Recent questions tagged Python

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python opencv cv2.cv.CV_CAP_PROP_FRAME_COUNT get wrong numbers

import os import cv2 path='/home/nlpr4/video-data/UCF-101/GolfSwing/v_GolfSwing_g24_c06.avi' cap=cv2.VideoCapture( ... different? what's 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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python - findspark.init() IndexError: list index out of range error

When running the following in a Python 3.5 Jupyter environment I get the error below. Any ideas on what is ... : list index out of range See Question&Answers more detail:os...

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

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481 views

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python - How to get a non-shuffled train_test_split in sklearn

If I want a random train/test split, I use the sklearn helper function: In [1]: from sklearn.model_selection ... obtain a non-shuffled split. See Question&Answers more detail:os...

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

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430 views

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python - Non-Integer Class Labels Scikit-Learn

Quick SVM question for scikit-learn. When you train an SVM, it's something like from sklearn import svm s = ... labels will work. Any ideas? See Question&Answers more detail:os...

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

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368 views

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python - compatibility issue with contourArea in openCV 3

I am trying to do a simple area calculation of contours I get from findContours. My openCv version ... cv2.RETR_TREE, cv2.CHAIN_APPROX_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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683 views

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python - Reshape of pandas series?

It looks to me like a bug in pandas.Series. a = pd.Series([1,2,3,4]) b = a.reshape(2,2) b b has type ... error as well? I am at pandas 0.9.1. See Question&Answers more detail:os...

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

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636 views

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python - Is collections.defaultdict thread-safe?

I have not worked with threading in Python at all and asking this question as a complete stranger. I am ... I'm pretty confused. Ideas? 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 - Proper way to quit/exit a PyQt program

I have a script which has a login screen and if the cancel button is pressed, I want to exit the application ... () sys.exit(app.exec_()) 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 - glob and bracket characters ('[]')

/Users/smcho/Desktop/bracket/[10,20] directory has "abc.txt", but when I run this Python code import glob ... any way to solve this 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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420 views

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python 3.x - Can't get rid of blank rows in csv output

I've written a very tiny script in python scrapy to parse name, street and phone number displayed across multiple pages ... -o items.csv -t csv 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 - TypeError: '>' not supported between instances of 'list' and 'int'

I'm working on a library for calculating certain values in a game. I have this code: million = [1000000, "M" ... int' What's causing this 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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295 views

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python - Changing accuracy value and no change in loss value in binary classification using Tensorflow

am trying to use a deep neural network architecture to classify against a binary label value - 0 and +1. ... presented in non-normalized form. 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 library or code to read already open Excel file

Suppose I have an Excel 2013 file already open (say XYZ.xlsx) - this file gets some data via a DDE link. ... it read an active open workbook? See Question&Answers more detail:os...

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

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280 views

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python - Django serving each app separately in each its port

I've got a very simple project running on Django (no models yet) and I need to do the following: I have ... I go about it? Thanks in advance See Question&Answers more detail:os...

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

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1.1k views

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python - django-import-export: cannot exclude id field during import : KeyError: u'id'

On Django-1.9.6, django-import-export-0.5 When I try to upload CSV without "id" field throws this error. ... .fields[key] KeyError: u'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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313 views

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python - How to make a new list of first elements from existing list of lists

I have a list below. I need to use it to create a new list with only country names. How do I loop x in ... outcome should look like UK US EG JP See Question&Answers more detail:os...

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

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448 views

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python - Pandas iterating over multiple rows at once with overlap

I have a pandas DataFrame that need to be fed in chunks of n-rows into downstream functions (print in the ... n-rows of a pandas.DataFrame? See Question&Answers more detail:os...

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

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363 views

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python - Use cv2.connectedComponents and eliminate elements with a small number of pixels

I want to use the function cv2.connectedComponents to connect components on a binary image, like the following.. ... labeled_img) cv2.waitKey() See Question&Answers more detail:os...

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

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454 views

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python - How to sample from Cartesian product without repetition

I have a list of sets, and I wish to sample n different samples each containing an item from each set. ... ), itertools.product(*list_of_sets))) See Question&Answers more detail:os...

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

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632 views

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python - Unable to use Conda with Anaconda 2018.2 on Windows

I just did a fresh installation of Anaconda 2018.2 on Windows 10. This anaconda version uses python v3.7. While ... is not available."))')) See Question&Answers more detail:os...

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

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416 views

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python - How to efficiently check if a list of words is contained in a Spark Dataframe?

Using PySpark dataframes I'm trying to do the following as efficiently as possible. I have a dataframe with a ... me out? Thanks in advance. See Question&Answers more detail:os...

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

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391 views

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python - How to read a CSV file without using external libraries (such as Numpy, Pandas)?

This is a question that usually appears in interviews. I know how to read csv files using Pandas. However I am ... would help read csv 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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589 views

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python - Getting the coordinates of a Matplotlib annotation label in figure coordinates

I'd like to know the coordinates of the bounding rectangle of a text annotation to a Matplotlib plot in figure ... I want the properties of. See Question&Answers more detail:os...

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

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477 views

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python - Pyspark: Using repartitionAndSortWithinPartitions with multiple sort Critiria

Assuming I am having the following RDD: rdd = sc.parallelize([('a', (5,1)), ('d', (8,2)), ('2 ... care only to be sorted inside the partitions.) See Question&Answers more detail:os...

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

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483 views

1 answer

python - Selenium: retrieve data that loads while scrolling down

I'm trying to retrieve elements in a page that has an ajax-load scroll-down functionality alla Twitter ... ('stream-item')) 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

1 answer

python - What are the upper and lower bound for Chinese char in UTF-8?

I would like to make a set in python contains all the ord() of the Chinese chars: for English the equivalent is : english ... ),ord('Z') + 1 )) See Question&Answers more detail:os...

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

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614 views

1 answer

python - Use `rpy2` with packages installed for `R` in conda virtual environment?

I have been trying to keep my environment non-redundant and clean so I made an R environment and wiped ... the dependencies for each package See Question&Answers more detail:os...

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

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412 views

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python - Merge and sync stdout and stderr?

say I'm running an exe from a python script using: subprocess.call(cmdArgs,stdout=outf, stderr=errf) when outf ... and source(our/err). 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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