Recent questions tagged Python

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python - Suppress "None" output as string in Jinja2

How do I persuade Jinja2 to not print "None" when the value is None? I have a number of entries in a ... passing it to Jinja2 for rendering? 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 - SQLAlchemy - subquery in a WHERE clause

I've just recently started using SQLAlchemy and am still having trouble wrapping my head around some of the concepts. ... on SQLAlchemy 0.6.6. See Question&Answers more detail:os...

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

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117 views

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python - Common folder/file structure in Flask app

I have just created a flask application and so far I have a router for my "Hello world!" template. I would ... Should models be in models.py? See Question&Answers more detail:os...

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

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213 views

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python - How do I update a Mongo document after inserting it?

Let's say I insert the document. post = { some dictionary } mongo_id = mycollection.insert(post) Now, let's ... = "abc" mycollection.save(post) See Question&Answers more detail:os...

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

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261 views

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python - Test if an attribute is present in a tag in BeautifulSoup

I would like to get all the <script> tags in a document and then process each one based on the presence ( ... (those without the for attribute). See Question&Answers more detail:os...

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

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195 views

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python - Getting random row through SQLAlchemy

How do I select one or more random rows from a table using SQLAlchemy? See Question&Answers more detail:os...

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

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154 views

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python - How do I install an old version of Django on virtualenv?

This may sound like a stupid question, since the very purpose of virtualenv is to this exactly: Installing some specific ... How do I 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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503 views

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python - Why does Popen.communicate() return b'hi ' instead of 'hi'?

Can someone explain why the result I want, "hi", is preceded with a letter 'b' and followed with a newline? I am ... if I run it with python 2.7 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 - Callback for celery apply_async

I use celery in my application to run periodic tasks. Let's see simple example below from myqueue import Queue ... it possible to do that? See Question&Answers more detail:os...

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

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120 views

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python - Django image resizing and convert before upload

I searched a lot on this subject but couldn't really find what I need. I'll explain my problem : On my ... point?). Thank you for 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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116 views

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python - Unit and functional testing a PySide-based application?

I'm building a PySide 1.1.0-based application, and have been looking for good examples to look at for unit and ... code that I should look at? See Question&Answers more detail:os...

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

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258 views

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python - Django uploads: Discard uploaded duplicates, use existing file (md5 based check)

I have a model with a FileField, which holds user uploaded files. Since I want to save space, I would like ... *kwargs) Any help is 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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206 views

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python - How to introspect django model fields?

I am trying to obtain class information on a field inside a model, when I only know name of the field and ... related field? Thanks a bunch! See Question&Answers more detail:os...

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

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379 views

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python - How do I get the weights of a layer in Keras?

I am using Windows 10, Python 3.5, and tensorflow 1.1.0. I have the following script: import tensorflow as tf ... I still can't make it 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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155 views

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python - How do I use cx_freeze?

I've created my setup.py file as instructed but I don't actually.. understand what to do next. Typing "python setup ... ", base = "Win32GUI")]) See Question&Answers more detail:os...

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

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328 views

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python - Scikit Learn TfidfVectorizer : How to get top n terms with highest tf-idf score

I am working on keyword extraction problem. Consider the very general case from sklearn.feature_extraction.text import ... highest tfidf score? See Question&Answers more detail:os...

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

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263 views

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python - pytz utc conversion

What is the right way to convert a naive time and a tzinfo into an UTC time? Say I have: d = datetime(2009, ... is - what's the right way? See Question&Answers more detail:os...

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

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343 views

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python - how to do a left,right and mid of a string in a pandas dataframe

in a pandas dataframe how can I apply a sort of excel left('state',2) to only take the first two letters. Ideally ... Du 4 2.9 Hamilton 2002 Ha See Question&Answers more detail:os...

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

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338 views

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python - Find dictionary items whose key matches a substring

I have a large dictionary constructed like so: programs['New York'] = 'some values...' programs['Port Authority ... to get larger over time. See Question&Answers more detail:os...

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

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216 views

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python - How to return custom JSON in Django REST Framework

I am trying to return custom json with get_queryset but always get 404 error in response. class TestViewSet(viewsets. ... What I am 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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839 views

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python - RuntimeError: There is no current event loop in thread in async + apscheduler

I have a async function and need to run in with apscheduller every N minutes. There is a python code below URL_LIST ... 3.6, APScheduler 3.3.1, See Question&Answers more detail:os...

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

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228 views

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python - Transform a Counter object into a Pandas DataFrame

I used Counter on a list to compute this variable: final = Counter(event_container) print final gives: Counter( ... final to a DataFrame? See Question&Answers more detail:os...

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

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357 views

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python - The easiest way for getting feature names after running SelectKBest in Scikit Learn

I would like to make supervised learning. Until now I know to do supervised learning to all features ... list(features_dataframe.columns.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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456 views

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python - Overriding urllib2.HTTPError or urllib.error.HTTPError and reading response HTML anyway

I receive a 'HTTP Error 500: Internal Server Error' response, but I still want to read the data inside ... exception is urllib.error.HTTPError. See Question&Answers more detail:os...

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

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236 views

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python - Elegant way to create empty pandas DataFrame with NaN of type float

I want to create a Pandas DataFrame filled with NaNs. During my research I found an answer: import pandas as pd ... to create the same result? See Question&Answers more detail:os...

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

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168 views

1 answer

python - Boto3/S3: Renaming an object using copy_object

I'm trying to rename a file in my s3 bucket using python boto3, I couldn't clearly understand the arguments. ... I need a solution using boto3. See Question&Answers more detail:os...

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

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383 views

1 answer

python - Pythonic way to convert a dictionary into namedtuple or another hashable dict-like?

I have a dictionary like: d = {'a': 1, 'b': 2, 'c': 3, 'd': 4} which I would like to convert ... that's now what I would use going forward. See Question&Answers more detail:os...

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

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131 views

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python - Installing Pip-3.2 on Cygwin

I have Python 3 installed on Cygwin. However, I am unable to install Python 3 packages via pip. Is there a 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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