You can use df.iterrows() normally:
import pandas as pd
import numpy as np
# Assuming 'df' is your DataFrame
# For demonstration, let's create a sample DataFrame
dates = pd.date_range('2023-01-01', periods=5)
data = np.random.randn(5, 2)
df = pd.DataFrame(data, index=dates, columns=['A', 'B'])
# Iterating over rows
for index, row in df.iterrows():
print(f"Index: {index}, A: {row['A']}, B: {row['B']}")
Note that index is a pd.Timestamp.
import pandas as pd
import numpy as np
# Create a sample DataFrame with datetime index
dates = pd.date_range('2023-01-01', periods=10)
data = np.random.randn(10, 2)
df = pd.DataFrame(data, index=dates, columns=['A', 'B'])
# Timestamps to drop
timestamps_to_drop = [pd.Timestamp('2023-01-03'), pd.Timestamp('2023-01-05'), pd.Timestamp('2023-01-07'),
pd.Timestamp('2023-01-08'), pd.Timestamp('2023-01-10')]
# Drop rows
df_filtered = df.drop(index=timestamps_to_drop)
You want to update your snap, e.g. signal-desktop, but when you try to snap refresh it, you see the following error message:
Error: cannot refresh "signal-desktop": snap "signal-desktop" has running apps (signal-desktop),
pids: 471050,471137,471138,471189,471204,471248
You can’t stop the running apps via snap. Just kill them using killall, for example:
killall signal-desktop && sudo snap refresh signal-desktop
Alternatively, you can kill the PIDs listed in the error message (you need to separate them by space, not by comma):
kill 471050 471137 471138 471189 471204 471248
Inside the directory where you want to create the project, run
wget -qO- https://raw.githubusercontent.com/ulikoehler/KiCAD-ProcessAutomation/master/InitializeKiCad8Project.sh | bash /dev/stdin MyProject
You should replace MyProject (at the end of the command) with your project name.
Note: This will initialize an empty KiCAD project without any libraries. This is equivalent to creating a new project in KiCAD itself (using the GUI).
When trying to run a PySpice program, you see an error message such as
OSError: cannot load library 'libngspice.so': libngspice.so: cannot open shared object file: No such file or directory. Additionally, ctypes.util.find_library() did not manage to locate a library called 'libngspice.so'
Install libngspice, often called libngspice0.
On Ubuntu, install it using
sudo apt -y install libngspice0-dev
You need to install the -dev library since libngspice0 only contains libngspice.so.0 whereas the -dev library contains libngspice.so which is required by pyspice.
In the autogenerated main.c, use the following while() loop:
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */
HAL_GPIO_WritePin(LD1_GPIO_Port, LD1_Pin, GPIO_PIN_SET);
HAL_Delay(1000);
HAL_GPIO_WritePin(LD1_GPIO_Port, LD1_Pin, GPIO_PIN_RESET);
HAL_Delay(1000);
}
/* USER CODE END 3 */On STM32H7 Nucleo boards, this will toggle the green LED.
docker-compose exec nextcloud chown -vR www-data:www-data /var/www/html
Typically some 1N4001…1N4007 in SOD-123 or SOD-123FL package is the cheapest available diode. It is available from many manufacturers and at all distributors.
The typical rating is:
On LCSC, a full reel (3000pcs) of SOD4007-MS by MSKSemi costs just 6,60€
The 2N7002 or 2N7002K MOSFET is one of the best MOSFETs to use if you just want to have a general purpose switching FET.
It or its variants is available from many manufacturers and at all distributors.
On LCSC, for example, one reel of 2N7002 from chinese manufacturer HL, only costs 15.90€, that is 0,0053€/pc
JST SVH-21T-P1.1 contact, for inventory management etc.
This picture is my own work and hereby released under CC0-1.0-Universal.
Add these command line options:
-V geometry:margin=20mm
-V is short-form for --variable
This will configure the default LaTeX template to use
\usepackage[margin=20mm]{geometry}sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys E88979FB9B30ACF2
<app-my-component #myId></app-dynamic-plot>
@ViewChild('myid', {read: MyComponent}) myComponent!: MyComponent;
When compiling your Hugo page, you see an error message such as
ERROR render of "section" failed: "/home/uli/klc/themes/hugo-theme-techdoc/layouts/_default/list.html:3:4": execute of template failed: template: _default/list.html:3:4: executing "main" at <.Content>: error calling Content: "/home/uli/klc/content/footprint/F2/_index.adoc:1:1": access denied: "asciidoctor" is not whitelisted in policy "security.exec.allow"; the current security configuration is:
You need to edit your Hugo configuration file and add asciidoctor or whatever program caused the error, to the list of allowed programs to execute.
For TOML config files, add the following section which consists of the default value plus asciidoctor
[security]
[security.exec]
allow = ['^(dart-)?sass(-embedded)?$', '^go$', '^npx$', '^postcss$', '^asciidoctor$']
After that, recompile your Hugo page.
You want to use cache3‘s SafeCache as shown in the Quickstart
from cache3 import SafeCache cache = SafeCache()
but you instead see the following error message:
ImportError: cannot import name 'SafeCache' from 'cache3' (/usr/local/lib/python3.10/dist-packages/cache3/__init__.py)
cache3 has been updated, but the documentation still has not been fixed. This is a known bug.
The closest equivalent is Cache() with thread_safe=True, an in-memory cache which supports tagging:
from cache3 import Cache cache = Cache(name="mycache", thread_safe=True)
In case you don’t need tagging, consider MiniCache:
from cache3 import MiniCache cache = MiniCache(name="mycache", thread_safe=True)
When you try to run your PySpice script, you see an error log such as
PySpice.Spice.NgSpice.Shared.NgSpiceShared._send_char - WARNING - spinit was not found PySpice.Spice.NgSpice.Shared.NgSpiceShared._send_char - ERROR - Note: can't find init file. PySpice.Spice.NgSpice.Shared.NgSpiceShared._init_ngspice - WARNING - Unsupported Ngspice version 36
Your PySpice is too new for the ngspice version installed on your system.
Typically, it’s easiest to install a slightly older PySpice version:
sudo pip3 install -U "pyspice<1.5"
(but you can also update your ngspice).
python3 -c "import urllib.request; urllib.request.urlretrieve('https://bootstrap.pypa.io/get-pip.py', 'get-pip.py')"
python3 get-pip.py --break-system-packages
#!/bin/sh
export DIRECTORY=panel
export PROJNAME=MyProject
mkdir -p $DIRECTORY
kikit panelize \
--layout 'grid; rows: 4; cols: 2' \
--tabs 'full' \
--cuts 'vcuts ; layer: Edge.Cuts ; clearance: 0.4mm' \
--post 'millradius: 2mm' \
${PROJNAME}.kicad_pcb ${DIRECTORY}/${PROJNAME}.kicad_pcb
#!/bin/sh
export DIRECTORY=panel
export PROJNAME=MyPCB
mkdir -p $DIRECTORY
kikit panelize \
--layout 'grid; rows: 4; cols: 2; space: 2mm' \
--tabs 'fixed; width: 5mm' \
--cuts 'mousebites; drill: 0.5mm; spacing: 0.8mm; offset: -0.2mm' \
--post 'millradius: 1mm' \
${PROJNAME}.kicad_pcb ${DIRECTORY}/${PROJNAME}.kicad_pcb
You can use the UliEngineering library to compute the power lost to charging a particular MOSFET to a particular gate voltage a given number of times a second:
from UliEngineering.Electronics.MOSFET import mosfet_gate_charge_losses from UliEngineering.EngineerIO import auto_format auto_format(mosfet_gate_charge_losses, "31nC", "9V", "1MHz") # Prints '279 mW'