Recent questions tagged Python

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python - AttributeError: module 'cv2.cv2' has no attribute 'xfeatures2d' [Opencv 3.4.3]

I have opencv 3.4.3 installed (using pip3 install opencv-python and pip3 install opencv-python-contrib) When I run ... by opencv 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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python - How to format in numpy savetxt such that zeros are saved only as "0"

I am saving a numpy sparse array (densed) into a csv. The result is I have a 3GB csv. The problem is 95% ... ', delimiter = ',') Thanks Regards 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 - Add items in a list until their sum exceeds a threshold

From a list of values I want to create a new list of values until they add up a value. I am new with Python but I believe ... : s += L[i] i += 1 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 watchdog modified and created duplicate events

Running on Ubuntu, every time i create a file i get a modified and a created event. Is this by design or ... i safely ignore the created event? 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 - A recipe to group/aggregate data?

I have some data stored in a list that I would like to group based on a value. For example, if my data is ... there a recipe that can help me? 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 - 3D surface not transparent inspite of setting alpha

I am trying to create a 3D surface with transparency. When I try the following code below, I expect to ... (face1) ax.add_collection3d(face2) 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 - Checking if an array is element of a list of arrays

I have 13 python NumPy arrays: obj_1=np.array([784,785,786,787,788,789,790,791,792]) obj_2=np.array([ ... anyone have an idea why this happens? 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 - Overlap between mask and fired beams in Pygame [AI car model vision]

I try to implement beam collision detection with a predefined track mask in Pygame. My final goal is to give ... approach to solve this problem? 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 - Using scipy.integrate.complex_ode instead of scipy.integrate.ode

I am trying to use complex_ode method instead of ode method in scipy.integrate. The help page for complex_ode does ... what am I doing 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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python - Cumulative operations on dtype objects

I am trying to figure out how I can apply cumulative functions to objects. For numbers there are several ... result and the current element. 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 do you scroll a GridLayout inside Kivy ScrollView?

At the moment this is my kv code that is not scrollable: BoxLayout: id: bl orientation: 'vertical' padding: ... 's not working. Any suggestion? 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 validate date format

Is there any nice way to validate that all items in a dataframe's column have a valid date format? My ... Python world, any ideas 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 - Using Cython to wrap a c++ template to accept any numpy array

I'm trying to wrap a parallel sort written in c++ as a template, to use it with numpy arrays of any numeric ... be a better way to do 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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python - How to create a bag of words from a pandas dataframe

Here's my dataframe CATEGORY BRAND 0 Noodle Anak Mas 1 Noodle Anak Mas 2 Noodle Indomie 3 Noodle Indomie 4 Noodle ... I need every 1 word counts See Question&Answers more detail:os...

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

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567 views

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python - How to convert a datetime format to minutes - pandas

I have a data frame which has a column usage_duration (which is the difference of two another columns in ... ? Highly appreciate your support See Question&Answers more detail:os...

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

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680 views

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python - How to transpose rows to columns in Pandas?

I am writing the result of an SQL query into an Excel sheet and attempting to transpose rows into columns but cannot seem to ... .............. 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 - Psycopg2 using wildcard causes TypeError

Currently I am attempting to search a database to grab certain events. My query is as such SELECT * FROM ... can correct my noobishness ;) 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 round up a complex number?

How can I round up a complex number (e.g. 1.9999999999999998-2j) as 2-2j? When I tried using print ... complex doesn't define __round__ method 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 - Why do I get a warning when concatenating lists of mixed types in Pycharm?

In Pycharm, the following code produces a warning: from typing import List list1: List[int] = [1, 2, 3] ... two lists of mixed, hinted types? 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 prevent a race condition when multiple processes attempt to write to and then read from a file at the same time

I have the following code (simplified for clarity): import os import errno import imp lib_dir = os.path. ... (This solution seems suboptimal.) 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 - NameError: name 'hasattr' is not defined - Python3.6, Django1.11, Ubuntu16-17, Apache2.4, mod_wsgi

I've set up my Python/Django virtual environment, and mod_wsgi in daemon mode, and am pretty sure (done this ... line: '/usr/sbin/apache2' See Question&Answers more detail:os...

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

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675 views

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python - Encoding of headers in MIMEText

I'm using MIMEText to create an email from scratch in Python 3.2, and I have trouble creating messages with ... that the result is correct). 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 - Simultaneous .replace functionality

I have already converted user input of DNA code (A,T,G,C) into RNA code(A,U,G,C). This was fairly easy RNA_Code ... how to get this done?(3.3) See Question&Answers more detail:os...

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

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python - Import error: cannot import name 'opentype'

I'm trying to follow the instructions for utilizing Firebase in my py code running on Raspberry Pi 2 B+. ... I really appreciate your 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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704 views

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python - Numpy array element-wise division (1/x)

My question is very simple, suppose that I have an array like array = np.array([1, 2, 3, 4]) and I'd ... to do that. Does anyone have any idea? 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 - Django Forms: Foreign Key in Hidden Field

My form: class PlanForm(forms.ModelForm): owner = forms.ModelChoiceField(label="", queryset=Profile.objects.all(), ... try to validate the form? See Question&Answers more detail:os...

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

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1.4k views

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python - How to compress csv file into zip archive directly?

I am generating a number of csv files dynamically, using the following code: import csv fieldnames = ['foo1' ... compressed zip similar to gzip? 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 - ImportError: cannot import name MAXREPEAT with cx_Freeze

I'm running into an issue with cx_Freeze when running a frozen application (works fine unfrozen). When running the ... .7/sre_parse.pyc ... See Question&Answers more detail:os...

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

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