring followed by daily but it must not match daily preceded by m? For ... mdaily which is not intended See Question&Answers more detail:os...

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

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669 views

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python - C++: push_back in std::vector while iterating it

Following code snippet provides a very weird output. I was expecting an overflow( Python gives a MemoryError) #include ... in the loop body. See Question&Answers more detail:os...

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

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565 views

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python - Split train data to train and validation by using tensorflow_datasets.load (TF 2.1)

I'm trying to run the following Colab project, but when I want to split the training data into validation and ... How I can fix this error? See Question&Answers more detail:os...

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

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794 views

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python - "Apps aren't loaded yet" and "django.core.exceptions.ImproperlyConfigured" in Django?

This is the directory structure of my Django project. When I am running python code of importing a model:from scraping ... is not a Django app. See Question&Answers more detail:os...

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

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1.6k views

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python - OpenCV 4.0.0 SystemError: <class 'cv2.CascadeClassifier'> returned a result with an error set

Hello I am trying to create a facial recognition program but I have a peculiar error: here is my code: gray = cv2 ... .__version__ I get '4.0.0' See Question&Answers more detail:os...

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

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610 views

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python - cannot unpack non-iterable numpy.float64 object python3 opencv

I am getting this error and cant understand why the issue is appearing. Below will be the code ... = display_lines(cropped_image,averaged_lines) See Question&Answers more detail:os...

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

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582 views

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python - Pandas: add crosstab totals

How can I add to my crosstab an additional row and an additional column for the totals? df = pd.DataFrame({"A": ... ct.1 but this does not 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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536 views

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python - sorting numpy structured and record arrays is very slow

it looks like sorting numpy structured and record arrays by a single column is much slower than doing a sort on a ... this 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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758 views

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python - why Cython compiler generates a so with suffix 'cpython-35m-x86_64-linux-gnu.so'

#setup.py from distutils.core import setup from distutils.extension import Extension from Cython.Distutils import build_ext ... .so? 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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452 views

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python - In SQLAlchemy, why is my load_only not filtering any columns that I have specified?

Basically I have created a database, in normal full query, this is the code I've used and the response ... doing something wrong? 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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409 views

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python - How to make Mypy deal with subclasses in functions as expected

I have the following code: from typing import Callable MyCallable = Callable[[object], int] MyCallableSubclass = Callable[[ ... How do I fix 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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551 views

1 answer

python - Submitting a form with mechanize (TypeError: ListControl, must set a sequence)

I'm trying to submit a form with mechanize but have run into an error (TypeError: ListControl, must set a ... for the form options. 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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553 views

1 answer

python - Overwriting/clearing previous console line

My problem is, that I want to be able to overwrite/clear previous printed line in python console. This question has ... .flush() does not help. See Question&Answers more detail:os...

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

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558 views

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python - rendering forms with flask + wtform

code in question: from flask import Blueprint, render_template, abort from flask.ext.wtf import Form import os from ... /field with the wtform? See Question&Answers more detail:os...

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

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507 views

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python - Why doesn't matplotlib use the .ttf font that I provide?

I'm trying to use a TTF font in matplotlib; the .ttf file is downloaded and lives locally on my machine. I've ... =prop, size=40) fig.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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803 views

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python - ValueError: too many values to unpack - Is it possible to ignore one value?

The following line returns an error: self.m, self.userCodeToUserNameList, self.itemsList, self.userToKeyHash, self. ... ignore the last value? See Question&Answers more detail:os...

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

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622 views

1 answer

python - Exclude module docstring in autodoc

I'm trying to use autodoc in Sphinx to print out the docstrings of every functions in a specific module but ... (with the lovely docopt). See Question&Answers more detail:os...

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

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613 views

1 answer

python - List EC2 volumes in Boto

I want to list all volumes attached to my EC2 instance. I can list volumes with my code: conn = ... like: vol-35b0b5fa vol-6cbbbea3 See Question&Answers more detail:os...

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

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995 views

1 answer

python - SQLAlchemy: How to Delete with join

I have trouble doing such thing bottom with SQLAlchemy: DELETE a FROM a INNER JOIN b ON b.`aId` = a.`Id` ... to solve the problem here? 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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862 views

1 answer

python - yfinance json.decoder.JSONDecodeError

It had been working all the time before today. I don't know why it doesn't work today. import yfinance as yf df = ... : line 1 column 1 (char 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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969 views

1 answer

python - No matching distribution found for Django==2.2

I am deploying a django app on a digital ocean droplet server that I developed using Django version 2.0. ... $ sudo apt install python3-django See Question&Answers more detail:os...

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

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451 views

1 answer

python - Replace unique values of pandas data-frame

Hi I'm new to python and pandas. I have extracted the unique values of one of the column using pandas. Now ... have more than 300 unique values. See Question&Answers more detail:os...

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

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764 views

1 answer

python - Getting "OSError: [WinError 6] The handle is invalid" in VideoFileClip function

I am creating a program using python by importing moviepy library, but getting following error: from moviepy.editor ... me know a workaround. See Question&Answers more detail:os...

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

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612 views

1 answer

python 3.x - hangs on open url with urllib (python3)

I try to open url with python3: import urllib.request fp = urllib.request.urlopen("http://lebed.com/") mybytes = ... problem and how to fix 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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548 views

1 answer

python - Element wise concatenate multiple lists (list of list of strings)

i have a list of list of strings as below lst = [['a','b','c'],['@','$','#'],['1','2','3']] ... map(str.__add__,(x for x in list)) please help. See Question&Answers more detail:os...

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

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