Recent questions tagged Python

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I have a matrix which is fairly large (around 50K rows), and I want to print the correlation coefficient between ... that I can use? 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 - Django Model Method or Calculation as Field in Database

Using Django ~=1.11 and Python 3.6 I need to store 'calculated' variables as fields in the Django model ... __str__(self): return self.unique_id 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 - Change "Quoted-printable" encoding to "utf-8"

I am trying to read email with imaplib. I get this mail body: =C4=EE=E1=F0=FB=E9 =E4=E5=ED=FC! That is ... . How can I change this to utf-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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python - Packaging resources with setuptools/distribute

I'm developing an Python egg that has several .txt dependencies (they're templates used to generate files by the ... What am I missing? 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 - os.path.getsize Returns Incorrect Value?

def size_of_dir(dirname): print("Size of directory: ") print(os.path.getsize(dirname)) is the code in question. ... the directory...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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python - Plotting timestamps (hour/minute/seconds) with Matplotlib

I want to plot some timestamps (Year-month-day Hour-Minute-Second format). I am using the following code, however it ... , "o-") plt.show() 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 concatenate pandas column with list values into one list?

I have a dataframe with one of its column having a list at each index. I want to concatenate these lists into ... head on it for several hours. 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 filter by joinloaded table in SqlAlchemy?

Lets say I got 2 models, Document and Person. Document got relationship to Person via "owner" property. Now: ... on joinloaded table/model ? 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 - flask-admin form: Constrain Value of Field 2 depending on Value of Field 1

One feature I have been struggling to implement in flask-admin is when the user edits a form, to constrain the ... app app.run(debug=True) 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 - Evaluating a mathematical expression (function) for a large number of input values fast

The following questions Evaluating a mathematical expression in a string Equation parsing in Python Safe way to ... directly for 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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python - Why doesn't this conversion to utf8 work?

I have a subprocess command that outputs some characters such as 'xf1'. I'm trying to decode it as utf8 but I get ... (s) # returns "'\xa9'" 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 - Sending OpenCV output to VLC stream

This has been keeping me busy for a good part of the afternoon and I haven't been able to get it to work ... been able to figure it out myself. 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 - Matplotlib set_clip_path requires patch to be plotted

I've just discovered a nice way to create a Matplotlib filled contour plot clipped to an arbitrary polygonal region. ... in that? Any thoughts? 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 - Querying a many-to-many relationship in SQLAlchemy

I have a pretty standard many-to-many relationship, similar to the Blog -> Keyword relationship in the ORM ... whether I am missing something. 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 cython function: AttributeError: 'module' object has no attribute 'fun'

I have written a small cython code that is #t3.pyx from libc.stdlib cimport atoi cdef int fun(char *s): return ... has no attribute 'fun' >>> See Question&Answers more detail:os...

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

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654 views

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python - Select multiple groups from pandas groupby object

I am experimenting with the groupby features of pandas, in particular gb = df.groupby('model') gb.hist() Since ... Is there a more direct 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 - Writing to a file with multiprocessing

I'm having the following problem in python. I need to do some calculations in parallel whose results I need to be ... p.join() writProc.join () See Question&Answers more detail:os...

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

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118 views

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python - Changing password in Django Admin

I recently created the admin.py based in the Django Project Document: https://docs.djangoproject.com/en/dev/topics/auth/ ... , 'password')} ), ) 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 - decorator to set attributes of function

I want different functions to be executable only if the logged in user has the required permission level. To make ... ' What am I missing? 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 - Find the indices at which any element of one list occurs in another

Take lists haystack and needles haystack = ['a', 'b', 'c', 'V', 'd', 'e', 'X', 'f', 'V', ... may contain no needles or it may contain many. See Question&Answers more detail:os...

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

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229 views

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python - Matplotlib plots not displaying in sublimetext

I've recently started using sublimetext 2, however I noticed today that the plt.show() function doesn't seem to ... meant to be used? 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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341 views

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python - Send message using Django Channels from outside Consumer class

I am building an online game, which uses Django channels 2.1.5 for websockets. I am able to build ... about synchronization at this occasion. See Question&Answers more detail:os...

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

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156 views

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python - How to modify imported source code on-the-fly?

Suppose I have a module file like this: # my_module.py print("hello") Then I have a simple script: # ... Any help would be welcome, 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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python - How to get filter to work with a lambda taking multiple arguments?

Using Python, am finding it difficult to get filter() to work with lambda for cases where more than 1 argument ... to what am doing wrong 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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309 views

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python - conda fails to create environment from yml

I'm trying to run the code below to create a virtual Python environment from a YAML file. I'm running the code ... - zeromq==4.2.5=h378b8a2_0 See Question&Answers more detail:os...

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

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1.8k views

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python - Calculating dawn and sunset times using PyEphem

Is it possible to calculate Dawn, Dusk, and sunset times using PyEphem? I've used PyEphem to produce day ... find anything on sunset/dusk/dawn See Question&Answers more detail:os...

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

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395 views

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python - Cross-validation in LightGBM

How are we supposed to use the dictionary output from lightgbm.cv to improve our predictions? Here's an ... an important transformation step? See Question&Answers more detail:os...

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

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213 views

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python - What is the pandas.Panel deprecation warning actually recommending?

I have a package that uses pandas Panels to generate MultiIndex pandas DataFrames. However, whenever I use pandas. ... method in this question. See Question&Answers more detail:os...

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

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