Recent questions tagged Python

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python - How do I get a selected string in from a Tkinter text box?

I'd like to be able to get a string out of a highlighted portion of text, how do I go about this? 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 - NumPy library ImportError: DLL load failed: The specified procedure could not be found

I'm learning python using Visual Studio 2017 on Windows 10. When I'm trying to import NumPy library into my ... procedure could not be found. 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 - Updating nested dictionaries when data has existing key

I am trying to update values in a nested dictionary, without over-writting previous entries when the key ... overwriting the previous ones? 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 - pandas invalid literal for long() with base 10 error

I am trying to do: df['Num_Detections'] = df['Num_Detections'].astype(int) And i get following error: ... correctly ? Thanks for help. 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 - virtualenv on windows 7 returns AssertionError

Having trouble with virtualenv on Windows 7. I run: virtualenv _testenv It returns: Traceback (most recent call ... DLLs') Above import _socket 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 set the primary key when writing a pandas dataframe to a sqlite database table using df.to_sql

I have created a sqlite database using pandas df.to_sql however accessing it seems considerably slower than just reading ... =None, dtype=None) 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 - Can't open video using opencv

The opencv works fine when doing other things. It can open images and show images. But it can't open a ... . The error messages never change. 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 - Find closest row of DataFrame to given time in Pandas

I have a Pandas dataframe which is indexed by a DatetimeIndex: <class 'pandas.core.frame.DataFrame'> DatetimeIndex: ... a Pandas time-series? 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 does Google Search return HTTP Error 403?

Consider the following Python code: 30 url = "http://www.google.com/search?hl=en&safe=off&q=Monkey" ... Google programmatically? Any thoughts? 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 - sys.stdin.readline() and input(): which one is faster when reading lines of input, and why?

I'm trying to decide which one to use when I need to acquire lines of input from STDIN, so I wonder how ... integers. Is that statement true ? 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 - Scipy.optimize Inequality Constraint - Which side of the inequality is considered?

I am using the scipy.optimize module to find optimal input weights that would minimize my output. From ... /Main/PythonOptimization 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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python - Override Django form field's name attr

I've built a Django form that submits to a page on another domain (that I don't control). The idea ... problems I listed above more generally 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 do I plot hatched bars using pandas?

I am trying to achieve differentiation by hatch pattern instead of by (just) colour. How do I do it using ... the Axes object returned by plot? 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 - TensorFlow - Show image from MNIST DataSet

I'm trying to learn TensorFlow and I implemented the MNIST example from the the following link: http://openmachin. ... image and show the image? 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 2.7 - OpenCV 2.4.8: module compiled against API version 9

I just installed the opencv 2.4.8 . I'm using python 2.7. I tried to add the opencv lib to python according to ... for Mac OS. I use Windows 7. 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 - UnicodeDecodeError when performing os.walk

I am getting the error: 'ascii' codec can't decode byte 0x8b in position 14: ordinal not in range(128) ... are returned as non-unicode strings. 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 - Click the javascript popup through webdriver

I am scraping a webpage using Selenium webdriver in Python The webpage I am working on, has a form. I am able to ... idea how to do it ? Thanks See Question&Answers more detail:os...

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

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227 views

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python - Avoid specifying all arguments in a subclass

I have a class: class A(object): def __init__(self,a,b,c,d,e,f,g,...........,x,y,z) #do some ... Though I am not sure whether it's possible... 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 - Create a generic serializer with a dynamic model in Meta

when i create a Serializer in django-rest0-framework, based on a ModelSerializer, i will have to pass the model in ... assign the model in 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 - Django filter events occurring today

I'm struggling to logically represent the following in a Django filter. I have an 'event' model, and a ... more simple and elegant method? See Question&Answers more detail:os...

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

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245 views

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python - Plotting 3-tuple data points in a surface / contour plot using matplotlib

I have some surface data that is generated by an external program as XYZ values. I want to create the following ... me to create these charts. See Question&Answers more detail:os...

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

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775 views

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python - BeautifulSoup: what's the difference between 'lxml' and 'html.parser' and 'html5lib' parsers?

When using Beautiful Soup what is the difference between 'lxml' and "html.parser" and "html5lib"? When would ... (response.text, 'lxml') See Question&Answers more detail:os...

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

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164 views

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python - How can you split a list every x elements and add those x amount of elements to an new list?

I have a list of multiple integers and strings ['-200', ' 0', ' 200', ' 400', ' green', '0', ' ... every time a new 5 elements goes through. 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 - Does TensorFlow view all CPUs of one machine as ONE device?

From the experiments I run, it seems like TensorFlow uses automatically all CPUs on one machine. Furthermore ... from TensorFlows perspective? See Question&Answers more detail:os...

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

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446 views

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python - Get first and second highest values in pandas columns

I am using pandas to analyse some election results. I have a DF, Results, which has a row for each constituency ... set of columns for each row? See Question&Answers more detail:os...

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

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240 views

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python - Splitting a person's name into forename and surname

ok so basically I am asking the question of their name I want this to be one input rather than Forename and ... be output is just "Winter" See Question&Answers more detail:os...

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

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431 views

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python - What does sys.stdin read?

I get how to open files, and then use Python's pre built in functions with them. But how does sys.stdin work ... still have to provide a file? See Question&Answers more detail:os...

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

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631 views

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python - numpy random choice in Tensorflow

Is there an equivalent function to numpy random choice in Tensorflow. In numpy we can get an item randomly from ... given list with p weights. See Question&Answers more detail:os...

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

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