Recent questions tagged Python

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python - Keras + tensorflow gives the error "no attribute 'control_flow_ops'"

I am trying to run keras for the first time. I installed the modules with: pip install keras --user pip ... get keras to run with tensorflow? See Question&Answers more detail:os...

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

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334 views

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python - Django GROUP BY field value

Surprising that I could not find a way to make a group by query. I have a query set qs and I am ... any feature to group results like 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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523 views

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python - Numpy error: Singular matrix

What does the error Numpy error: Matrix is singular mean specifically (when using the linalg.solve function)? I ... when this error occurs. 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 - Fastest way to left-cycle a numpy array (like pop, push for a queue)

With numpy arrays, I want to perform this operation: move x[1],...,x[n-1] to x[0],...,x[n-2] (left ... 0). Is there a fastest way 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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python - Can a Jupyter / IPython notebook take arguments in the URL?

Is it possible to write an Jupyter notebook such that parameters can be passed in via the URL of the ... Variable2 inside the Jupyter cell? 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 - Run all functions in class

I am trying to run all the functions in my class without typing them out individually. class Foo(object): def __init__( ... ) x.bar() x.foobar() 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: How to make apply on dataframe faster?

Consider this pandas example where I'm calculating column C by multiplying A with B and a float if a certain condition ... e.g. by using 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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818 views

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python - How to convert ArrayType to DenseVector in PySpark DataFrame?

I'm getting the following error trying to build a ML Pipeline: pyspark.sql.utils.IllegalArgumentException: 'requirement ... convert to an RDD? See Question&Answers more detail:os...

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

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659 views

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python - Can pyautogui be used to prevent windows screen lock?

I tried to use this script to prevent windows screen lock. The script works for moving the mouse, but it doesn't ... (-1) time.sleep (300) 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 - Get TCP Flags with Scapy

I'm parsing a PCAP file and I need to extract TCP flags (SYN, ACK, PSH, URG, ...). I'm using the ... extract it from packet['TCP'].flags value? See Question&Answers more detail:os...

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

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315 views

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python - Disable Exit (or [ X ]) in tkinter Window

I am posting this because I myself have struggled with finding a clear answer on this problem . . . In ... Hopefully, this has helped someone. See Question&Answers more detail:os...

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

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176 views

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python - Is there a good way to do this type of mining?

I am trying to find points that are closest in space in X and Y directions (sample dataset given at the end) and ... ,100 68,101 68,103 68,104 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 - pylint no member issue but code still works vscode

I have a very simple code here import torch l = torch.nn.Linear(2,5) v = torch.FloatTensor([1, 2 ... disable pylint for this specific instance? See Question&Answers more detail:os...

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

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440 views

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python - When reading huge HDF5 file with "pandas.read_hdf() ", why do I still get MemoryError even though I read in chunks by specifying chunksize?

Problem description: I use python pandas to read a few large CSV file and store it in HDF5 file, the ... process without noticeable CPU usage? See Question&Answers more detail:os...

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

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896 views

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python - sqlalchemy dynamic filtering

I'm trying to implement dynamic filtering using SQLAlchemy ORM. I was looking through StackOverflow and found ... between these two methods? See Question&Answers more detail:os...

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

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252 views

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python - understanding zip function

All discussion is about python 3.1.2; see Python docs for the source of my question. I know what zip does ... 'm missing something very simple.. See Question&Answers more detail:os...

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

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382 views

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python - How does vlc.py play video stream?

I want to use vlc.py to play mpeg2 stream http://wiki.videolan.org/Python_bindings. There are some examples ... examples to play video stream ? See Question&Answers more detail:os...

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

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1.0k views

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python - spyder - clear variable explorer along with variables from memory

To clear the console we can use the following command - import subprocess as sp tmp = sp.call('cls',shell ... from Spyder's Variable Explorer. See Question&Answers more detail:os...

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

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373 views

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python - How to remove this special character?

I was trying to unify the lines in my file when I observed the following: word1 word2 word1 word2 I did not ... and how this can be cleaned? See Question&Answers more detail:os...

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

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324 views

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python - Multi-index pivoting in Pandas

Consider the following dataframe: item_id hour when date quantity 110 0YrKNYeEoa 1 before 2015-01-26 247286 111 ... placement implies 3 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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546 views

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python - How to force errorbars to render last with Matplotlib

I am trying over-plot some empirical data with error bars on top of my modelled data. The error bars seem ... make the errorbars render on top. See Question&Answers more detail:os...

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

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426 views

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python - Problem using Django admin Actions with intermediate pages

I added an admin action send_EMAIL through admin.py. When admin uses the send_EMAIL action for selected users I want ... /form> {% endblock %} See Question&Answers more detail:os...

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

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342 views

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python - Prevent pandas from automatically inferring type in read_csv

I have a #-separated file with three columns: the first is integer, the second looks like a float ... from converting types automatically? See Question&Answers more detail:os...

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

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597 views

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python - Applying a coloured overlay to an image in either PIL or Imagemagik

I am a complete novice to image processing, and I am guessing this is quite easy to do, but I just don't ... need to carry out the process 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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592 views

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python - How to select DataFrame columns based on partial matching?

I was struggling this afternoon to find a way of selecting few columns of my Pandas DataFrame, by checking the ... the re.search() function.. See Question&Answers more detail:os...

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

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247 views

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python - Find out which font matplotlib uses

Im looking for a nice way to get the name of the default font that is used by matplotlib.pyplot. ... .font_manager.FontProperties(family=font)) See Question&Answers more detail:os...

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

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791 views

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python - pandas to_csv: ascii can't encode character

I'm trying to read and write a dataframe to a pipe-delimited file. Some of the characters are non-Roman letters ... me the bad character(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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771 views

1 answer

python - pandas read_csv column dtype is set to decimal but converts to string

I am using pandas (v0.18.1) to import the following data from a file called 'test.csv': a,b,c,d 1,1, ... )) Results: `<class 'decimal.Decimal'>` See Question&Answers more detail:os...

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

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