Recent questions tagged Python

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python - passing data to subprocess.check_output

I want to invoke a script, piping the contents of a string to its stdin and retrieving its stdout. I don't ... object has no attribute 'fileno' 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 - what is {% block content %} and {% endblock content %} for in Django?

so I just started reading a book on Django (for beginners) and I came across the following code snipet: <header ... you very much 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 - Pass Variable On Import

Let's say you have some time-consuming work to do when a module/class is first imported. This functionality is dependent on ... ,2,3,4]) 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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python - Reset ipython kernel

I was wondering if there is a way to restart the ipython kernel without closing it, like the kernel restart ... seem to clear the imports. 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 - django i18n: Make sure you have GNU gettext tools

I try django-admin.py makemessages -l zh_CN but has error : CommandError: Can't find msguniq. Make sure you ... Please guide me 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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351 views

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python - Relevance of typename in namedtuple

from collections import namedtuple Point = namedtuple('whatsmypurpose',['x','y']) p = Point(11,22) print ... relevance/use of 'whatsmypurpose'? 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 a new column in Data Frame derived from other columns (Spark)

I'm using Spark 1.3.0 and Python. I have a dataframe and I wish to add an additional column which is derived ... How do I do this in PySpark? 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 - Making a chart bigger in size

I'm trying to get a bigger chart. However, the figure method from matplotlib does not seem to be working properly ... What's wrong with my code? 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 - Django set range for integer model field as constraint

I have a django model, class MyModel(models.Model) qty = model.IntegerField() where I want to set constraint for ... way to do this in Django? See Question&Answers more detail:os...

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

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318 views

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python - Why use contextlib.suppress as opposed to try/except with pass?

Why would one use contextlib.suppress to suppress an exception, instead of try/except with a pass? There is no ... "") 0.10141028937128027 >>> 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 - Number of lines in csv.DictReader

I have a csv DictReader object (using Python 3.1), but I would like to know the number of lines/rows ... Any help would be appreciated. Alan See Question&Answers more detail:os...

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

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660 views

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python - Coverage.py warning: No data was collected. (no-data-collected)

I am trying to find the coverage using coverage module for a django project but gets Coverage.py warning: No ... am missing some path setting? 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 get a list of the symbols in a sympy expression?

For example, if I run import sympy x, y, z = sympy.symbols('x:z') f = sympy.exp(x + y) - ... ")), but obviously these are expression-specific. See Question&Answers more detail:os...

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

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344 views

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python - Cython Numpy warning about NPY_NO_DEPRECATED_API when using MemoryView

I am converting a Cython memoryview to a numpy array (to be able to use it in pure Python code): from libc. ... , cleaner/safer way of doing 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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617 views

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python - ImportError: No module named 'xlrd'

I am currently using PyCharm with Python version 3.4.3 for this particular project. This PyCharm previously ... site-packages" Any suggestion? See Question&Answers more detail:os...

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

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338 views

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python - AttributeError: 'tuple' object has no attribute

I'm a beginner in python. I'm not able to understand what the problem is? def list_benefits(): s1 = "More ... ' object has no attribute 's1' See Question&Answers more detail:os...

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

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835 views

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python - Tensorflow Data Adapter Error: ValueError: Failed to find data adapter that can handle input

While running a sentdex tutorial script of a cryptocurrency RNN, link here YouTube Tutorial: Cryptocurrency- ... be greatly 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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437 views

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python - How to change the legend edgecolor and facecolor in matplotlib

Is there while rcParams['legend.frameon'] = 'False' a simple way to fill the legend area background with a ... frame only, not the background. 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 does Django make migrations for help_text and verbose_name changes?

When I change help_text or verbose_name for any of my model fields and run python manage.py ... previous migration automatically? See Question&Answers more detail:os...

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

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213 views

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python - How to obtain values of parameters of get request in flask?

The answer that I found on the web is to use request.args.get. However, I cannot manage it to work. I ... application. What am I doing wrong? See Question&Answers more detail:os...

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

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265 views

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python - Sorting by arbitrary lambda

How can I sort a list by a key described by an arbitrary function? For example, if I have: mylist = [["quux", 1, ... : x[1]) how can I do 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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327 views

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python - Can I get PyCharm to suppress a particular warning on a single line?

PyCharm provides some helpful warnings on code style, conventions and logical gotchas. It also provides a ... convention strongly preferable.) 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 TRUNCATE TABLE using Django's ORM?

To empty a database table, I use this SQL Query: TRUNCATE TABLE `books` How to I truncate a table using ... t work: Book.objects.truncate() See Question&Answers more detail:os...

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

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285 views

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python - Convert Pandas dataframe to csv string

Here is an example of what I am trying to get: I have: import pandas as pd df = pd.DataFrame({'A' ... . Am I missing a simpler 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 - How to loop through multiple URLs to scrape from a CSV file in Scrapy?

My code for scrapping data from alibaba website: import scrapy class IndiamartSpider(scrapy.Spider): name = 'alibot' ... in the code at once? See Question&Answers more detail:os...

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

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419 views

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python 3.x - How can we plot accuracy and loss graphs from a Keras model saved earlier?

Is there a way to plot accuracy and loss graphs from the CNN model saved earlier? Or can we only plot graphs ... 0) model.save('model.h5') See Question&Answers more detail:os...

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

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390 views

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python - How can I change the styles of pandas DataFrame headers?

I have the following Python script which generates a HTML table. Now I want to change some styles of the table, but I ... </tr></tbody> </table> See Question&Answers more detail:os...

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

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294 views

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python - Using a custom object in pandas.read_csv()

I am interested in streaming a custom object into a pandas dataframe. According to the documentation, any object ... find some similar approach. See Question&Answers more detail:os...

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

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