Recent questions tagged Python

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python - HowTo? CURRENT_TIMESTAMP AT TIME ZONE 'UTC'

How would I amend my calls to sqlalchemy.func.current_timestamp() with something that generates CURRENT_TIMESTAMP AT TIME ZONE 'UTC' See Question&Answers more detail:os...

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

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276 views

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python - Compute hash of only the core image data (excluding metadata) for an image

I'm writing a script to calculate the MD5 sum of an image excluding the EXIF tag. In order to do this accurately, ... videos MOV, AVI, and MPG. 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 - Lazy loading of class attributes

Class Foo has a bar, and it is not loaded until it is accessed. Further accesses to bar should incur no ... on all subsequent accesses... 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 Display Dataframe next to Plot in Jupyter Notebook

I understand how to display two plots next to each other (horizontally) in Jupyter Notebook, but I don't ... this? Thanks for your thoughts! 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 force scrapy to crawl duplicate url?

I am learning Scrapy a web crawling framework. by default it does not crawl duplicate urls or urls which scrapy ... of what I am looking 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 - Heroku Sporadic High Response Time

This is very specific, but I will try to be brief: We are running a Django app on Heroku. Three servers: ... nearly every SO or Google link. 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 - What is the difference between resize and reshape when using arrays in NumPy?

I have just started using NumPy. What is the difference between resize and reshape for arrays? 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 - CX_Oracle - import data from Oracle to Pandas dataframe

Hy, I'm new in python and I want import some data from a Oracle Database to python (pandas dataframe) using ... What did I do wrong? 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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python - Splitting one csv into multiple files

I have a csv file of about 5000 rows in python i want to split it into five files. I wrote a code for ... split one files into five csv files? 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 get the Tkinter Label text?

Im making a list of addresses that the user will select from, and the address text will be returned. I need to ... the right widget to be using? See Question&Answers more detail:os...

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

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360 views

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python multiprocessing - _multiprocessing.SemLock is not implemented when running on AWS Lambda

I have a short code that uses the multiprocessing package and works fine on my local machine. When I ... I run multiprocessing on Lambda? 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 secure own backend API which serves only my frontend?

I'm setting up a webapp with a frontend and a backend that communicates with the frontend soley through RESTful ... much information on 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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380 views

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python - How to add items to a QComboBox in PyQt/PySide

I need some help adding some items to a QComboBox. So I have two comboboxes, and one populates the other ... when the first combobox changes. See Question&Answers more detail:os...

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

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241 views

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python - How to download and write a file from Github using Requests

Lets say there's a file that lives at the github repo: https://github.com/someguy/brilliant/blob/master/somefile. ... . 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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414 views

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python - How do I use os.scandir() to return DirEntry objects recursively on a directory tree?

Python 3.5's os.scandir(path) function returns lightweight DirEntry objects that are very helpful with information ... beneath the given path? See Question&Answers more detail:os...

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

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435 views

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python - predict_proba for a cross-validated model

I would like to predict the probability from Logistic Regression model with cross-validation. I know you can ... = logreg.predict_proba(Xtest) 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 - custom dict that allows delete during iteration

UPDATED based on Lennart Regebro's answer Suppose you iterate through a dictionary, and sometimes need to delete ... very small code changes. 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 - Why does keras model predict slower after compile?

In theory, the prediction should be constant as the weights have a fixed size. How do I get my speed ... -after-compile.ipynb?flush_cache=true See Question&Answers more detail:os...

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

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137 views

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python - eval to import a module

I can't import a module using the eval() function. So, I have a function where if I do import vfs_tests as v ... a syntax error. Why is this so? See Question&Answers more detail:os...

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

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221 views

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python - Combine duplicated columns within a DataFrame

If I have a dataframe that has columns that include the same name, is there a way to combine the columns that ... the column name is the same? See Question&Answers more detail:os...

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

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470 views

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python - SQLAlchemy: filter by membership in at least one many-to-many related table

Using SQLAlchemy 0.7.1 and a MySQL 5.1 database, I've got a many-to-many relationship set up as ... of SELECT statement this would require. See Question&Answers more detail:os...

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

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515 views

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python - Beautiful Soup if Class "Contains" or Regex?

If my class names are constantly different say for example: listing-col-line-3-11 dpt 41 listing-col-block-1-22 ... seem to be doing the trick. See Question&Answers more detail:os...

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

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262 views

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python - Get all HTML tags with Beautiful Soup

I am trying to get a list of all html tags from beautiful soup. I see find all but I have to know the ... regex, but am trying to learn BS4 See Question&Answers more detail:os...

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

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220 views

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python - Pandas - find first non-null value in column

If I have a series that has either NULL or some non-null value. How can I find the 1st row where the ... same datatype in that series. 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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python - Compare string with all values in list

I am trying to fumble through python, and learn the best way to do things. I have a string where I am doing a ... a match to any value in d? See Question&Answers more detail:os...

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

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139 views

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python - How can I select only one column using SQLAlchemy?

I want to select (and return) one field only from my database with a "where clause". The code is: from ... Is "load_only" the correct option? See Question&Answers more detail:os...

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

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250 views

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python - How do you create a legend for a contour plot in matplotlib?

I can't seem to find the answer anywhere! I found a discussion here, but trying this I get a TypeError: ... 'm looking for something like 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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133 views

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python - How to create a class instance without calling initializer?

Is there any way to avoid calling __init__ on a class while initializing it, such as from a class method? I ... = tuple(self.__simple()) See Question&Answers more detail:os...

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

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