Recent questions tagged Python

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python - Why does ordering matter in type hinting?

Why is this ok class Ship: def __init__(self, parent): self.parent = parent class Fleet: def __init__(self): ... 3.6.5/Anaconda/Windows 10. 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 do I raise an exception when assigning to an attribute which is NOT mapped to an SQLAlchemy column?

With SQLAlchemy, I'm finding that sometimes I mis-type a name of an attribute which is mapped to a column, ... column would raise an exception? 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 do you listen to notifications from iTunes on a Mac (Using the NSDistributedNotificationCenter)

Looking for help/tutorials/sample code of using python to listen to distributed notifications from applications on a ... this to monitor iTunes. 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 - MemoryError using json.dumps()

I would like to know which one of json.dump() or json.dumps() are the most efficient when it comes to ... ideas besides using json.dump()? 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 - Find all consecutive sub-sequences of length n in a sequence

I want to find all consecutive sub-sequences of length n in a sequence. E.g. say n was 3 and the sequence was: ... [4,5,10]] 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 - PyUSB ValueError: No backend available

I am runing Python 2.7.8 at Win 7 operation system. I am trying to communicate a USB device (Numato ... ') ValueError: No backend available 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 - Adding rows for each month in a dataframe based on column date

I am dealing with financial data which i need to extrapolate for different months. Here is my dataframe: ... achieve the desired 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 do you have a bot add a reaction using a custom emoji?

I'm trying to add a custom emoji as a reaction to a message using discord.py version 0.16.12 and ... object from the get_all_emojis function? 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 - urllib2 opener providing wrong charset

When I open the url and read it, I can't recognize it. But when I check the content header it says it is ... I could get this to 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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python - Can mypy handle list comprehensions?

from typing import Tuple def test_1(inp1: Tuple[int, int, int]) -> None: pass def test_2(inp2: Tuple[int, ... way of defining the type 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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python - Unable to upload files with Flask on Heroku

I'm attempting to add a file addition button that uploads a file to a folder on my Flask Heroku app but I ... service=6ms status=503 bytes=568 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 - Using len for text but discarding spaces in the count

So, I am trying to create a program which counts the number of characters in a string which the user inputs, ... together and print the total. 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 - Running exec inside function

How can you use the python exec keyword inside functions? See Question&Answers more detail:os...

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

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299 views

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python - Scraping text without javascript code using scrapy

I'm currently setting up a bunch of spiders using scrapy. These spiders are supposed to extract only text (articles ... script) but to no avail. 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 can I reliably read exactly n bytes from a TCP socket?

Context: It is common that a binary protocol defines frames of a given size. The struct module is good at ... a C buffer multiple times? See Question&Answers more detail:os...

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

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406 views

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python 3.x - How to Remove outlier from DataFrame using IQR?

I Have Dataframe with a lot of columns (Around 100 feature), I want to apply the interquartile method and ... (df_in[col_name] < fence_high)] 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 - Plotly: How to remove empty dates from x axis?

I have a Dataframe Date Category Sum 0 2019-06-03 "25M" 34 1 2019-06-03 "25M" 60 2 2019-06-03 " ... remove the empty Dates from the plotly graph 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 - Efficient chain merge in pandas

I found that straightforward chain merging with pandas library is quite inefficient when you merge a lot of datasets ... a lot of datasets? 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 - Limit/mask matplotlib contour to data area

I have a pandas DataFrame with non-uniformly spaced data points given by an x, y and z column, where x ... the above Dataframe as 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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python - PyDev: How to invoke debugging specific command from console (with breakpoints)?

Suppose I wrote a function, which I want to debug. PyDev helps debugging a lot with its advanced features, ... access them from Variables view: See Question&Answers more detail:os...

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

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208 views

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python - Getting 401 on Twitter OAuth POST requests

I am trying to use Twitter OAuth and my POST requests are failing with a 401 (Invalid OAuth Request) error. ... the oauth.py Python library. See Question&Answers more detail:os...

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

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316 views

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python - Cumulative counts in NumPy without iteration

I have an array like so: a = np.array([0.1, 0.2, 1.0, 1.0, 1.0, 0.9, 0.6, 1.0, 0.0 ... input array. Any ideas how to do this without iteration? See Question&Answers more detail:os...

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

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380 views

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python - Pandas: Exponentially decaying sum with variable weights

Similar to this question Exponential Decay on Python Pandas DataFrame, I would like to quickly compute exponentially decaying ... .20 1 2.648684 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 - Create pandas dataframe from json objects

I finally have output of data I need from a file with many json objects but I need some help with converting the below ... , 55, 179, 176, ... 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 socket send immediately

The problem with sockets is that they buffer data and send it when buffer fills or in given interval. Any ... In my case milliseconds count. See Question&Answers more detail:os...

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

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259 views

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python - UnboundLocalError: local variable 'batch_index' referenced before assignment

This is NOT MY code by here is the line, where it shows a problem: model.fit(trainX, trainY, batch_size ... Why keras shows different versions?? See Question&Answers more detail:os...

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

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336 views

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python - Broken pipe error selenium webdriver, when there is a gap between commands?

Ubuntu 18.x + selenium webdriver(Firefox) Facing a weird problem, the following block works if I run all of it ... someone help me out. 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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156 views

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python - Show the final y-axis value of each line with matplotlib

I'm drawing a graph with some lines using matplotlib and I want to display the final y value next to where each line ... , f, xs_, ys_, f_). See Question&Answers more detail:os...

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

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