Recent questions tagged Python

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I am trying to install pandas in my company computer. I tried to do pip install pandas but operation ... without any problem on explorer 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 - Plot point markers and lines in different hues but the same style with seaborn

Given the data frame below: import pandas as pd df = pd.DataFrame({ "n_index": list(range(5)) * 2, " ... 't like the looping way ofmatplotlib.) 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 - Tkinter AttributeError: object has no attribute 'tk'

I've looked around a bit, but I can't find an answer to my error. Here is the code: import tkinter ... really appreciate any help, 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 - Json dumping a dict throws TypeError: keys must be a string

I am attempting to convert the following dict into JSON using json.dumps: { 'post_engaged': 36, 'post_impressions ... elements from the dict? 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 run Keras on multiple cores?

I'm using Keras with Tensorflow backend on a cluster (creating neural networks). How can I run it in a multi- ... how many cores should be used? 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 - write() at beginning of file?

I'm doing it like this now, but I want it to write at the beginning of the file instead. f = open('out. ... does): string 1 string 2 string 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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python - How to parse positional arguments with leading minus sign (negative numbers) using argparse

I would like to parse a required, positional argument containing a comma-separated list of integers. If the first ... 3,4 as valid arguments? 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 doesn't unicodedata recognise certain characters?

In Python 2.7 at least, unicodedata.name() doesn't recognise certain characters. >>> from unicodedata ... KeyError: undefined character 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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python - protocol error setting up virtualenvironment through vagrant on ubuntu

I'm trying to set up a virtualenv on Ubuntu 12.04 with Python 2.7 using vagrant but having same issues. ... OSError: [Errno 71] Protocol error 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 - PIL: ImportError: The _imaging extension was built for another version of pillow or PIL

I get the error: ---------------------------------------------------------- ... , without any change in the output. Help is much 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 - Multiple figures in a single window

I want to create a function which plot on screen a set of figures in a single window. By now I write ... subplot but it looks quite tricky. 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 not to miss the next element after itertools.takewhile()

Say we wish to process an iterator and want to handle it by chunks. The logic per chunk depends on previously ... is there an elegant 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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python - Memory profiler for numpy

I have a numpy script that -- according to top -- is using about 5GB of RAM: PID USER PR NI VIRT ... those already mentioned in this thread)? 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 - MySQL error: 2013, "Lost connection to MySQL server at 'reading initial communication packet', system error: 0"

I'm having an issue connecting to my local MySQL database using Python's MySQLdb library. The script has been working ... ', system error: 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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python - How do I correctly add type-hints to Mixin classes?

Consider the following example. The example is contrived but illustrates the point in a runnable example: class ... could be properly hinted. See Question&Answers more detail:os...

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

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737 views

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python - Increment counter for every access to a Flask view

I want to increment a counter when users access a page in my Flask app. If two users access the page, the ... + 1 return jsonify(count=value) 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 - Removing JSON property in array of objects

I have a JSON array that I'm cleaning up in Python. I want to remove the imageData property: data.json ... correct to get this working properly? See Question&Answers more detail:os...

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

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328 views

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python - Compiler problems with pip during numpy install under Windows 8.1, 7 Enterprise and 7 Home Editions

I am unable to install numpy via pip install numpy on my computer running Python 3.4 due to various errors I ... and I cut them for readability. See Question&Answers more detail:os...

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

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470 views

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python - How to compute cumulative sum of previous N rows in pandas?

I am working with pandas, but I don't have so much experience. I have the following DataFrame: A 0 NaN 1 0. ... sum. How can I achieve 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 - PostgreSQL: how to install plpythonu extension

I'm running PostgreSQL 9.3.1 on Ubuntu 12.04.4. I'd like to use the plpython language extension but I ... the extension work? 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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331 views

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python - Anaconda not finding my packages installed with `pip`

I'm new to Anaconda version of Python, and already I'm running into unpleasant problems. I installed Anaconda per ... knows where to find them? 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 type hint a filename in a function?

What is a best way in Python to hint a filename, so that it's acceptable to pass anything into a function that ... ) as f1: # do something 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 - How to set QWidget background color?

The line w.setBackgroundRole(QPalette.Base) in the code below has no effect. Why? How do I fix that? import sys from ... ) w.show() app.exec_() 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 - Surface and 3d contour in matplotlib

I would like to plot a surface with a colormap, wireframe and contours using matplotlib. Something like this: ... is not necessary, 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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python - best way to implement custom pretty-printers

Customizing pprint.PrettyPrinter The documentation for the pprint module mentions that the method PrettyPrinter.format is ... there somewhere. See Question&Answers more detail:os...

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

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468 views

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python 3.x - How to see progress of Dask compute task?

I would like to see a progress bar on Jupyter notebook while I'm running a compute task using Dask, I'm counting ... ') df.id.count().compute() 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 - pytz: Why is normalize needed when converting between timezones?

I'm reading the not so complete pytz documentation and I'm stuck on understand one part of it. Converting ... when not using normalize. 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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185 views

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python - Replace values of a numpy index array with values of a list

Suppose you have a numpy array and a list: >>> a = np.array([1,2,2,1]).reshape(2,2) >>> a array([[1, 2 ... is 514 by 504 and of the list is 8. See Question&Answers more detail:os...

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

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