Pendulum is a Python package to ease datetimes manipulation. It provides classes that are drop-in replacements for the native ones (they inherit from them).
Questions tagged [pendulum]
67 questions
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How do I create a timedelta with pendulum?
I'm looking for a way of creating an arbitrary timedelta compatible object with pendulum. Previously there was a pendulum.interval method but this seems to not exist in recent versions of pendulum.
So say I'd like a delta of five minutes: surely…
maxcountryman
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How to convert a python's datetime.tzinfo object to a pendulum's Timezone object?
I know I can convert a datetime.datetime to pendulums with
from datetime import datetime,timezone
import pendulum
a = datetime(2021,6,1,tzinfo=timezone.utc)
b = pendulum.instance(a)
b.tzinfo.name # the presence of the attribute 'name' means it's a…
RubenLaguna
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DateTime from Database (SqlAlchemy) not same timestamp like pendulum parsed date
I have pendulum parsed a date string:
pendulum.parse('2015-03-09')
This object is now stored to a SqlAlchemy database table (mysql) with Column(SqlAlchemy.DateTime)
Now, I load this column value, its then:
Now I want to compare it back with the…
Martin Fischer
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Numerical solution for a pendulum
I am having a trouble in providing a graphical representation of my system, which happens to be a harmonically driven pendulum. The problem is shown below for reference.
Problem
The source code I used is shown below using the Verlet Scheme.
#Import…
Rafael Gomez
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Adding a DC Motor to a Simscape Model
I want simulate an inverted pendulum via Simcape. For this, i created a Model with SolidWorks and tranformed it to Simscape. So far so good. Everything worked and my Simulation shows the predicted physical Behavior.
But now i want to add a dc motor…
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How can I animate a datafile in gnuplot?
I have a file with the coordinates (x1, y1), (x2, y2) of a double pendulum at an instant of time t. I would like to know how to animate this file.
n t x y
1. 0. 0.3435957874318018 -0.36323812418181006
2. 0. 0.3490554835456995…
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Google Cloud Composer DAG is not getting triggered
I'm scheduling a DAG to run at 04:00 AM, Tuesday through Saturday eastern standard time (NY) starting from today 2020/08/11. After writing up the code and deploying, I expected the DAG to get triggered. I refreshed my Airflow UI page a couple of…
comet
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Pendulum plot simulation Matplotlib - data from file
I have to create a pendulum simulation on plot. I have to read data from file, then only thing I have to solve is X and Y cords, what I did. It is specified that I am supposed to use "roll"/"pitch"/"yaw" columns and with one of them make a…
novacco
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What week of the month is it?
pendulum v2.1.0 on macOS
>>> import pendulum
>>> d = pendulum.Date(2019, 12, 31)
>>> d.week_of_month
-46
Isn't new years day 2019 the week 5 of the month?
How to interpret week of the month result negative 46?
COVFEFE-19
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Numerical Derivative in R?
I have generated some real data of the motion of a damping pendulum:
I took its derivative in R by taking the difference of consecutive points and dividing by difference in time. There are 1202 data points in this picture.
That gave this graph:
I…
KnowledgeWonder
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Problem with FuncAnimation to make a Matplotlib Pendulum Animation
The problem I am simulating is a simple pendulum. While I have done it before using PyGame I now decided to use matplotlib's animation tools. It is working but not with the desired effect. Simulating it in real time seems to be working. I have…
casiofx82
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Can't create exe with pycharm as it complains pendulum locales
I have a GUI application that will not package to an exe with pyinstaller.
When I run pyinstaller main.py --onefile --windowed I get the following error.
Traceback (most recent call last):
File "", line 2, in
ModuleNotFoundError:…
Finchy70
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Why the pendulum in openai gym has cos and sin feature? why not just use one of them?
Why the pendulum has cos and sin feature? Can I just use 1 of them? Or can I use theta (the angle) instead?
I expect some explanation for this XD, intuitive or theoretical ones are all welcome.
BayesFans
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How to calculate angle from velocity of moving pivot (pendulum)?
I am trying to simulate pendulum with moving pivot in processing.js. My question is, how to calculate angle at which my pendulum swing (while pivot is moving), based on pivot velocity? I searched all the web, but there angle is always known in…
Arashii
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Odd slowing effect on a double-pendulum animation with python tkinter
I am just getting started with python and tried to create a double-pendulum animation using tkinter. I am aware that because of my inexperience, I likely took a convoluted approach.
I have an error that I did not expect. It seems that the pendulum…
Robert Link
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