Recent questions tagged Python

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python logging root logger does not show info even if I set the level to INFO

I created the following script. Could any of you explain to me why the output is like what shows below Source ... no output but logging.info has 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 define enum values that are functions?

I have a situation where I need to enforce and give the user the option of one of a number of ... or equivalent return theFunction.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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python - How To Run Arbitrary Code After Django is "Fully Loaded"

I need to perform some fairly simple tasks after my Django environment has been "fully loaded". More specifically ... fully loaded into memory? 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 Contours - need more than 2 values to unpack

I am trying to implement contours using the following code.. im = cv2.imread('C:UsersPrashantDesktopT.jpg') imgray = ... i do to correct 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 - Airflow depends_on_past explanation

According to the official Airflow docs, The task instances directly upstream from the task need to be in a success ... run in the current run? 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 collapse consecutive delimiters?

The default split method in Python treats consecutive spaces as a single delimiter. But if you specify a delimiter ... a more convenient 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 am I getting "LinAlgError: Singular matrix" from grangercausalitytests?

I am trying to run grangercausalitytests on two time series: import numpy as np import pandas as pd from statsmodels. ... why this is the case. 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 makemessages errors Unknown encoding "utf8"

I installed python separated from yum. Now, I need to recompile the language pack for the OSQA system, but get ... help me to solve this issue? 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 - Calendar: day/month names in specific locale

I am playing with Python's calendar module that's in the standard library. Basically I need a list of all days ... . Anyone got a smart 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 - Can Django ORM do an ORDER BY on a specific value of a column?

I have a table 'tickets' with the following columns id - primary key - auto increment title - varchar(256) ... the QuerySet.order_by() method? 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 - Executing functions within switch dictionary

I have encountered a problem when putting all the modules I've developed into the main program. The switch ... execute the correct 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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python - How to check out a branch with GitPython

I have cloned a repository with GitPython, now I would like to checkout a branch and update the local ... to checkout an named branch. 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 Tkinter Window Size

How do I get the width and height of a Tkinter window? See Question&Answers more detail:os...

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

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292 views

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python - How to use subprocess when multiple arguments contain spaces?

I'm working on a wrapper script that will exercise a vmware executable, allowing for the automation of virtual ... python2.5.2/cygwin/winxp 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 get_dummies on multiple columns

I have a dataset with multiple columns that I wish to one hot encode. However, I don't want to have the ... appear on one of the columns. See Question&Answers more detail:os...

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

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450 views

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python - Determine which Button was pressed in Tkinter?

I'm making a simple little utility while learning Python. It dynamically generates a list of buttons: for method in ... might be able to tell? See Question&Answers more detail:os...

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

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514 views

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python - Compute inverse of 2D arrays along the third axis in a 3D array without loops

I have an array A whose shape is (N, N, K) and I would like to compute another array B with the same shape where B ... 2])))).transpose(1, 2, 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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446 views

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python - Is numpy.sum implemented in such a way that numerical errors are avoided?

It is well known that adding up numbers can result in numerical errors (for example, if the first number ... that numerical errors are avoided? See Question&Answers more detail:os...

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

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265 views

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python - What does 'result[::-1]' mean?

I am just coming cross the following python code which confuses me a bit: res = self.result[::-1].encode(' ... -1] mean, especially the colons? 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 - Count appearances of a value until it changes to another value

I have the following DataFrame: df = pd.DataFrame([10, 10, 23, 23, 9, 9, 9, 10, 10, 10, 10, 12], columns=[' ... :3 10:4 12:1 How can I 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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345 views

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python - Print `numpy.ndarray` on a single line

While using scipy/numpy, I do get information that I store into a numpy.ndarray >>> a array([[ 0.15555605, ... the surrounding array(...))? 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 - Can I make a 32-bit program with cx_Freeze if I have a 64-bit OS?

I am currently running Windows 7 Home 64-bit and am working on a program that I would like to make available ... }}, executables = executables ) See Question&Answers more detail:os...

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

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476 views

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python - Get the memory address pointed to by a ctypes pointer

Short version: How can I get the address that a ctypes pointer points to? Long version: I have registered a python ... buf. How can I 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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605 views

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python - Plot a Single XGBoost Decision Tree

I am using method on https://machinelearningmastery.com/visualize-gradient-boosting-decision-trees-xgboost-python/ to ... ' is quite 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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445 views

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python - numpy array subclass unexpedly shares attributes across instances

I am having a weird subclass numpy.ndarray issue that feels like Values of instance variables of superclass persist across ... ' b.attrs # {} See Question&Answers more detail:os...

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

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302 views

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python - Contents of locmem cache in Django?

I was trying to use the locmem cache for my web application but couldn't find any documentation on how to ... memcache, not the locmem cache. See Question&Answers more detail:os...

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

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356 views

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python - JSON: save one dict per line

How do I save a list of python dictionaries to a file, where each dictwill be saved in one line? I know I can ... ... {key1:value,key2: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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452 views

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python - What's the difference between setattr() and object.__setattr__()?

I know that you can't call object.__setattr__ on objects not inherited from object, but is there anything else that ... 2.6, if this matters. See Question&Answers more detail:os...

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

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