Recent questions tagged Python

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python - Dynamically exclude or include a field in Django REST framework serializer

I have a serializer in Django REST framework defined as follows: class QuestionSerializer(serializers.Serializer): id ... a given serializer. See Question&Answers more detail:os...

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

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224 views

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python - Slicing a dictionary by keys that start with a certain string

This is pretty simple but I'd love a pretty, pythonic way of doing it. Basically, given a dictionary, ... enough opportunities to use those). 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 check if a variable's type is primitive?

I don't know how to check if a variable is primitive. In Java it's like this: if var.isPrimitive(): 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 - Merge two DataFrames based on multiple keys in pandas

Does pandas (or another module) have any functions to support merge (or join) two tables based on multiple keys? For ... 0.13 2 2 333 0.33 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 - Count occurrences of False or True in a column in pandas

given patient_id test_result has_cancer 0 79452 Negative False 1 81667 Positive True 2 76297 Negative ... print(number_of_patients_with_cancer) See Question&Answers more detail:os...

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

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130 views

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python - How to downgrade tensorflow, multiple versions possible?

I have tensorflow 1.2.1 installed, and I need to downgrade it to version 1.1 to run a specific tutorial. What ... of tensorflow on the same OS? 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 - Pandas : compute mean or std (standard deviation) over entire dataframe

Here is my problem, I have a dataframe like this : Depr_1 Depr_2 Depr_3 S3 0 5 9 S2 4 11 8 S1 6 11 12 ... 1, unlike the numpy one where ddof=0. 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 - SyntaxError invalid token

I have a problem when I try to assign a value to a variable. The problem shows up when I try to put a ... it? What does token mean in Python? See Question&Answers more detail:os...

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

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361 views

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python - How to access Anaconda command prompt in Windows 10 (64-bit)

I had to install the 64-bit version of Anaconda with python 3.5 in Windows 10. I followed the default ... do to access the Anaconda prompt? 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 - pandas.read_csv from string or package data

I have some csv text data in a package which I want to read using read_csv. I was doing this by from pkgutil ... =0 but only 0 lines in 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 - Jupyter Notebook 500 : Internal Server Error

I want to learn how to use Jupyter Notebook. So far, I have managed to download and install it (using ... : No module named command.install See Question&Answers more detail:os...

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

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256 views

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python - Make @lru_cache ignore some of the function arguments

How can I make @functools.lru_cache decorator ignore some of the function arguments with regard to caching key ... consider query argument only. See Question&Answers more detail:os...

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

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749 views

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python - OSError: [Errno 8] Exec format error

I am having hard time parsing the arguments to subprocess.Popen. I am trying to execute a script on my Unix ... [Errno 8] Exec format error See Question&Answers more detail:os...

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

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472 views

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python - ImportError: No module named _io in ubuntu 14.04

I just fresh installed ubuntu 14.04LTS and i am trying to use pip but i am getting the following traceback: ... sudo apt-get install python-pip See Question&Answers more detail:os...

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

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383 views

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python - Why does pip freeze report some packages in a fresh virtualenv created with --no-site-packages?

When I create a fresh virtualenv, pip freeze shows that I have a couple of packages installed even though ... DISTRIB_DESCRIPTION="Ubuntu 11.04" See Question&Answers more detail:os...

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

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488 views

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python - Remove line through marker in matplotlib legend

I have a matplotlib plot generated with the following code: import matplotlib.pyplot as pyplot Fig, ax = pyplot.subplots ... I get rid of them? See Question&Answers more detail:os...

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

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700 views

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python - Use tqdm with concurrent.futures?

I have a multithreaded function that I would like a status bar for using tqdm. Is there an easy way to ... # wrap tqdr around this 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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221 views

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python - pip install PIL fails

I am trying to install the pip package PIL. However the install doesn't work throwing the following error. ... with the virtualenv-reqs 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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369 views

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python - pandas get the row-wise minimum value of two or more columns

How can I reference the minimum value of two dataframes as part of a pandas dataframe equation? I tried using the python ... 39 62 9 56 74 50 See Question&Answers more detail:os...

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

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319 views

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python - How to downgrade the installed version of 'pip' on windows?

On a windows 7 machine I have pip version 1.5.6 installed: pip 1.5.6 from C:UsersdietzPNCasENVlibsite-packages ... version 1.2.1 instead? See Question&Answers more detail:os...

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

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455 views

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python - How to annotate function that takes a tuple of variable length? (variadic tuple type annotation)

I have a function that takes a tuple of different lengths as an argument: from typing import Tuple def ... annotate this kind of 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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377 views

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python - json serialize a dictionary with tuples as key

Is there a way in Python to serialize a dictionary that is using a tuple as key: a={(1,2):'a'} simply using json ... key (1, 2) is not a string See Question&Answers more detail:os...

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

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1.2k views

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python - Celery with RabbitMQ: AttributeError: 'DisabledBackend' object has no attribute '_get_task_meta_for'

I'm running the First Steps with Celery Tutorial. We define the following task: from celery import Celery app = ... Why isn't this working? See Question&Answers more detail:os...

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

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567 views

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python - Boolean Series key will be reindexed to match DataFrame index

Here is how I encountered the error: df.loc[a_list][df.a_col.isnull()] The type of a_list is Int64Index， ... the result that it returned? See Question&Answers more detail:os...

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

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141 views

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python - Running custom Java class in PySpark

I'm trying to run a custom HDFS reader class in PySpark. This class is written in Java and I need to ... Can someone help with this? 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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371 views

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python firebase realtime listener

Hi there I'm new in python. I would like to implement the listener on my Firebase DB. When I change one or ... .get('003', None) print result See Question&Answers more detail:os...

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

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213 views

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python - URL routing conflicts for static files in Flask dev server

I want to define a url rule with three variable components, like: @app.route('/<var_1>/<var_2>/<var3> ... has more than two variable components. See Question&Answers more detail:os...

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

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217 views

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python - Write GeoDataFrame into SQL Database

I hope that my question is not ridiculous since, surprisingly, this question has apparently not really been asked yet ... Thanks for your 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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