Recent questions tagged python

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python - Django: Using Annotate, Count and Distinct on a Queryset

Here's my database query: results = Attachments.objects.filter(currency='current').annotate(num_attachments=Count(' ... s going on here? 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 a wrapper_descriptor, and why is Foo.__init__() one in this case?

import inspect class Foo(object): pass if __name__ == '__main__': print type(Foo.__init__) print inspect. ... the class dict at all? 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 a mapping object, according to dict type?

The documentation lists 3 ways for creating a dict instance: class dict(**kwarg) class dict(mapping, **kwarg) ... for dict(mapping) to 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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190 views

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python - Split by a word (case insensitive)

If I want to take "hi, my name is foo bar" and split it on "foo", and have that split be case insensitive (split ... ['hI MY NAME iS ', ' bar'] 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 - XML Declaration standalone="yes" lxml

I have an xml I am parsing, making some changes and saving out to a new file. It has the declaration <?xml ... = True, encoding='UTF-8')) 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 - create_string_buffer throwing error TypeError: str/bytes expected instead of str instance

I am trying this simple ctypes example and getting the error mentioned >>> from ctypes import create_string_buffer >>> ... do stuff return c; } 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 - Comparing two dictionaries with numpy matrices as values

I want to assert that two Python dictionaries are equal (that means: equal amount of keys, and ... Python Comparing/combining two dictionaries 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 - Strict comparison

In javascript, there are strict comparison operators op1 === op2 and op1 !== op2 that will compare both type and value. ... (op1)) or op1 != op2 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 - Error: gunicorn: Failed to find application object 'app' in 'app'

Here's my code: app.py from flask_graphql import GraphQLView from app.infrastructure.graphql import schema from app. ... 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 - Why 'python3 -m venv myenv' installs older version of pip into myenv than any version of pip I can find anywhere on the system?

This is not causing me any problem that I can't solve by activating the virtual environment and running pip ... put into a virtual environment? 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 - Create a 2D list out of 1D list

I am a bit new to Python and I want to convert a 1D list to a 2D list, given the width and length of this ... =2, length=2 out of the list? 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 - numpy merge sorted array to an new array?

Is there any way we can do something like merge in mergesort using numpy function? some function like merge: a ... large data thanks to numpy See Question&Answers more detail:os...

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

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181 views

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python - How do I use Psycopg2's LoggingConnection?

I'd like to log the queries that psycopg2 is making, but the psycopg2 documentation doesn't really specify how ... most 2 arguments (5 given) See Question&Answers more detail:os...

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

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280 views

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python - MongoDB using an OR clause in mongoengine

I'm using python's mongoengine to query MongoDB, and have loved it for the most part, but I'm having ... benefit of (django) paginated results. See Question&Answers more detail:os...

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

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222 views

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python - How to find the index of the nth time an item appears in a list?

Given: x = ['w', 'e', 's', 's', 's', 'z','z', 's'] Each occurrence of s appears at the following ... . How do I get the index of the 4th s? See Question&Answers more detail:os...

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

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525 views

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python - ModuleNotFoundError - No module named 'main' when attempting to start service

Context: I created a Django application using Python 3.7. I am (attempting) to use the 2nd generation Google App ... problem out to no avail. See Question&Answers more detail:os...

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

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619 views

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python - Why does from scipy import spatial work, while scipy.spatial doesn't work after import scipy?

I would like to use scipy.spatial.distance.cosine in my code. I can import the spatial submodule if I do ... is wrong with the second approach? See Question&Answers more detail:os...

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

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413 views

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python - How to insert NULL value in SQLAlchemy?

I've a Table with the following column: Column('type', String(128)) How do I set this column to NULL when inserting ... don't know how to do 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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451 views

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python - What is the correct way to override the __dir__ method?

This question is meant to be more about __dir__ than about numpy. I have a subclass of numpy.recarray (in ... to begin with? mere oversight? See Question&Answers more detail:os...

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

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286 views

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python - How to split a sequence according to a predicate?

I very often run into the need to split a sequence into the two subsequences of elements that satisfy and don't satisfy a ... 5', '8', '11')] See Question&Answers more detail:os...

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

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199 views

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python - How do I exchange keys with values in a dictionary?

I receive a dictionary as input, and would like to to return a dictionary whose keys will be the input's ... neat Pythonic way to achieve 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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427 views

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python - Plotting multiple scatter plots pandas

I think there are many questions on plotting multiple graphs but not specifically for this case as shown below. The pandas ... : 'a' and 'c' See Question&Answers more detail:os...

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

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400 views

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python - How to iterate over rows in a DataFrame in Pandas

I have a DataFrame from Pandas: import pandas as pd inp = [{'c1':10, 'c2':100}, {'c1':11,'c2':110}, { ... object is and how I can work with 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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401 views

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python - Create list can only concatenate str (not "int") to str

I would to like to create a list programmatically based on following variables: a = 'a' b = 'b' c = 1 d ... concatenate str (not "int") to str See Question&Answers more detail:os...

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

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493 views

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python 3.x - How to get discord.py bot to show different stats for every player?

So, I tried to make a currency bot a while back, but it ended up that everyone in the server shared the ... balance? Help would be 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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467 views

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python - How to create a 2D binary array with 1's forming a "diamond" shape

I need to create a function that results in a diamond shape when given a side length. The diamond array should ... it should return [[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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725 views

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python 3.x - How to install PYODBC in Databricks

I have to install pyodbc module in Databricks. I have tried using this command (pip install pyodbc) but it is ... to below error. Error message 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 - Tensorflow runs out of memory while computing: how to find memory leaks?

I'm iteratively deepdreaming images in a directory using the Google's TensorFlow DeepDream implementation (https:// ... GeForce GTX 980 Ti. See Question&Answers more detail:os...

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

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