Recent questions tagged Python

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python - What's the reverse of shlex.split?

How can I reverse the results of a shlex.split? That is, how can I obtain a quoted string that ... made corresponding feature requests 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 - Melt the Upper Triangular Matrix of a Pandas Dataframe

Given a square pandas DataFrame of the following form: a b c a 1 .5 .3 b .5 1 .4 c .3 .4 ... you in advance for your consideration and response. 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 does scikitlearn says F1 score is ill-defined with FN bigger than 0?

I run a python program that calls sklearn.metrics's methods to calculate precision and F1 score. Here is the ... of F1 used by Scikilearn? 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 - 2d array of zeros

There is no array type in python, but to emulate it we can use lists. I want to have 2d array-like ... by means of speed and readability? 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 - Extract all keys from a list of dictionaries

I'm trying to get a list of all keys in a list of dictionaries in order to fill out the fieldnames argument for ... "age", "height", "weight"] 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 - adding dummy columns to the original dataframe

I have a dataframe looks like this: ????????????JOINED_CO GENDER ???EXEC_FULLNAME ?GVKEY ?YEAR ?CONAME ?BECAMECEO ... me with it, thanks a lot! 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 - Temporary failure in name resolution [Errno -3] with Docker

I'm following the docker tutorial and am on the part where I have to build the app using: docker build -t ... solving it. Thanks 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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python - ImportError: No module named mysql.connector using Python2

I have two files. The first one has the connection and the getting of data. I import mysql.connector. This ... connector 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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python - Individual alpha values in scatter plot

I'm wondering if it is possible to have individual alpha values for each point to be plotted using the scatter ... seem like a good 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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python - Using Basic HTTP access authentication in Django testing framework

For some of my Django views I've created a decorator that performs Basic HTTP access authentication. However, ... somebody finds this useful. See Question&Answers more detail:os...

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

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285 views

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python - pandas : update value if condition in 3 columns are met

I have a dataframe like this: In[1]: df Out[1]: A B C D 1 blue red square NaN 2 orange yellow ... yellow circle NaN 3 black grey circle NaN 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 - Using IntellijIdea within an existing virtualenv

I want to use Intellij Idea within my existing python django project which was built within a virtual ... of the 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 - Can I use Django F() objects with string concatenation?

I want to run a django update through the ORM that looks something like this: MyModel.objects.filter(**kwargs) ... this without writing raw SQL? See Question&Answers more detail:os...

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

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149 views

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python - Read data from pyodbc to pandas

I am querying a SQL database and I want to use pandas to process the data. However, I am not sure how to move ... Decimal('13278814.52'), 'B') 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 - Populating django field with pre_save()?

class TodoList(models.Model): title = models.CharField(maxlength=100) slug = models.SlugField(maxlength=100) def save( ... to do this? 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 - How to iterate over the first n elements of a list?

Say I've got a list and I want to iterate over the first n of them. What's the best way to write this in Python? 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 pyproject.toml file for?

Background I was about to try Python package downloaded from GitHub, and realized that it did not have a setup. ... .toml in an editable state? 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 - Drop multiple columns in pandas

I am trying to drop multiple columns (column 2 and 70 in my data set, indexed as 1 and 69 respectively) by ... to the first code snippet above? See Question&Answers more detail:os...

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

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283 views

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python - Is there a way to copy only the structure (not the data) of a Pandas DataFrame?

I received a DataFrame from somewhere and want to create another DataFrame with the same number and names of columns ... way of doing 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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python - Python3.6 AttributeError: module 'asyncio' has no attribute 'run'

I tried to read https://hackernoon.com/asynchronous-python-45df84b82434. It's about asynchronous python and I tried ... 6/asyncio/__init__.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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193 views

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python - Why is any (True for ... if cond) much faster than any (cond for ...)?

Two similar ways to check whether a list contains an odd number: any(x % 2 for x in a) any(True for x ... in times), expression) Try it online! See Question&Answers more detail:os...

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

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314 views

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python - Adding docstrings to namedtuples?

Is it possible to add a documentation string to a namedtuple in an easy manner? I tried from collections import ... do in some other 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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python - Check if argparse optional argument is set or not

I would like to check whether an optional argparse argument has been set by the user or not. Can I safely check ... value was set by the user. 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 - iphone push notifications passphrase issue (pyAPns)

I'm trying to implement push notifications for iphone based on PyAPNs When I run it on local but it blocks and ... ): print "fail: "+fail_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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python - sqlalchemy generic foreign key (like in django ORM)

Does sqlalchemy have something like django's GenericForeignKey? And is it right to use generic foreign fields. My ... of both ways? 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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191 views

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python - Suppress code in NBConvert? IPython

I have figured out how to suppress large code blocks from showing up in final NB convert (PDF) output. ... separately for some strange reason. See Question&Answers more detail:os...

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

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148 views

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python - Restore subset of variables in Tensorflow

I am training a Generative Adversarial Network (GAN) in tensorflow, where basically we have two different networks each ... I have that error. See Question&Answers more detail:os...

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

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140 views

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python - Tensorflow: How to modify the value in tensor

Since I need to write some preprocesses for the data before using Tensorflow to train models, some modifications on the tensor ... [ 3.1 4.2]] See Question&Answers more detail:os...

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

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