Recent questions tagged Python

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python - What is the parameter "max_q_size" used for in "model.fit_generator"?

I built a simple generator that yields a tuple(inputs, targets) with only single items in the inputs and ... so why the additional 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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python - OpenCV in Ubuntu 17.04

I had OpenCV installed in my Ubuntu machine running Ubuntu 16.10. Recently I updated to the latest Ubuntu 17.04 and ... dev How can I fix it ? See Question&Answers more detail:os...

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

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284 views

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python - Convert pandas series of lists to dataframe

I have a series made of lists import pandas as pd s = pd.Series([[1, 2, 3], [4, 5, 6]]) and I ... Series.to_frame seem to work. How 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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python - How to make an Inner Join in django?

I want to show in an Html the name of the city, state, and country of a publication. But they are in different ... AS y ON y.id = p.city_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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317 views

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python - How to iterate over each string in a list of strings and operate on it's elements

Im new to python and i need some help with this. TASK : given a list --> words = ['aba', 'xyz', ' ... . strings in the list. 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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python - how to fix CMake Error in CMakeLists.txt: Generator NMake Makefiles does not support platform specification, but platform x64 was specified

I want to install dlib using pip install dlib using cmd in windows 10 But it is showing following three errors: ... : 10.0.16299 Build 16299 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 - CSV read specific row

I have a CSV file with 100 rows. How do I read specific rows? I want to read say the 9th line or the 23rd line etc? 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 are finite automata implemented in code?

How does one implement a dfa or an nfa for that matter in Python code? What are some good ways to do it ... ever used in real world projects? 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 - Start async function without importing the asyncio package

Is is possible to start a function like this async def foo(): while True: print("Hello!") without ... is available only through 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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python - ValueError: feature_names mismatch: in xgboost in the predict() function

I have trained an XGBoostRegressor model. When I have to use this trained model for predicting for a new ... it matches the training structure? See Question&Answers more detail:os...

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

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231 views

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python - Allowing resizing window pyGame

I am trying to allow resizing for this app, I put the RESIZABLE flag, but when I try to resize, it ... Please tell me whats wrong, 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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python - How to disable ConvergenceWarning using sklearn?

I'm using GridSearchCV to optimize hyper-parameters for SVM. I set the maximum number of iterations because I ... terminal. 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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503 views

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python - Strategy for partitioning dask dataframes efficiently

The documentation for Dask talks about repartioning to reduce overhead here. They however seem to indicate you ... then thousands in seconds) See Question&Answers more detail:os...

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

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489 views

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python - how to implement tensorflow's next_batch for own data

In the tensorflow MNIST tutorial the mnist.train.next_batch(100) function comes very handy. I am now trying to ... batch_y = Ytr.next_batch(100) 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 - Why can't matplotlib plot in a different thread?

Minimum working example I expect the following to show a plot, but i see no plot and the interpreter just ... single and unique current figure. See Question&Answers more detail:os...

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

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440 views

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python - How to get the index of ith item in pandas.Series or pandas.DataFrame?

I'm trying to get the index of 6th item in a Series I have. This is how the head looks like: United ... this with pd.Series and pd.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 - Differences between null and NaN in spark? How to deal with it?

In my DataFrame, there are columns including values of null and NaN respectively, such as: df = spark. ... can they be dealt with? See Question&Answers more detail:os...

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

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444 views

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python - How to quit ipdb while in post-mortem debugging?

I like to inspect error in a Python script by using: $ python3 -m pdb my_script.py This drops me into a ... program How to quit this debugger? 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 - Tensorflow VarLenFeature vs FixedLenFeature

I was trying to save images of different sizes into tf-records. I found that even though the images ... use FixedLenFeature or VarLenFeature? See Question&Answers more detail:os...

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

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485 views

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python - Insert or delete a step in scikit-learn Pipeline

Is it possible to delete or insert a step in a sklearn.pipeline.Pipeline object? I am trying to do a ... undesired effect on the clf 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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293 views

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python - YAML loads 5e-6 as string and not a number

When I load a number with e form a JSON dump with YAML, the number is loaded as a string and not a float. I ... a number? How can I fix it? See Question&Answers more detail:os...

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

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193 views

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python - Write file to a directory that doesn't exist

How do I using with open() as f: ... to write the file in a directory that doesn't exist. For ... the directory and write the file there. See Question&Answers more detail:os...

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

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505 views

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python - Pandas printing ALL dtypes

This seems like a very simple problem, however it's driving me round the bend. I'm sure it should be ... .set_option('display.max_rows', 20) See Question&Answers more detail:os...

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

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304 views

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python - pip-installed uWSGI ./python_plugin.so error

I've installed uWSGI using pip and start it up with an XML to load my application. The XML config contains ... is there another great solution? 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 - How do I add a header to urllib2 opener?

cj = cookielib.CookieJar() opener = urllib2.build_opener(urllib2.HTTPCookieProcessor(cj)) opener.open('http://abc. ... the header is applied? See Question&Answers more detail:os...

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

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453 views

1 answer

python - Convert a csv.DictReader object to a list of dictionaries?

A csv file names.csv has content: first_name last_name Baked Beans Lovely Spam Wonderful Spam I would like to ... list of dictionaries? 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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342 views

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python - How do I use multiple conditions with pyspark.sql.functions.when()?

I have a dataframe with a few columns. Now I want to derive a new column from 2 other columns: from pyspark.sql ... ? I'm using Spark 1.4. See Question&Answers more detail:os...

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

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533 views

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python multiprocessing - process hangs on join for large queue

I'm running python 2.7.3 and I noticed the following strange behavior. Consider this minimal example: from ... 1,000. 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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