Recent questions tagged Python

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python - Global variables in Flask templates

Probably not the accurate title since i am new to flask/python. I am working on an internal tool which will ... any better approach to 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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169 views

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python - find position of a substring in a string

i am having a python string of format mystr = "hi.this(is?my*string+" here i need to get the position of 'is ... in a string? using python 2.7 See Question&Answers more detail:os...

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

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134 views

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python - How do i add two lists' elements into one list?

For example, I have a list like this: list1 = ['good', 'bad', 'tall', 'big'] list2 = ['boy', 'girl', 'guy' ... (in this case, 4*4 = 16 of 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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913 views

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python - pandas read excel values not formulas

Is there a way to have pandas read in only the values from excel and not the formulas? It reads the ... read values from excel with pandas? 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 is the subprocess.Popen argument length limit smaller than what the OS reports?

I am running Python 3.4.3 on Linux 3.16.0. I want to use subprocess.Popen to run a command with a long ... the Python limit? If so, 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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python - Unable to query a local variable in pandas 0.14.0

I can query an explicit value: fills.query('Symbol=="BUD US"') Now I want to query a variable: In [40]: ... The dtype is object, if that helps. See Question&Answers more detail:os...

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

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408 views

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python - How do you alter the size of a Pytorch Dataset?

Say I am loading MNIST from torchvision.datasets.MNIST, but I only want to load in 10000 images total, how would ... , num_workers=4, **kwargs) See Question&Answers more detail:os...

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

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358 views

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python - Getting PIL/Pillow 4.2.1 to upload properly to AWS Lambda Py3.6

Background I have been struggling for the past few days to deploy a Lambda that uses Pillow, and I ... generic resources would be 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 - How to access class-scope variables without self?

So I have a class, which I'm using as a local namespace. I have some static functions in the class, ... ' is not defined Any thoughts? See Question&Answers more detail:os...

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

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858 views

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python - asyncio.Semaphore RuntimeError: Task got Future attached to a different loop

When I run this code in Python 3.7: import asyncio sem = asyncio.Semaphore(2) async def work(): async ... pending> attached to a different loop See Question&Answers more detail:os...

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

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176 views

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python - Check if list contains only item x

Say all of w, x, y, and z can be in list A. Is there a shortcut for checking that it contains only x ... single values (not lists, tuples, 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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168 views

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python - Pandas groupby and make set of items

I am using pandas groupby and want to apply the function to make a set from the items in the group. The ... why the first does not work? See Question&Answers more detail:os...

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

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355 views

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python - Pip install pygraphviz fails: Failed building wheel for pygraphviz

I have troubles installing pygraphviz on macOS 10.10.5. I have a fully functional installation of Python 2.7.x, and I'd like ... , 'open', open)(__file__).read().replace(' ', '...

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

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227 views

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python - pandas ValueError: numpy.dtype has the wrong size, try recompiling

I took a new clean install of OSX 10.9.3 and installed pip, and then did pip install pandas pip install ... and get pandas to load 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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125 views

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python - Difference between list(numpy_array) and numpy_array.tolist()

What is the difference between applying list() on a numpy array vs. calling tolist()? I was checking the types ... type: 'type 'list'' See Question&Answers more detail:os...

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

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376 views

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python - BeautifulSoup - adding attribute to tag

Question for you here, I'm trying to add an attribute to a tag here, wondering if I can use a BeautifulSoup ... </option> Thanks for the help! See Question&Answers more detail:os...

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

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132 views

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python - the strange arguments of range

The range function in python3 takes three arguments. Two of them are optional. So the argument list looks like: [ ... like the built-in range. See Question&Answers more detail:os...

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

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396 views

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python 3.x - TypeError: can't pickle _thread.lock objects in Seq2Seq

I'm having trouble using buckets in my Tensorflow model. When I run it with buckets = [(100, 100)], it ... : can't pickle _thread.lock objects See Question&Answers more detail:os...

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

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1.7k views

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python - ModuleNotFoundError: No module named 'pyodbc' when importing pyodbc into py script

I've written a short python script which tries to import the pyodbc extension package so I can access my SQL ... folder/directory as python.exe? See Question&Answers more detail:os...

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

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343 views

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python - Displaying dictionary data in Sphinx documentation

I have a dictionary in Python project source code which describes default configuration values. The dictionary ... pretty printing 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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531 views

1 answer

python - why __getitem__ cannot be classmethod?

Suppose following class: class Class(object): @classmethod def getitem(*args): print 'getitem %s' % (args, ... magic there behind __getitem__ ? See Question&Answers more detail:os...

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

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1.5k views

1 answer

python - PySpark — UnicodeEncodeError: 'ascii' codec can't encode character

Loading a dataframe with foreign characters (???) into Spark using spark.read.csv, with encoding='utf-8' and ... and the show()-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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237 views

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python socket object accept time out

Question: Is there some sort of time out or interrupt to the socket.accept() function in python? Info: I ... something connect to it first? See Question&Answers more detail:os...

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

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300 views

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python - Interactive matplotlib using ipywidgets

I want to implement an interactive plot using Matplotlib and ipywidgets in IPython (python3). So, how I can do ... .draw() interact(update); See Question&Answers more detail:os...

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

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252 views

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python - How do I serve media files in a local Django environment?

I can upload an image through the admin page, but the image can not be found when I navigate ... clean(self): validate_only_one_instance(self) See Question&Answers more detail:os...

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

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434 views

1 answer

python - How to set timeout for urlfetch in Google App Engine?

I'm trying to have Django (on top of GAE) fetch data from another web service. I'm often hit with error like ... how can I set a longer timeout? See Question&Answers more detail:os...

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

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430 views

1 answer

python 3.x - TypeError: list indices must be integers or slices, not list

array = some kind of list with 3 columns and unlimited amount of rows with data inside of it. Volume = array[0] ... line a problem? counter += 1 See Question&Answers more detail:os...

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

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604 views

1 answer

python - Truncating decimal digits numpy array of floats

I want to truncate the float values within the numpy array, for .e.g. 2.34341232 --> 2.34 I read the ... need output as a float not string. See Question&Answers more detail:os...

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

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