Recent questions tagged Python

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python - Computing age from to_timedelta is weird, and DateOffset is not scalable over a Series

I have two columns: date age 0 2016-01-05 47.0 1 2016-01-05 43.0 2 2016-01-05 28.0 3 2016- ... a good (pythonic and vectorized) solution here? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Row Division in Scipy Sparse Matrix

I want to divide a sparse matrix's rows by scalars given in an array. For example, I have a csr_matrix ... this efficiently in sparse matrices? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Issue querying from Access database: "could not convert string to float: E+6"

I have a database in MS Access. I am trying to query one table to Python using pypyodbc. I get the ... such and ignore any scientific notation. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - How to find elements that are common to all lists in a nested list?

I have a large nested list and each list within the nested list contains a list of numbers that are formatted ... elements of the nested list. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - After I convert PY to EXE using PyInstaller it throw error

after I converted my PY file to EXE and I ran it, I got this error: Traceback ( ... drive/folders/1F7I4xEphB3d2ErDPs7vGDpT7trTmHKgC?usp=sharing See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Vector normalization

The formula for half vector is (Hv) = (Lv + Vv) / |Lv+Vv|, where Lv is light vector, and Vv is view vector. ... + Vvz) / Hn) # half-way vector See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Calling a cython library with multiple pyx files through c++

I have a python project that I want to call from a c++ application. I would like to bundle all ... single shared library solution to work? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - How to output XML entity references

I am using Python xml.etree.ElementTree to output XML. I want to output it with entity references that will be ... are always rendered as &. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - flatten list of lists of lists to a list of lists

I've already searched SO for how to flatten a list of lists (i.e. here:Making a flat list out of list ... of floats as well. Any suggestions? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Identify which query matched in bool query elasticsearch

I'm querying my elasticsearch index with a bool query. The query itself has a structure similar to this { "query": ... I have to manually do it? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Passing a cython function vs a cython method to scipy.integrate

I am trying work out how to use cython to speed up a calculation involving integration that is done within ... integration functions, not scipy. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - BigQuery table truncation before streaming not working

We are using BigQuery Python API to run some analyzes. To do so, we created the following adapter: def ... me know. Thanks in advance! See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Iterate over n successive elements of list (with overlapping)

The itertools python module implements some basic building blocks for iterators. As they say, "they form an ... only for exploratory purposes. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - "ImportError: DLL load failed" when trying to import pymssql on Windows

I'm trying to use the example code from here: http://www.pymssql.org/en/latest/pymssql_examples.html I installed ... found. What am I missing? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - How does numpy.tensordot function works step-by-step?

I am new to numpy, So I have some problem visualizing the working of the numpy.tensordot() function. According to the ... 2]] for axes=0,1,2 See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Tkinter animation will not work

I am trying to display the animation from my gif image. From my previous question, I discovered that Tkinter doesn ... 100+100") root.mainloop() See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - The event loop is already running

I have the following 5 files: gui.py # -*- coding: utf-8 -*- from PyQt4 import QtCore, QtGui try: _fromUtf8 = ... what's wrong with the code... See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Appending to range function

EDIT: Thank you for your kind replies on how to accomplish what I am trying to do, but the question is about WHY ... , 10, 0] What's happening? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - How to avoid floating point arithmetics issues?

Python (and almost anything else) has known limitations while working with floating point numbers (nice overview ... .9459999999999997 < 1.946 See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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518 views

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python - Get timezone abbreviation from UTC offset

I have the UTC offset in my DB for the users: +5:30 How can I get the timezone abbreviation from this UTC ... possible to do this using Python? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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233 views

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python - Melting a pandas dataframe

I have a dataframe like this NSW VIC 0 6718023 5023203 1 6735528 5048207 2 6742690 5061266 3 6766133 5083593 4 ... can i finish this job? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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136 views

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python - Checkbuttons and buttons: using lambda

I am trying to make a number of checkboxes based on a list, however it looks as if I am screwing up the command ... 4343" or button "CSE 4444". See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Why I get null results from date_format() PySpark function?

Suppose there is a dateframe with a column comprised of dates as strings. For that assumption, we create the ... results is what I want. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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392 views

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python - Pycharm error while importing matplotlib.pyplot as plt

I am using pycharm for python in windows 8. I have installed the package matplotlib. I am using python 2.7 when ... out what i am doing wrong? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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310 views

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python - autodoc: base classes are shown with full name instead of respecting the import

I hope I find a solution here for this quite intricate problem. I use sphinx and intersphinx to document ... here intersphinx will properly link See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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177 views

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python 3.x - Keras Image Preprocessing

My training images are downscaled versions of their associated HR image. Thus, the input and the output images aren't ... project. Thank you! :) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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453 views

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python - How to use expand in snakemake when some particular combinations of wildcards are not desired?

Let's suppose that I have the following files, on which I want to apply some processing automatically ... the undesired wildcards combinations? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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343 views

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python - How to properly use cv2.findContours() on opencv version 4.4.0.?

Im trying to use cv2.findContours() on opencv version 4.4.0. (Im using Python version 3.8.5) but it throws an ... to unpack (expected 3, got 2) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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