Recent questions tagged Python

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289 views

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python - How to create a list of random integer vector whose sum is x

Creating a random vector whose sum is X (e.g. X=1000) is fairly straight forward: import random def ... nice explanation of 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 - How to response ajax request in Django

I have code like this: $(document).ready(function(){ $('#error').hide(); $('#submit').click(function(){ ... beginner in Django, please help me. 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 - Is it possible to override __new__ in an enum to parse strings to an instance?

I want to parse strings into python enums. Normally one would implement a parse method to do so. A few days ... the enum's values alias free. 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 - Write strings/text and pandas dataframe to excel

I'd like to save some text and a dataframe to an excel file like that: Thus, I've got the following variables: ... =0) Is there an easier 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 - Why I cannot use keyword argument on range function?

In the python documenation, it says: Any function argument, no matter non-optional or optional (with default value ... arguments Why is 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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138 views

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python - Updating the x-axis values using matplotlib animation

I am trying to use matplotlib.ArtistAnimation to animate two subplots. I want the x-axis to increase in ... help would be much 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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python - Is it possible to split a network across multiple GPUs in tensorflow?

I plan to run a very large recurrent network (e.g. 2048x5), is it possible to define one layer at one GPU ... -GPU or GPU-CPU-GPU communication. 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 find degenerate rows/columns in a covariance matrix

I am using numpy.cov to create a covariance matrix from a dataset of over 400 time series. Using linalg. ... the degenerate columns. 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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python - How can I strip namespaces out of an lxml tree?

Following on from Removing child elements in XML using python ... Thanks to @Tichodroma, I have this code: If ... of the elements' tag names? 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 - Sub matrix of a list of lists (without numpy)

Suppose I have a matrix composed of a list of lists like so: >>> LoL=[list(range(10)) for i in range( ... an arbitrary matrix as a sub matrix? 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 - Importing Libraries Issue - "ImportError: No Module named ____"

I've looked through a lot of the other question/answers for this topic but no avail. I downloaded numpy ... advice would be greatly 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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354 views

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python - How to detect if a cell is empty when reading Excel files using the xlrd library?

I handle Excel files using the functions row_values and col_values: import xlrd workbook = xlrd.open_workbook( ... generate Excel files)? 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 a pointer to a list element

I was wondering if it was possible to get a "pointer" to an element in a python list. That way, I would ... to do something like that 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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799 views

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python - How to schedule and cancel tasks with asyncio

I am writing a client-server application. While connected, client sends to the server a "heartbeat" signal, ... ) finally: event_loop.close() See Question&Answers more detail:os...

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

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134 views

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python - How to convert list into set in pandas?

I have a dataframe as below: date uids 0 2018-11-23 [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, ... ! How should I convert list into set in place? See Question&Answers more detail:os...

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

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309 views

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python - OSError: [Errno 2] No such file or directory using pytesser

This is my problem, I want to use pytesser to get a picture's contents. My operating system is Mac OS 10 ... help me with this question,please? See Question&Answers more detail:os...

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

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309 views

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python - Fastest way to merge pandas dataframe on ranges

I have a dataframe A ip_address 0 13 1 5 2 20 3 11 .. ........ and another dataframe B lowerbound_ip_address ... there a better 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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336 views

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python - Can I use multiprocessing.Pool in a method of a class?

I am tring to use multiprocessing in my code for better performance. However, I got an error as follows: Traceback ... code to fix the 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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207 views

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python - Scrapy FormRequest sending JSON

I am trying to create a FormRequest that can send content-type:application/json. Here is what I try: yield ... above. Any ideas? -KM See Question&Answers more detail:os...

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

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165 views

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python - Can't upgrade Scipy

I'm trying to upgrade Scipy from 0.9.0 to 0.12.0. I use the command: sudo pip install --upgrade scipy ... s wrong. Any help will be 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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335 views

1 answer

python - How to select rows in Pandas dataframe where value appears more than once

Let's say I have the Pandas dataframe with columns of different measurement attributes and corresponding measurement values. ID ... 100 'B' 3.8 See Question&Answers more detail:os...

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

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177 views

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python - Incremental PCA on big data

I just tried using the IncrementalPCA from sklearn.decomposition, but it threw a MemoryError just like the PCA ... MemoryError Thanks for 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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222 views

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python - Fast way to remove a few items from a list/queue

This is a follow up to a similar question which asked the best way to write for item in somelist: if ... 4.01255393028 filtering = 3.59962391853 See Question&Answers more detail:os...

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

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397 views

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python - iter, values, item in dictionary does not work

Having this python code edges = [(0, [3]), (1, [0]), (2, [1, 6]), (3, [2]), (4, [2]), ... iterkeys... but that does not work How to modify code? See Question&Answers more detail:os...

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

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165 views

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python - Dataframe filtering rows by column values

I have a Dataframe df Num1 Num2 one 1 0 two 3 2 three 5 4 four 7 6 five 9 8 I want to filter rows ... can be shorter. Is there any 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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276 views

1 answer

python - why is logged_out.html not overriding in django registration?

I am using built-in django login and logout. In my Project/urls.py i have added url's for both login and ... . what could possibly be 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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486 views

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python - Plot negative values on a log scale

I am doing some analysis to calculate the value of log_10(x) which is a negative number. I am now trying ... way of plotting this data? See Question&Answers more detail:os...

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

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308 views

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python - HDF5 file created with h5py can't be opened by h5py

I created an HDF5 file apparently without any problems, under Ubuntu 12.04 (32bit version), using Anaconda as ... when I created the file? See Question&Answers more detail:os...

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

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