Recent questions tagged Python

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python - bulk insert list values with SQLAlchemy Core

I'd like to bulk insert a list of strings into a MySQL Database with SQLAlchemy Core. engine = create_engine("mysql+ ... , 'red', 'green']) 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 - Drawing a huge graph with networkX and matplotlib

I am drawing a graph with around 5K nodes in it using networkX and matplotlib. The GTK window by matplotlib ... =None, pad_inches=0.1) See Question&Answers more detail:os...

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

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python - Modify data as part of an alembic upgrade

I would like to modify some database data as part of an alembic upgrade. I thought I could just add any ... like this not a possibility? 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 - pip cffi package installation failed on osx

I am installing cffi package for cryptography and Jasmin installation. I did some research before posting question, so I ... --- Cleaning up... 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 - Customizing the separator in pandas read_csv

I am reading many different data files into various pandas dataframes. The columns in these datafiles are separated ... spaces as the separator? 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 - MissingSectionHeaderError: File contains no section headers

I am trying to build collective.simserver according to this manual, with some modifications: instead of: virtualenv -- ... What might be 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 - How to do "insert if not exist else update" with mongoengine?

I'm working with mongoengine in Django, this is my document defination: class Location(mongoengine.Document): ... statement with mongoengine? 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 - Numpy, the array doesn't have its own data?

I tried to use resize on an array in this way: a = np.array([1,2,3,4,5,6], dtype=np.uint8 ... .flags always before applying the resize method. 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 - Using files as stdin and stdout for subprocess

How do I replicate the following batch command using python subprocess module? myprogram < myinput.in > myoutput. ... .out as standard output? 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 - Convert a unixtime to a datetime object and back again (pair of time conversion functions that are inverses)

I'm trying to write a pair of functions, dt and ut, that convert back and forth between normal unix ... s date2num and num2date perfect inverses See Question&Answers more detail:os...

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

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391 views

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python - How to create an ec2 instance using boto3

Is it possible to create an ec2 instance using boto3 in python? Boto3 document is not helping here, and I ... provide some sample codes/links. See Question&Answers more detail:os...

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

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825 views

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python - Pandas reindex and fill missing values: "Index must be monotonic"

In answering this stackoverflow question, I found some interesting behavior when using a fill method while reindexing ... parameter to reindex. 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 - Run Function in the Background and Update UI

I am using PyQt to make a GUI for a project. Screenshot of GUI After inputting a number and submitting it, I ... , the GUI doesn't 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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410 views

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python - How to convert tomorrows (at specific time) date to a timestamp

How can i actually create a timestamp for the next 6 o'clock, whether that's today or tomorrow? I tried ... into a timestamp. Need your 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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563 views

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python - Is there an easy way to make a blocky insert cursor for the Tkinter Text widget?

The insert cursor of the Text widget doesn't seem to have a lot of options (just width, border, and ... more complex than changing an option? 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 - Matplotlib candlestick in minutes

Good afternoon, I would like to see if any of you could help me make a candle chart in minutes. I have ... ) plt.tight_layout() plt.show() 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 the most pythonic way to open a file?

I'm trying to clean up my code a little bit, and I have trouble figuring which of these 2 ways is considered the ... it adds a line of 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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680 views

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python - How to draw a line from mouse to a point in PyQt5?

Here is my code: import sys from PyQt5.QtWidgets import (QApplication, QLabel, QWidget) from PyQt5.QtGui import QPainter, ... do I need to do? See Question&Answers more detail:os...

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

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427 views

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python - How can i reduce memory usage of Scikit-Learn Vectorizers?

TFIDFVectorizer takes so much memory ,vectorizing 470 MB of 100k documents takes over 6 GB , if we go 21 million ... to work with Huge Corpus? 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 - Validate WTForm form based on clicked button

On my form, I have two buttons that I use for submitting the form. One button deletes selected files ( ... button was clicked here? pass See Question&Answers more detail:os...

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

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385 views

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python - Fetch results from BigQueryOperator in airflow

I am trying to fetch results from BigQueryOperator using airflow but I could not find a way to do it. I ... available way to fetch the results. See Question&Answers more detail:os...

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

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455 views

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python - change default color rotation matplotlib to specific colormap

I would like to change the standard color rotation of matplotlib to another colormap. To be specific, I would like to ... the right key to add. See Question&Answers more detail:os...

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

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319 views

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python - Why does Go's map iteration order vary when printing?

package main import "fmt" func main(){ sample := map[string]string{ "key1":"value1", "key2":"value2", "key3":" ... 'value2', 'key1': 'value1'}` 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 - Shared object between requests in Django

I am using a Python module (PyCLIPS) and Django 1.3. I want develop a thread-safety class which realizes ... Expert System Engine CLIPS. 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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429 views

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python - How to open download file dialog with QWebEngineView?

I'm building a pyqt5 desktop interface where I'm using QWebEngineView to show a html file where I show a Leaflet map ... script> </body> </html> See Question&Answers more detail:os...

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

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345 views

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python - How to use a Qthread to update a Matplotlib figure with PyQt?

I'm really having a hard time to understand how to use Threads in PyQt. I made a simple example of what I ... () 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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356 views

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python - Process vs. Thread with regards to using Queue()/deque() and class variable for communication and "poison pill"

I would like to create either a Thread or a Process which runs forever in a While True loop. I need to send ... some sort of stop() method. See Question&Answers more detail:os...

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

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828 views

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python - Takes exactly 3 arguments (4 given)

i'm refactoring code in order to add object orientation and am just testing the code. pattern = r"((([ ... (pattern, theline) else: pass See Question&Answers more detail:os...

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

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