Recent questions tagged PYTHON

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python - What is the difference between the predict and predict_on_batch methods of a Keras model?

According to the keras documentation: predict_on_batch(self, x) Returns predictions for a single batch of samples. However ... shape (n, d_out) See Question&Answers more detail:os...

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

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541 views

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python - Pretty print namedtuple

I tried pprint from pprint, but its output is just one line, there is no multiline output and no indentation. See Question&Answers more detail:os...

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

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968 views

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python - What is the preferred way to preallocate NumPy arrays?

I am new to NumPy/SciPy. From the documentation, it seems more efficient to preallocate a single array rather than ... ' way to 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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975 views

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python - Transparency in PNGs with reportlab 2.3

I have two PNGs that I am trying to combine into a PDF using ReportLab 2.3 on Python 2.5. When ... the transparency working properly? 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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366 views

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python - Installation of pygame with Anaconda

I have Anaconda 1.6.2, which uses Python 2.7.5, installed on a Windows 7 64-bit system. I need to ... and moved to Anaconda. 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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402 views

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python - Plot won't show in Jupyter

I'm new to python and I began to teach myself how to use pandas on jupyter using the exercise from this link: ... ') fixed_df['Berri1'].plot() See Question&Answers more detail:os...

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

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532 views

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python - Check if node exists in h5py

I am wondering if there is a simple way to check if a node exists within an HDF5 file using h5py. I couldn't ... a new node with the same name. See Question&Answers more detail:os...

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

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600 views

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python - pyconfig.h missing during "pip install cryptography"

I wanna set up scrapy cluster follow this link scrapy-cluster,Everything is ok before I run this command: pip ... of urls . 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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385 views

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python - change key in OrderedDict without losing order

Starting with OrderedDict([('a', 1), ('c', 3), ('b', 2)]) is it possible to end up with OrderedDict([('a ... ' and after 'a' i.e. keeping order? See Question&Answers more detail:os...

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

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613 views

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python - Plotly: How to set the range of the y axis?

I have the following code to create the line plot with Plotly. How can I set the range of Y axis to always have it ... [go.Scatter(x=x1, y=y1)] See Question&Answers more detail:os...

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

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478 views

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python - How do I write text in subscript in the axis labels and the legend?

I have the following axis labels and legend. plt.ylabel("ratio_2") plt.xlabel("n_1") plt.legend(('alpha_1','alpha_2 ... = 'best',shadow = True) See Question&Answers more detail:os...

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

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473 views

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python - How to use Faker from Factory_boy

Factory_boy uses fake-factory (Faker) to generate random values, I would like to generate some random values in my ... .create() fake.name() See Question&Answers more detail:os...

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

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715 views

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python - Numpy AttributeError: 'float' object has no attribute 'exp'

Here is my code: def sigmoid(X, T): return (1.0 / (1.0 + np.exp(-1.0*np.dot(X, T)))) And this ... no attribute 'exp'". X, t are Numpy ndarray. 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 - Dependency rule tried to blank out primary key in SQLAlchemy, when foreign key constraint is part of composite primary key

I have the following model definitions class Foo(Base): __tablename__ = 'foo' id = Column(Integer, primary_key= ... '<FooCycle at 0x39cda10>' See Question&Answers more detail:os...

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

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433 views

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python - When plotting with Bokeh, how do you automatically cycle through a color pallette?

I want to use a loop to load and/or modify data and plot the result within the loop using Bokeh (I am ... the word cycle anywhere on the page. See Question&Answers more detail:os...

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

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218 views

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python - What can `__init__` do that `__new__` cannot?

In Python, __new__ is used to initialize immutable types and __init__ typically initializes mutable types. If __init__ ... or impossible 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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272 views

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python - Django: "No module named context_processors" error after reboot

I have a Django site that works on my PC, and was working briefly on my server after loading it ... Value: No module named context_processors See Question&Answers more detail:os...

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

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395 views

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python - How can I reorder multi-indexed dataframe columns at a specific level

I have a multi-indexed DataFrame with names attached to the column levels. I'd like to be able to easily shuffle ... an easier way to 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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430 views

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python - Retrieve all items from DynamoDB using query?

I am trying to retrieve all items in a dynamodb table using a query. Below is my code: import boto.dynamodb2 ... I retrieve all items though? See Question&Answers more detail:os...

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

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814 views

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python - sqlalchemy: get max/min/avg values from a table

I have this query: mps = ( session.query(mps) .filter_by(idc = int(c.idc)) .filter_by(idmp = int(m.idmp)) ... this? Can you give me an example? See Question&Answers more detail:os...

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

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310 views

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python - How do I get warnings.warn to issue a warning and not ignore the line?

I'm trying to raise a DeprecationWarning, with a code snippet based on the example shown in the docs. http:// ... I get warn to actually warn? 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 - Pythonic way to iterate through a range starting at 1

Currently if I want to iterate 1 through n I would likely use the following method: for _ in range(1, n+1): ... 1 at the end of the 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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391 views

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python - NumPy append vs concatenate

What is the difference between NumPy append and concatenate? My observation is that concatenate is a bit faster and append ... , 6, 5, 6]) See Question&Answers more detail:os...

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

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1.2k views

1 answer

python - Create conda environment: "Found conflicts!" when solving environment and "Finding shortest conflict path" running forever

I was provided with an environment.ubuntu.yml file to be able to create a conda environment. However, running conda create ... 0 - deap==1.3.0 See Question&Answers more detail:os...

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

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791 views

1 answer

python - How to rotate X-axis labels in bokeh figure?

I'm just starting to use Bokeh. Below I create some args I use for the rect figure. x_length = var_results ... and not just an overlapping mess? See Question&Answers more detail:os...

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

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288 views

1 answer

python - pandas DataFrame diagonal

What is an efficient way to get the diagonal of a square DataFrame. I would expect the result to be a Series with a ... a 2 B b 2 C c 3 See Question&Answers more detail:os...

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

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436 views

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python - Get AWS Account ID from Boto

I have an AWS_ACCESS_KEY_ID and an AWS_SECRET_KEY. These are active credentials, so they belong to an active user, ... ID of this AWS Account? See Question&Answers more detail:os...

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

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539 views

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python - Gmail API Error from Code Sample - a bytes-like object is required, not 'str'

I'm incorporating the Gmail API into a program that I'm making, and I'm getting an error that I haven't ... like object is required, not 'str' See Question&Answers more detail:os...

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

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