Recent questions tagged Python

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python - How to nest records in an Avro schema?

I'm trying to get Python to parse Avro schemas such as the following... from avro import schema mySchema = "" ... record. What am I doing 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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449 views

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python - make matplotlib plotting window pop up as the active one

I'm working with python and matplotlib on mac os x. When I'm working on many different windows and I have ... up it as foreground window? 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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498 views

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python - How to get tfidf with pandas dataframe?

I want to calculate tf-idf from the documents below. I'm using python and pandas. import pandas as pd df = ... simplest solution to get tf-idf? 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 - Add Legend to Seaborn point plot

I am plotting multiple dataframes as point plot using seaborn. Also I am plotting all the dataframes on the same ... a legend. Sample output : 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 the values from a NumPy array using multiple indices

I have a NumPy array that looks like this: arr = np.array([100.10, 200.42, 4.14, 89.00, 34.55, 1.12]) ... , which is incorrect: arr[1, 4, 5] See Question&Answers more detail:os...

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

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120 views

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python - Tuple value by key

Is it possible to get Value out of tuple: TUPLE = ( ('P', 'Shtg1'), ('R', u'Shtg2'), ('D', 'Shtg3 ... use loop (too much overhead...) Thank you! 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: Generic detail view must be called with either an object pk or a slug

Getting this error when submitting the form associated with this view. Not sure what exactly is the ... += staticfiles_urlpatterns() 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 - Difference between nonzero(a), where(a) and argwhere(a). When to use which?

In Numpy, nonzero(a), where(a) and argwhere(a), with a being a numpy array, all seem to return the non- ... t they return the exact same result? 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 - Difference in output with waitKey(0) and waitKey(1)

I've just begun using the OpenCV library for Python and came across something I didn't understand. cap = cv2. ... not show as a continuous feed? See Question&Answers more detail:os...

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

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262 views

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python - Pandas: Assigning multiple *new* columns simultaneously

I have a DataFrame df with a column containing labels for each row (in addition to some relevant data for ... map(labeldict)) Better solutions? See Question&Answers more detail:os...

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

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283 views

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python - Benefits of os.path.splitext over regular .split?

In this other question, the votes clearly show that the os.path.splitext function is preferred over the simple ... comments on library usage. 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 - Manually set color of points in legend

I'm making a scatter plot which looks like this: (MWE at bottom of question) As can be seen in the image above ... =1, fontsize=10) 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 stop a function

For example: def main(): if something == True: player() elif something_else == True: computer() def player( ... do you stop functions in Python? See Question&Answers more detail:os...

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

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127 views

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python - How to check if all values in the columns of a numpy matrix are the same?

I want to check if all values in the columns of a numpy array/matrix are the same. I tried to use reduce of ... be False? Thanks for any help! See Question&Answers more detail:os...

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

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745 views

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python - What does "Symbol not found / Expected in: flat namespace" actually mean?

When I import a module I built, I get this boost-python related error: Traceback (most recent call last): File ... ? Why was this error raised? See Question&Answers more detail:os...

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

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158 views

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python - What values are returned from model.evaluate() in Keras?

I've got multiple outputs from my model from multiple Dense layers. My model has 'accuracy' as the only metric in ... but I'm still not sure. See Question&Answers more detail:os...

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

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209 views

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python - What are the URL parameters? (element at position #3 in urlparse result)

I've taken a look to urlparse.urlparse method documentation and I'm a little bit confused about what is the ... and possibly give some examples? See Question&Answers more detail:os...

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

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335 views

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python - os.mkdir(path) returns OSError when directory does not exist

I am calling os.mkdir to create a folder with a certain set of generated data. However, even though the path ... named anywhere. Help, 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 - NotImplementedError: Cannot convert a symbolic Tensor (2nd_target:0) to a numpy array

I try to pass 2 loss functions to a model as Keras allows that. loss: String (name of objective function) ... numpy array. Please help, 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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459 views

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python - pip freeze without dependencies of installed packages

When I do pip freeze I get the packages I've explicitly installed plus those packages that are dependencies of ... dependencies are not shown? 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 - import a function from another .ipynb file

I defined a hello world function in a file called 'functions.ipynb'. Now, I would like to import functions ... jupyter notebook. Thanks a lot! See Question&Answers more detail:os...

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

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234 views

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python - Append an empty row in dataframe using pandas

I am trying to append an empty row at the end of dataframe but unable to do so, even trying to ... Features second-hand 28 Movement Quartz See Question&Answers more detail:os...

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

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136 views

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python - Pandas: Creating DataFrame from Series

My current code is shown below - I'm importing a MAT file and trying to create a DataFrame from variables within it: ... what I'm trying to do. 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 - Pandas isna() and isnull(), what is the difference?

Pandas has both isna() and isnull(). I usually use isnull() to detect missing values and have never met the case so ... So, when to use isna()? See Question&Answers more detail:os...

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

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253 views

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python - How to plot the lines first and points last in matplotlib

I have a simple plot with several sets of points and lines connecting each set. I want the points to be plotted ... ) plt.savefig('example.png') See Question&Answers more detail:os...

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

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225 views

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python - pythonic way to iterate over part of a list

I want to iterate over everything in a list except the first few elements, e.g.: for line in lines[2:] ... doesn't copy the list unnecessarily? See Question&Answers more detail:os...

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

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535 views

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python - How to get more than 1000 objects from S3 by using list_objects_v2?

I have more than 500,000 objects on s3. I am trying to get the size of each object. I am using the following ... way I can get more than that? See Question&Answers more detail:os...

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

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566 views

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python 3.6 - cannot write mode RGBA as JPEG

I am learning to use 'pillow 5.0' following book 'Automate the boring stuff with python' The info about the image ... such a n error in book. See Question&Answers more detail:os...

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

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