Recent questions tagged Python

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python - Grouping 2D numpy array in average

I am trying to group a numpy array into smaller size by taking average of the elements. Such as take average ... an efficient way to do that? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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131 views

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python - Remove a single row from a csv without copying files

There are multiple SO questions addressing some form of this topic, but they all seem terribly inefficient for ... copying the entire file. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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139 views

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python - Duplicate row based on value in different column

I have a dataframe of transactions. Each row represents a transaction of two item (think of it like a ... transform into three duplicate rows. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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489 views

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python - numpy subtract/add 1d array from 2d array

I have the following 2D-array: a = array([[ 1, 2, 3], [ 4, 5, 6], [ 7, 8, 9], [10, 11, ... or similar but there should be a direct way. Thanks See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Remove duplicates from a dataframe in PySpark

I'm messing around with dataframes in pyspark 1.4 locally and am having issues getting the dropDuplicates method ... df1.dropDuplicates().show() See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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853 views

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python - 'numpy.float64' object is not iterable

I'm trying to iterate an array of values generated with numpy.linspace: slX = numpy.linspace(obsvX, flightX, ... to break, and possible fixes? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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851 views

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python - mod_wsgi: ImportError: No module named 'encodings'

I'm using Apache 2.2.15 on CentOS 6.5. I'm trying to set up a Django app using mod_wsgi. I'm using a ... don't know where to go from here. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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140 views

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python - sort pandas dataframe based on list

I would like to sort the following dataframe: Region LSE North South 0 Cn 33.330367 9.178917 1 Develd -36.157025 ... way to do this in pandas? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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206 views

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python - pytesseract-no such file or directory error

I am using Ubuntu 14.04. I have the following code: import Image import pytesseract im = Image.open('test.png' ... .What could be the problem?? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - ValueError: Output tensors to a Model must be the output of a TensorFlow `Layer`

I'm building a model in Keras using some tensorflow function (reduce_sum and l2_normalize) in the last layer while ... on how to fix it? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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471 views

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python - pandas filling nans by mean of before and after non-nan values

I would like to fill df's nan with an average of adjacent elements. Consider a dataframe: df = pd. ... Any help is greatly appreciated! See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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774 views

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python - Multiple lines of x tick labels in matplotlib

I'm trying to make a plot similar to this excel example: I would like to know if there is anyways to ... to shift the two levels independently. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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135 views

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python - OpenCV mat::convertTo in python

Is there any function in the OpenCV python wrapper that does the same thing as Mat's convertTo method in OpenCV ... as possible. Any clues? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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169 views

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python - Know the depth of a dictionary

Supposing we have this dict: d = {'a':1, 'b': {'c':{}}} What would be the most straightforward way of knowing the nesting depth of it? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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216 views

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python - Detect repetitions in string

I have a simple problem, but can't come with a simple solution :) Let's say I have a string. I want to detect ... "testblblblblb" # => ("bl",4) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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247 views

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python - How to prevent short-circuit evaluation?

This is a problem that occurred to me while working on a Django project. It's about form validation. In Django ... solve this kind of problem. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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329 views

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python - Rounding to significant figures in numpy

I've tried searching this and can't find a satisfactory answer. I want to take a list/array of numbers and round ... 25e-15, 1.22e-3 ] Thanks See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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201 views

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python sqlalchemy label usage

I know I can use the label method for alias, but I can't figure out how to use the labeled element later ... was just for easy comprehension...) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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296 views

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python - How can I more easily suppress previous exceptions when I raise my own exception in response?

Consider try: import someProprietaryModule except ImportError: raise ImportError('It appears that <someProprietaryModule> is not ... might I do? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.6k views

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python - json.dumps messes up order

I'm working with the json module creating a json file containing entries of the like json.dumps({"fields": { ... to keep the given order? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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335 views

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python - TypeError: can only concatenate list (not "str") to list

I am trying to make an inventory program to use in an RPG. The program needs to be able to add and ... this, it would be greatly appreciated. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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182 views

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python - Does enumerate() produce a generator object?

As a complete Python newbie, it certainly looks that way. Running the following... x = enumerate(['fee', ... will immediately know the answer. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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368 views

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python - Invert an axis in a matplotlib grafic

How can I invert the y_axis? Z is a np.array.Thank you Z=TempLake X,Y=np.meshgrid(range(Z.shape[0]+1),range( ... () I have this: I need this: See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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265 views

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python - pip is showing error 'lsb_release -a' returned non-zero exit status 1

I am trying to install packages using pip and it is throwing error. Command that I have used, sudo pip install ... .04 LTS and python 2.X See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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839 views

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python - name 'times' is used prior to global declaration - But IT IS declared!

I'm coding a small program to time and show, in a ordered fashion, my Rubik's cube solvings. But Python (3) ... new in the world of Python :) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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313 views

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python - Is it possible to express a platform-specific dependency in setup.py without building platform-specific versions of my egg?

We have a placeholder egg that contains no code and only exists for the sake of pulling down a list of dependent ... to fail if they are not? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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370 views

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python - Can subprocess.call be invoked without waiting for process to finish?

I'm currently using subprocess.call() to invoke another program, but it blocks the executing thread until that ... without waiting for return? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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284 views

1 answer

python - unzipping file results in "BadZipFile: File is not a zip file"

I have two zip files, both of them open well with Windows Explorer and 7-zip. However when i open them with ... rb' at 0x045D4F98>, start: 4073 See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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