Programmierung

Python

* notes and tips for updating from Python 2 to Python 3 https://pymotw.com/3/porting_notes.html
* https://docs.python.org/3.1/library/index.html#library-index
* https://py-tutorial-de.readthedocs.io/de/latest/index.html
* https://www.w3schools.com/python/default.asp
* https://www.python-kurs.eu/python3_kurs.php
* https://www.python-kurs.eu/python3_skript_ausfuehren.php Python3 Tutorial
* https://binged.it/2YE2G96  Pyton QT Raspberry
* SELF Explained https://pythontips.com/2013/08/07/the-self-variable-in-python-explained/

tkinter

* Grafik mit tkinter https://pythonbasics.org/tkinter/
* http://effbot.org/tkinterbook/tkinter-index.htm#class-reference
* https://tkdocs.com
* https://pythonbasics.org/tkinter_scale/
* Raspi GUI TKinter  https://docs.python.org/3/library/tkinter.html#a-simple-hello-world-program

Diverse

• Online Progamming IDE verschiedenste Sprachen Java ,c c++ etc free
• Online-JAVA-Compiler free
• KISS_(Zufallszahlengenerator)

C

• A computer science portal for geeks
• C-Programmierung Wikibooks
• C-Programmierung allgemein
• PIC C XC8 Tutorial
• C-programmierung
• Ringpuffer
• C-Tutorial
• Das C Tutorial (deutsch)
• Fundamentals of the C Programming Language

MYSQL

Escape 
Sequence    Character Represented by Sequence
  \0         An ASCII NUL (0x00) character.
  \'         A single quote (“'”) character.
  \"         A double quote (“"”) character.
  \b         A backspace character.
  \n         A newline (linefeed) character.
  \r         A carriage return character.
  \t         A tab character.
  \Z         ASCII 26 (Control+Z).
  \\         A backslash (“\”) character.
  \%         A “%” character. 
  \_         A “_” character.