Recent questions tagged Python

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python - Django ManyToMany through with multiple databases

TLTR: Django does not include database names in SQL queries, can I somehow force it to do this or is there ... is there any workaround for 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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python - StopIteration: generator_output = next(output_generator)

I have the following code which I rewrite to work on a large scale dataset. I am using Python generator ... error why StopIteration is raised. 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 - Playing a Lot of Sounds at Once

I am attempting to create a program in python that plays a particular harpsichord note when a certain key is pressed. ... I really don't care. 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 - pandas.DataFrame corrwith() method

I recently start working with pandas. Can anyone explain me difference in behaviour of function .corrwith() with ... get such strange output? 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 - Merge dataframes on nearest datetime / timestamp

I have two data frames as follows: A = pd.DataFrame({"ID":["A", "A", "C" ,"B", "B"], " ... the nearest time stamp >= the series of timestamps 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 - Idiomatic way to unpack variable length list of maximum size n

I'm reading a file and unpacking each line like this: for line in filter(fh): a, b, c, d = line.split() ... do this? I'm using 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 - Mixing file.readline() and file.next()

I noticed some strange behavior today playing around with next() and readline(). It seems that both functions produce ... 2.7.6 for Windows 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 print formatted string in Python3?

Hey I have a question concerning this print ("So, you're %r old, %r tall and %r heavy.") % ( age, height, ... 4 do anyone know how to fix 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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python - pip error: unrecognized command line option ‘-fstack-protector-strong’

When I sudo pip install pyquery, sudo pip install lxml, and sudo pip install cython, I get very similar output ... please help me out? 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 - ImportError: no module named py2exe

I get this error when I try to use one of the py2exe samples with py2exe. File "setup.py", line 22, ... afterwards. Could that be the problem? 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 - Pandas: TypeError: '>' not supported between instances of 'int' and 'str' when selecting on date column

I have a Pandas DataFrame with a column with TimeStamps. I can select date ranges from this column. But after I make ... and how do I avoid 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 - How to calculate relative path between 2 directory path?

I have 2 directory: subdir1 = live/events/livepkgr/events/_definst_/ subdir2 = live/streams/livepkgr/streams ... /livepkgr/streams/_definst_/ 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 - Disable pylint message for a given module or directory

Is there a way to disable Pylint's duplicate-code message just for test files? All of the tests in our project ... 've already fallen back on). See Question&Answers more detail:os...

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

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422 views

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python - Why are Exceptions iterable?

I have been bitten by something unexpected recently. I wanted to make something like that: try : thing.merge( ... 1 Does anybody know why? 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 cursor error during yield_per

I am getting the following error: Traceback (most recent call last): main() for item in session.query(Item).yield_per ... ): foo(item) Any idea? 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 - Google Appengine sending emails: [Error] unauthorized sender

I'm trying to use google app engine's mail service on my site. It's showing some error whenever I visit ... Thanks in advance 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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683 views

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python - SQL Alchemy ResultProxy.rowcount should not be zero

Does anyone know how to get the row count from an SQL Alchemy query ResultProxy object without looping through the result set? ... '] (1,) (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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790 views

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python - non Invertible of a ARIMA model

I am trying to write a code to generate a series of arima model and compare different models.The code is as ... and go on with other combination See Question&Answers more detail:os...

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

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392 views

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python - Access denied using Py2exe

I'm using Py2exe to create an executable as a windows service. When I run the script I get this error: File "C: ... t work. Any idea? Thank you. See Question&Answers more detail:os...

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

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564 views

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python - Disable abbreviation in argparse

argparse uses per default abbreviation in unambiguous cases. I don't want abbreviation and I'd like to disable ... already has been processed. See Question&Answers more detail:os...

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

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486 views

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python 3.x - Extract title with BeautifulSoup

I have this from urllib import request url = "http://www.bbc.co.uk/news/election-us-2016-35791008" ... 'find_all' Please any suggestions See Question&Answers more detail:os...

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

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520 views

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python - Setting multiple object attributes at once

Is there a way to set multiple attributes of the same object on a single line, similarly to the way one ... someObject.b=2 someObject.c=3 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 - Unable to import distutils.dir_util on Windows

I'm trying to using distutils.dir_util on Windows 7 64bit. As far as I can glean from various googling, I may ... needed or how it even works? 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 - MQTT - Is there a way to check if the client is still connected

Is there a way to check if the client is still connected to the MQTT broker? Something like if client. ... it will start receiving again. See Question&Answers more detail:os...

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

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339 views

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python - RuntimeError: module compiled against API version 0xc but this version of numpy is 0xb

I'm trying to learn Machine Learning, but I cannot resolve below error. [My environment] Mac High Sierra 10.13 ... pip3 install numpy -I 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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415 views

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python - Get a layout's widgets in PyQT

I have a QVBoxLayout that I've added a few widgets to, via addWidget(). I need to now delete those widgets, ... and error with the API docs. 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 - OpenCV Error: (-215:Assertion failed) VScn::contains(scn) && VDcn::contains(dcn) && VDepth::contains(depth) in function 'CvtHelper'

Traceback (most recent call last): File "demo.py", line 132, in `result = find_strawberry( ... taken from: llSourcell/Object_Detection_demo_LIVE See Question&Answers more detail:os...

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

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612 views

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python - How to write data from two lists into columns in a csv?

I want to write data that I have to create a histogram into a csv file. I have my 'bins' list and ... column and frequency in the second column See Question&Answers more detail:os...

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

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