Recent questions tagged Python

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python - Matplotlib 3D Scatter Plot with Colorbar

Borrowing from the example on the Matplotlib documentation page and slightly modifying the code, import numpy as np from ... 't seem to 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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python - Fastest way to generate delimited string from 1d numpy array

I have a program which needs to turn many large one-dimensional numpy arrays of floats into delimited strings. ... of numbers to strings. 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 convert Spark RDD to pandas dataframe in ipython?

I have a RDD and I want to convert it to pandas dataframe. I know that to convert and RDD to a normal dataframe ... dataframe. How can I do 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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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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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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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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614 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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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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366 views

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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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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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558 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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493 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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877 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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471 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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454 views

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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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261 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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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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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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570 views

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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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318 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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842 views

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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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