Recent questions tagged Python

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python - sqlalchemy dynamic schema on entity at runtime

I'm using SQL Alchemy and have some schema's that are account specific. The name of the schema is derived using ... do have a PK mapped. Thanks 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 - Matplotlib: draw a selection area in the shape of a rectangle with the mouse

I want to be able to draw a selection area on a matplotlib plot with a mouse event. I didn't find information on ... x0,self.x1,self.y0,self.y1] 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 use a Pydantic model with Form data in FastAPI?

I am trying to submit data from HTML forms and validate it with a Pydantic model. Using this code from fastapi ... . What am I doing wrong? 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-admin.py startproject mysite not working well on windows 7

I'm learning django and I did successfully start a site on Windows XP by following the tutorial. However, on ... more tricks for windows 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 - multiple if else conditions in pandas dataframe and derive multiple columns

I have a dataframe like below. import pandas as pd import numpy as np raw_data = {'student':['A','B','C','D', ... ['height'] > 8): return np.nan 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 - Associate "external' class model with flask sqlalchemy

We use a central class model for a wide variety of python modules. This model is defined using SQLAlchemy. ... be required by flask-security. 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 compute all second derivatives (only the diagonal of the Hessian matrix) in Tensorflow?

I have a loss value/function and I would like to compute all the second derivatives with respect to a tensor f ( ... from a slice of a tensor. 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 convert strings numbers to integers in a list?

I have a list say: ['batting average', '306', 'ERA', '1710'] How can I convert the intended numbers ... strings? Thank you for the help. 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 - Find the oldest file (recursively) in a directory

I'm writing a Python backup script and I need to find the oldest file in a directory (and its sub- ... files until that condition is met. 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 - Detect centre and angle of rectangles in an image using Opencv

I have an image as below : I need to find out the number of rectangles,centre of each rectangle and the measure the ... /M['m00']) print cx,cy 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 - Overlaying the numeric value of median/variance in boxplots

When using box plots in Python, is there any way to automatically/easily overlay the value of the median & variance ... std) on each box plot. 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 - Hide the console of an .exe file created with PyInstaller

I want to make my program executable. I used TkInter to write the GUI, and I read somewhere that you have to ... console also in the .exe file? 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 - Identifying consecutive occurrences of a value in a column of a pandas DataFrame

I have a df like so: Count 1 0 1 1 0 0 1 1 1 0 and I want to return a 1 in a new column if ... occurrences, I just use 2 in the example here. 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 package a coroutine as normal function in event loop?

I am using asyncio for a network framework. In below code(low_level is our low level function, main block is our ... it as a normal function? 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 - Creating a popup message box with an Entry field

I want to create a popup message box which prompts user to enter an input. I have this method inside a ... in Python which accepts user input? See Question&Answers more detail:os...

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

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706 views

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python - Multiprocessing Queue maxsize limit is 32767

I'm trying to write a Python 2.6 (OSX) program using multiprocessing, and I want to populate a Queue with ... there a workaround for this issue? See Question&Answers more detail:os...

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

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135 views

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python - multiprocessing GUI schemas to combat the "Not Responding" blocking

What are the best ways to create a multiprocessing/ GUI coding system? I would like to create a place for the internet ... I have learned a decent amount from this post, which allo...

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

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534 views

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python - Scrapy - how to identify already scraped urls

Im using scrapy to crawl a news website on a daily basis. How do i restrict scrapy from scraping ... or examples on SgmlLinkExtractor. See Question&Answers more detail:os...

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

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127 views

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python - Passing data from javascript into Flask

I know how to pass data with a jinja template from python into javascript, but I want to pass a javascript ... the page. Is that possible? See Question&Answers more detail:os...

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

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485 views

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python - Fastest way to perform complex search on pandas dataframe

I am trying to figure out the fastest way to perform search and sort on a pandas dataframe. Below are before ... ' would still be ABC-XYZ See Question&Answers more detail:os...

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

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441 views

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python - how to get the name of column with maximum value in pyspark dataframe

How do we get the name of the column pyspark dataframe ? Alice Eleonora Mike Helen MAX 0 2 7 8 6 Mike 1 11 ... the max values, i need the name See Question&Answers more detail:os...

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

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737 views

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python - numpy histogram cumulative density does not sum to 1

Taking a tip from another thread (@EnricoGiampieri's answer to cumulative distribution plots python), I wrote: # ... me some guidance? Thanks! 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 - argparse subcommands with nested namespaces

Does argparse provide built-in facilities for having it parse groups or parsers into their own namespaces? I ... groups into namespaced fields? 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 remove or hide x-axis labels from a seaborn / matplotlib plot

I have a boxplot and need to remove the x-axis ('user_type' and 'member_gender') label. How do I do this given ... =Male, 1=Female, 2=Other)') See Question&Answers more detail:os...

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

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250 views

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python - Getting a bounded polygon coordinates from Voronoi cells

I have points (e.g., lat, lon pairs of cell tower locations) and I need to get the polygon of the ... , but rather within a bounding box. 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 use paho mqtt client in django?

I am writing a django application which should act as MQTT publisher and as a subscriber. Where should I start the paho ... it be in wsgi.py ? See Question&Answers more detail:os...

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

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377 views

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python - transform pandas pivot table to regular dataframe

How can I convert a pandas pivot table to a regular dataframe ? For example: amount categories A B C date deposit ... 00 4659384.47 0.00 0.00 See Question&Answers more detail:os...

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

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325 views

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python - uploading a plot from memory to s3 using matplotlib and boto

This is my working script that generates a plot, saves it locally to disk, uploads to S3 and deletes the ... suggestions how to achieve that? See Question&Answers more detail:os...

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

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