Recent questions tagged Python

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python - Save the "Out[]" table of a pandas dataframe as a figure

This may seem to be a useless feature but it would be very helpful for me. I would like to save the ... have stated the question more clearly. See Question&Answers more detail:os...

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

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914 views

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python - Django ImageField upload_to path

I'm having trouble understanding and using Django's ImageField. I have a model: class BlogContent(models.Model): ... correct way to 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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576 views

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python - How to subtract rows of one pandas data frame from another?

The operation that I want to do is similar to merger. For example, with the inner merger we get a data frame that ... and elegant way to 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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140 views

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python - How to read datetime with timezone in pandas

I am trying to create a dataframe from csv, and its first column is like "2013-08-25T00:00:00-0400"; ... seperate the datetime from timezone ? See Question&Answers more detail:os...

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

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136 views

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python - ImportError: No module named vtkCommonPython

I am trying to install Python with VTK on my computer, but when I want to import VTK, I get an error: ... Can anyone help me with 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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403 views

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python - When to use SQLAlchemy .get() vs .filter(Foo.ID == primary_key_id).first()

Just curious about when I would want to use one vs the other. How are they different? We have our system set up ... = User.query().get(5) See Question&Answers more detail:os...

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

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1.4k views

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python - I am getting a warning <RuntimeWarning: invalid value encountered in sqrt>

I am trying to run a quadratic equation in python. However, it keeps on giving me a warning RuntimeWarning: invalid value ... (2 * a) print(x0) 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 - Generate random array of 0 and 1 with a specific ratio

I want to generate a random array of size N which only contains 0 and 1, I want my array to have some ... control the ratio between 0 and 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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475 views

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python - importError: no module named _winreg python3

Where can I download _winreg for python3 if I can at all. I have my 'windir' on E:Windows. I do not ... cx_Freeze to create an msi installer. See Question&Answers more detail:os...

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

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159 views

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python - Checking if List contains all items from another list

What is the easiest/fastest way to check if a list of tuples contains all the the tuples that another list does. ... . Is there a better way? See Question&Answers more detail:os...

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

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664 views

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python - Django 2.1.3 Error: __init__() takes 1 positional argument but 2 were given

I am trying to develop a website with Django 2.1.3 and python 3.7.1 When I go to the homepage I get ... include('django.contrib.auth.urls')) ] See Question&Answers more detail:os...

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

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133 views

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python - How to check if an object is pickleable

I have a list of objects of various types that I want to pickle. I would like to pickle only those which are ... it doesn't answer my question. 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 - Tensorflow TypeError: Fetch argument None has invalid type <type 'NoneType'>?

I'm building a RNN loosely based on the TensorFlow tutorial. The relevant parts of my model are as ... help would 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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141 views

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python - What does u'ufe0f' in an emoji mean? Is it the same if I delete it?

I'm writing a python program to judge emojis with a collected emoji Unicode set. During the test, I found that one ... the same if I delete 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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322 views

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python - AttributeError: 'Settings' object has no attribute 'ROOT_URLCONF'

Following on from my last question Error: No module named psycopg2.extensions, I have updated my mac OS to ... and get my localhost running? See Question&Answers more detail:os...

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

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827 views

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python - Reversed cumulative sum of a column in pandas.DataFrame

I've got a pandas DataFrame with a boolean column sorted by another column and need to calculate reverse ... using Pandas only yesterday. 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 - How to get all days in current month?

I want to get all datetime object of each day in the current month but I haven't done yet. The result ... me your ideas or suggestions. 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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229 views

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python - Flipping zeroes and ones in one-dimensional NumPy array

I have a one-dimensional NumPy array that consists of zeroes and ones like so: array([0, 0, 0, 0, 0, ... , but any help 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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301 views

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python - How to indent the contents of a multi-line string?

I'm using the python cog module to generate C++ boilerplate code, and it is working great so far, but my ... content of a multi-line 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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3.7k views

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python - SQLalchemy AttributeError: 'str' object has no attribute '_sa_instance_state'

I'm trying to add an item to my database with SQLAlchemy + Python, but keep getting an error. My ... right from the terminal though. See Question&Answers more detail:os...

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

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167 views

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python - Stop at the line where a variable gets changed

I am trying to track down when a variable gets updated. I have a watcher, but is there any way to set it ... a watchpoint or a data breakpoint. See Question&Answers more detail:os...

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

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445 views

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python - Django - enforcing ManyToManyField unique items

I'm trying to do something simple like this: members = models.ManyToManyField(User, blank=True, null=True, ... contained already before adding? See Question&Answers more detail:os...

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

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670 views

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python - Google API quickstart.py error KeyError: '_module'

Using Gmail API. My client secret file is downloaded and working for Ruby. When I try the quickstart.py ( ... .com/gmail/api/quickstart/python See Question&Answers more detail:os...

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

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947 views

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python - Error opening file in H5PY (File signature not found)

I've been using the following bit of code to open some HDF5 files, produced in MATLAB, in python using H5PY ... , thanks 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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576 views

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python - PyCharm: Py_Initialize: can't initialize sys standard streams

I'm trying to use PyCharm IDE but none of my programs compile even simple Hello World. PyCharm gives this error: ... on my Win 7 OS system. See Question&Answers more detail:os...

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

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137 views

1 answer

python - What is the difference between postgres and postgresql_psycopg2 as a database engine for django?

I have worked with python for a while, but never django. I am taking over a project that a different employee made ... 'PORT': '5432', }} 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 - py.test: how to get the current test's name from the setup method?

I am using py.test and wonder if/how it is possible to retrieve the name of the currently executed test ... upon creation of the resource. See Question&Answers more detail:os...

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

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174 views

1 answer

python - Why does base64.b64encode() return a bytes object?

The purpose of base64.b64encode() is to convert binary data into ASCII-safe "text". However, the method returns an ... bytes rather than a str? See Question&Answers more detail:os...

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

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