Recent questions tagged Python

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python - UnicodeEncodeError: 'cp949' codec can't encode character 'u20a9' in position 90: illegal multibyte sequence

I'm a python beginner. I'm trying to crawl google play store and export to csv file. But I got a ... w.writeheader() w.writerow(app_details) 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 - Scrapy not crawling subsequent pages in order

I am writing a crawler to get the names of items from an website. The website has got 25 items per page ... the former page is stored again. 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 - Avoiding long constructors while inheriting without hiding constructor, optional arguments or functionality

I have a particular problem, but I will make the example more general. I have a Parent class with a ... to solve this constructor 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 - ElementTree SyntaxError: expected path separator ([)

I've searched extensively for the past few days and can't seem to find what I'm looking for. I've written a ... be a real pain?... 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 - cannot read ascii character 26?

I wrote a stream in a file in text mode. # python code f = open("somewhere in my computer","w") f.write ... ? (I try this in Microsoft windows). 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 - Use Dash (plot.ly) in PyQt5 GUI

I am running into a problem while trying to create a dashboard with Dash (plotly), while using a GUI created with ... () sys.exit(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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578 views

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python - ttk.Separator set the length/width

How to set/change the length/width of a ttk.Separator object in Tkinter? ttk.Separator(self, orient=' ... myTestFrame() testFrame.mainloop() 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 - pandas count values in each column of a dataframe

i'm lookng to find a way to count the number of values in a column and its proving trickier than i originally thought. ... 0 0 none: 0 1 0 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 to print z3 solver results print(s.model()) in order?

Suppose I have a list of 10 variables v = [Real('v_%s' % (i+1)) for i in range(10)] and I want to ... have this kind of function or not? 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 - Get the duplicate value on DuplicateKeyError

In pymongo, when a DuplicateKeyError caught, what's the proper way to find out the duplicate value behind the ... one is the duplicate 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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735 views

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python - multiprocessing: variable being referenced before assignment in some cases but not others

I found the following example on this website somewhere: import multiprocessing import ctypes import numpy as np ... I cannot do that? See Question&Answers more detail:os...

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

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723 views

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python - Accessing CPU/RAM usage (like with Task Manager, but via API!)?

Is there a specific way to access "task manager" information with the Windows API? I have done a fair bit of ... print x.name print y.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 - Docstring inheritance for properties using sphinx's autodoc

I have a class like this: class MyBase(object): x = 3 """Documentation for property x""" and another class ... way to do this with properties? See Question&Answers more detail:os...

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

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543 views

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python - Need classic mapper example for SqlAlchemy single table inheritance

I found an example of how to do single table inheritance using Class mappings. http://docs.sqlalchemy.org/en ... or otherwise employee)? 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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571 views

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python - Why does PyQt sometimes crash on exit?

The given code below displays a QMainWindow with 4 QGraphicsView to draw with the mouse in it. It works as intended, ... /> <connections/> </ui> See Question&Answers more detail:os...

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

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457 views

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python - pandas.read_csv can't import file with accent mark in path

I am developing an application with Python and a QT GUI. I need to import a file to a DataFrame. I ... Any recommendation to solve 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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556 views

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python - asyncio: why isn't it non-blocking by default

By default, asyncio runs coroutines synchronously. If they contain blocking IO code, they still wait for it to ... feature than http requests. See Question&Answers more detail:os...

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

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524 views

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python - Calculate numpy.std of each pandas.DataFrame's column?

I want to get the numpy.std of each column of my pandas.DataFrame. Here is my code: import pandas as pd ... keyword argument 'dtype' 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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733 views

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python - something like plt.matshow but with triangles

Basically, I'd like to make something like the following (triangles not squares as is typically used with plt. ... idea about the plotting... See Question&Answers more detail:os...

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

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558 views

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python - How to select dataframe columns with lists and ranges combined

Please consider this df: df = pd.DataFrame({'a':[1,2], 'b':[1,2], 'c':[1,2], 'd':[1, ... ] ValueError: setting an array element with a sequence. See Question&Answers more detail:os...

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

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474 views

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python - How to correctly define a function?

In python I'm trying to do the following to define a function: count_letters(word) = count_vowels(word) + ... I fix it? 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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761 views

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python - Using SWIG with pointer to function in C struct

I'm trying to write a SWIG wrapper for a C library that uses pointers to functions in its structs. I can't ... my_func(1) to return 2? 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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543 views

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python - Error when installing keras in anaconda. /p KERAS_BACKEND= 0<temp.txt

I was creating a new env in anaconda and after installing spyder, tensorflow and theano I attempted to install keras but ... " 1>nul 2>&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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478 views

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python - Writing to module-wide variable

Lets say I have these 3 (tiny) python files - a.py myvar = 'a' b.py import a import c myvar = ' ... myvar can be assigned a different 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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443 views

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python - Creating and assigning different variables using a for loop

So what I'm trying to do is the following: I have 300+ CSVs in a certain folder. What I want to do is ... t been able to find clear answers on! See Question&Answers more detail:os...

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

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577 views

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python - How does numpy argmax work?

So I know that the numpy argmax retrieves the maximum value along an axis. Thus, x = np.array([[12,11, ... the integer values inside the array. See Question&Answers more detail:os...

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

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644 views

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python - How to run nested, hierarchical pathos multiprocessing maps?

Having build a significant part of my code on dill serialization/pickling, I'm also trying to use pathos ... correct in all corner cases. 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 - How to add annotation to a gene in SBML?

I have a genome-scale stoichiometric metabolic model iMM904.xml and when I open it in a text editor I can see ... by and actual notes to it? See Question&Answers more detail:os...

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

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