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Questions tagged [pendulum]

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).

67 questions
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How to convert pendulum to datetime.datetime type?

In current part of system pendulum v1.4 is used, but with croniter it causing error described in https://github.com/sdispater/pendulum/issues/214 This works fine with datetime.datetime type and i still have to stay with pendulum v1.4. So i am…
esugei
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Making Pandas work with Pendulum

I've recently stumbled upon a new awesome pendulum library for easier work with datetimes. In pandas, there is this handy to_datetime() method allowing to convert series and other objects to datetimes: raw_data['Mycol'] =…
alecxe
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Not able to install pendulum on python3.7-alpine docker image

I'm trying to install pendulum 2.0.5 in a python37-alpine based docker image but it gives me the below error: Installing dependencies from Pipfile.lock (0157fa)… An error occurred while installing pendulum==2.0.5…
Anil Kumar
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airflow initdb: cannot import name 'Pendulum' from 'pendulum'

I installed airflow within one of my Anaconda envs named engdados. When I execute the command airflow initdb I'm getting the following error: airflow initdb: cannot import name 'Pendulum' from 'pendulum'. The full trace back is shown…
Guilherme Noronha
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did I just program a pendulum, or something that just *looks* like a pendulum?

i've spent some time trying to figure out how to simulate the motion of a pendulum, and i've got something that looks like its a pendulum, but i know that doesn't mean it is a pendulum! i realise the code isn't as clean as it could be but i'm fairly…
PumpkinBug
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URDF model keeps disappearing whenever I add intertial properties to a link? How can I resolve this issue?

I am trying to simulate a simple pendulum using pydrake and am having a couple of issues creating the urdf file to creat the model for the pendulum. I have no background knowledge on urdf or drake and am open to any suggestions to resolve this…
Raviverma Chamarti
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Oscillating Spring with Pymunk

I am trying to create a pendulum with oscillating string and mass which is expected to oscillate for a period of time and then stop. From what I wrote, the mass could not stop oscillating. Kindly help me out. import pyglet import pymunk …
TAYO
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Terminal Set and Terminal Cost using Gekko Library

I have a NMPC controller written in python using Gekko library for a nonlinear model of inverted pendulum mounted on the cart. I want to add terminal set and terminal cost using Gekko Library. This is how I defined the objective function in…
user2002
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Python pendulum module returning wrong week number

The way iam trying to get the week number import pendulum from datetime import date dt = pendulum.parse(str(date.today())) week = dt.week_of_month print(dt) print(week) Result 2023-01-19T00:00:00+00:00 -48 The week number is -48 here, please…
kalesh cv
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How to make pendulum swing due to gravity in Drake

I have been trying to simulate a simple pendulum that can swing due to gravity after setting the initial angle. I am now able to create the urdf, and create a slider that will set the angle of the pendulum arm. But I am still facing trouble when…
Raviverma Chamarti
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Scheduling Airflow DAGs to run exclusively Monday through Friday i.e only weekdays

I have a DAG executing a Python script which takes a date argument (the current date). I'm scheduling the DAG to run at 6:00 AM Monday through Friday i.e weekdays Eastern Standard Time. The DAG has to run the Python script on Monday with Mondays…
comet
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Plotting pendulum motion in python using trapezoid rule

I'm trying to plot how the angle θ and angular velocity ω vary with respect to time t for a linear and non-linear pendulum using the trapezoid rule to solve for the differential equations, but I'm having trouble generating the actual plot. This is…
Aran G
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OpenModelica inconsistent initial condistions for DAEs

I'm trying to use openmodelica to solve simple DAEs like for a planar pendulum. I am running into a simple problem that I don't now how to solve. I am imposing an initial condition for the x and y coordinate of the pendulum. x0 = 0.5 and y0 = 0…
Kas Visser
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Issues while running tutorials of Drake programs, in Underactuated Robotics document, in Deepnote?

I am trying to build and simulate a pendulum in drake. I have created a urdf file(still don't know how to add the inertia tags) and am trying to simulate it, but I don't know how to? So, I was looking at the simple pendulum tutorial in…
Raviverma Chamarti
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Airflow - Wrong timestamp inside DAG default_args

Airflow version 2.1.0 / Python version 3.6 Hello. I've realized whenever I try to create and schedule a DAG to run at a specific time in the day, the timestamp value is reset to UTC. I've noticed a strange behavior between the default_args and the…
Hilário Ferreira
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