Recent questions tagged Python

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python - Extremely slow model load with keras

I have a set of Keras models (30) that I trained and saved using: model.save('model{0}.h5'.format ... ) model.load_weights("model.h5") See Question&Answers more detail:os...

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

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484 views

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python - Airflow: How to SSH and run BashOperator from a different server

Is there a way to ssh to different server and run BashOperator using Airbnb's Airflow? I am trying to run ... shell run Hive command 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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350 views

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python - How to replace all non-NaN entries of a dataframe with 1 and all NaN with 0

I have a dataframe with 71 columns and 30597 rows. I want to replace all non-nan entries with 1 and ... dataframe had multiple string entries. See Question&Answers more detail:os...

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

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274 views

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python - Read CSV file to numpy array, first row as strings, rest as float

I have data stored in a CSV where the first row is strings (column names) and the remaining rows are numbers. ... delimiter=',', skip_header=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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python - Does setting numpy arrays to None free memory?

I have hundreds of really larges matrices, like (600, 800) or (3, 600, 800) shape'd ones. Therefore I ... its referenced objects are "deleted"? See Question&Answers more detail:os...

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

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447 views

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python - Multiple histograms in Pandas

I would like to create the following histogram (see image below) taken from the book "Think Stats". However, I ... the final figure to look: See Question&Answers more detail:os...

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

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708 views

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python - Django error. Cannot assign must be an instance

I get the following error when I try to run an insert into one of my tables. Cannot assign "1": " ... =get_image_path, blank=True, null=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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303 views

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python - How to display line numbers in IPython Notebook code cell by default

I would like my default display for IPython notebook code cells to include line numbers. I learned from Showing ... this in the documentation. See Question&Answers more detail:os...

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

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560 views

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python - Handling large file uploads with Flask

What would be the best way to handle very large file uploads (1 GB +) with Flask? My application ... and have fewer options for webservers 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 can I "unpivot" specific columns from a pandas DataFrame?

I have a pandas DataFrame, eg: x = DataFrame.from_dict({'farm' : ['A','B','A','B'], 'fruit':['apple', ... 't been able to make it work. 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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438 views

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python - Using queues results in asyncio exception "got Future <Future pending> attached to a different loop"

I'm trying to run this simple code with asyncio queues, but catch exceptions, and even nested exceptions. ... print the numbers from out_queue. See Question&Answers more detail:os...

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

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496 views

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python - Scipy.optimize: how to restrict argument values

I'm trying to use scipy.optimize functions to find a global minimum of a complicated function with several arguments ... time in my case. See Question&Answers more detail:os...

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

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583 views

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python - How to get unique values from multiple columns in a pandas groupby

Starting from this dataframe df: df = pd.DataFrame({'c':[1,1,1,2,2,2],'l1':['a','a','b','c','c','b'],' ... [c, b, e, f] Name: l1, dtype: object See Question&Answers more detail:os...

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

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443 views

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python - Best way to access the Nth line of csv file

I have to access the Nth line in a CSV file. Here's what I did: import csv the_file = open('path', 'r') ... .islice(csv.reader(f), N, None) See Question&Answers more detail:os...

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

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495 views

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python - Matplotlib: plotting transparent histogram with non transparent edge

I am plotting a histogram, and I have three datasets which I want to plot together, each one with different colours and ... (0, 7) 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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191 views

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python - How do I retrieve a Django model class dynamically?

Without having the full module path of a Django model, is it possible to do something like: model = 'User' [ ... name django is not defined." See Question&Answers more detail:os...

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

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186 views

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python - How to tell for which object attribute pickle fails?

When you pickle an object that has some attributes which cannot be pickled it will fail with a generic error ... test_meth causes the 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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179 views

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python - Getting a list of errors in a Django form

I'm trying to create a form in Django. That works and all, but I want all the errors to be at the top ... just outputs the names of the fields. See Question&Answers more detail:os...

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

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530 views

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python - what does yield without value do in context manager

import contextlib import time @contextlib.contextmanager def time_print(task_name): t = time.time() try: yield ... when using this decorator? 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 does adaptive pooling in pytorch work?

Adaptive pooling is a great function, but how does it work? It seems to be inserting pads or shrinking/expanding ... about the way this works? See Question&Answers more detail:os...

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

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258 views

1 answer

python - Converting byte string in unicode string

I have a code such that: a = "u0432" b = u"u0432" c = b"u0432" d = c.decode('utf8') print(type(a ... I saw the character, instead of its code? See Question&Answers more detail:os...

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

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243 views

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python - How come unpacking is faster than accessing by index?

I'm referring to this question, and especially the comments to the first answer from @David Robinson and @mgilson: ... does which takes time? See Question&Answers more detail:os...

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

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214 views

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python - Get first list index containing sub-string?

For lists, the method list.index(x) returns the index in the list of the first item whose value is x. ... 1 provided with the argument tiger. See Question&Answers more detail:os...

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

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353 views

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python - How to activate different anaconda environment from powershell

I have two environments in anaconda, namely: root, 2env. When I open anaconda prompt, I can switch from root ... on how to fix 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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704 views

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python - Increase DPI of Matplotlib .show() in Jupyter Notebook

I'm using Matplotlib in a Jupyter Notebook to display an image of a map. The code looks like this: ... shown in the Jupyter Notebook? 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

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python - How can I check the existence of attributes and tags in XML before parsing?

I'm parsing an XML file via Element Tree in python and and writing the content to a cpp file. The content ... tags and then take their values. See Question&Answers more detail:os...

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

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373 views

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python - Make Selenium wait 10 seconds

Yes I know the question has been asked quite often but I still don't get it. I want to make Selenium wait, no ... not seem to be a 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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239 views

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python - Convert DataFrameGroupBy object to DataFrame pandas

I had a dataframe and did a groupby in FIPS and summed the groups that worked fine. kl = ks. ... pandas.core.groupby.DataFrameGroupBy object. See Question&Answers more detail:os...

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

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