Recent questions tagged Python

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python concurrent.futures.ProcessPoolExecutor: Performance of .submit() vs .map()

I am using concurrent.futures.ProcessPoolExecutor to find the occurrence of a number from a number range. ... ProcessPoolExecutor.submit(). 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 - Calculate angle (clockwise) between two points

I have been not using math for a long time and this should be a simple problem to solve. Suppose I have two ... any way to code this 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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python - Get full traceback

How can i get full traceback in the following case, including the calls of func2 and func functions? import ... ('Dummy') Exception: Dummy 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 2.7 - pip is error,TypeError: __call__() takes exactly 2 arguments (1 given)

system centos 7.2 Python 2.7.5 install I install webhook pip install webhook ### but hava error,then yum install ... So,what should I 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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python - How does the pyspark mapPartitions function work?

So I am trying to learn Spark using Python (Pyspark). I want to know how the function mapPartitions work ... I achieve that using mapPartitions. 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 requests - POST Multipart/form-data without filename in HTTP request

I am trying to replicate the following POST request using the requests module in python: POST /example/asdfas HTTP/1.1 ... form> </body> </html> 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 - virtualenv(python3.4), pip install mysqlclient error

I created virtualenv for django 1.9 project. I am trying to pip install mysqlclient or mysql-python ... cdxcssp9/mysqlclient any suggestions!? 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 - what is the difference between Flatten() and GlobalAveragePooling2D() in keras

I want to pass the output of ConvLSTM and Conv2D to a Dense Layer in Keras, what is the difference between ... (Dense(256,activation='relu')) 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 - Generating all 5 card poker hands

This problem sounds simple at first glance, but turns out to be a lot more complicated than it seems. It's got ... 've gone wrong in my attempt? 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 - Plotting results of Pandas GroupBy

I'm starting to learn Pandas and am trying to find the most Pythonic (or panda-thonic?) ways to do certain ... D values for the two groups? 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 - Multiple outputs in Keras

I have a problem which deals with predicting two outputs when given a vector of predictors. Assume that a ... outputs in the final layer. 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 - Celery Worker Database Connection Pooling

I am using Celery standalone (not within Django). I am planning to have one worker task type running on multiple ... some other 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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python - How to retain column headers of data frame after Pre-processing in scikit-learn

I have a pandas data frame which has some rows and columns. Each column has a header. Now as long as I ... manipulation on my pandas data frame. See Question&Answers more detail:os...

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

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275 views

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python - pip3 error - '_NamespacePath' object has no attribute 'sort'

I tried to install a package through pip3, and I got this error. Every pip/pip3 command that I run gives me this ... 16.04 with Python 3.5.2 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 3.x - Error while finding spec for 'fibo.py' (<class 'AttributeError'>: 'module' object has no attribute '__path__')

I have a module in a fibo.py file which has the following functions - #fibonacci numbers module def fib(n): # ... not sure 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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python - Retrieving Data from SQL Using pyodbc

I am trying to retrieve data from an SQL server using pyodbc and print it in a table using Python. ... suggestions would be greatly appreciated. See Question&Answers more detail:os...

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

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233 views

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python - Debugging with PyCharm terminal arguments

I have been using PyCharm for a bit so I am not an expert. How I normally ran my programs was with ... setting break points and pressing debug. 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 and sys.argv

if len(sys.argv) < 2: sys.stderr.write('Usage: sys.argv[0] ') sys.exit(1) if not os.path.exists(sys.argv[ ... the sys.argv's by stderr or not. 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 - numpy divide row by row sum

How can I divide a numpy array row by the sum of all values in this row? This is one example. But I'm pretty ... ], [ 0.16666667, 0.83333333]]) 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 - Filter df when values matches part of a string in pyspark

I have a large pyspark.sql.dataframe.DataFrame and I want to keep (so filter) all rows where the URL saved ... properly? Many 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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381 views

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python - Clear all items from the queue

How can I clear a queue. For example I have datas in a queue, but for some reason I don't need the ... this work: oldQueue = Queue.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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138 views

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python - Copy all values in a column to a new column in a pandas dataframe

This is a very basic question, I just can not seem to find an answer. I have a dataframe like this, ... . Any help is greatly appreciated. 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 - What is the difference between socket.send() and socket.sendall()?

I'm confused about socket.send() and socket.sendall() functions in Python. As I understand from the ... web applications? 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 - substring of an entire column in pandas dataframe

I have a pandas dataframe "df". In this dataframe I have multiple columns, one of which I have to substring. ... take a very long time process. 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 - What is the difference between chain and chain.from_iterable in itertools?

I could not find any valid example on the internet where I can see the difference between them and why to choose one over the other. See Question&Answers more detail:os...

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

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112 views

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python - cannot import name patterns

Before I wrote in urls.py, my code... everything worked perfectly. Now I have problems - can't go to my ... said what error is somewhere here. See Question&Answers more detail:os...

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

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165 views

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python - sqlalchemy IS NOT NULL select

How can I add the filter as in SQL to select values that are NOT NULL from a certain column ? SELECT ... ).select_from(table).where(all_filters) See Question&Answers more detail:os...

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

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157 views

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python - dynamically set database based on request in django

I am writing a multi-tenant application with python-django. I want to set database connection based on each ... feasible, and lastly How? See Question&Answers more detail:os...

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

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