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termin 09
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| import os # operation system | |
| #https://docs.python.org/3/library/os.html | |
| # os.path.join | |
| # zugriff auf datei "rex.jpg" im Ordner "Hund": | |
| # unter linux und macOS: folder/file | |
| # unter windows: folder\file | |
| # os.path.join wählt immer das richtige Verbindungszeichen | |
| dateiname = os.path.join("Hund", "rex.jpg") | |
| # os.name .. zeight betriebssystem an | |
| print("Betriebsystem:", os.name) | |
| # os.getcwd() ... zeigt current work directory | |
| print(os.getcwd()) | |
| # os.walk ... durchsucht (rekursiv!) dateien und ordner | |
| #for root, dirs, files in os.walk('.'): | |
| # #print(root, dirs, files) | |
| # print("============================") | |
| # print("derzeit:", root) | |
| # print("=============================") | |
| # print("---- (unter)verzeichnisse: ----") | |
| # for d in dirs: | |
| # print(d) | |
| # print("----- Dateien ----") | |
| # for file in files: | |
| # print(file) | |
| # input("bitte enter drücken") | |
| # pathlib | |
| import pathlib | |
| for root, dirs, files in pathlib.Path(".").walk(): | |
| print("======root ist: ===========================") | |
| print(root) | |
| print("===========================================") | |
| print("---------- folders: ---------------") | |
| for d in dirs: | |
| print(d) | |
| print("- - - - - - files - - - - - - - ") | |
| for f in files: | |
| print(f) | |
| print("-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.") | |
| input("Enter drücken") | |
| # os.call ... ruft ein anderes Programm direkt vom Betriebssystem auf (z.B. calc.exe ) | |
| # bessere Alternative subprocess | |
| import subprocess | |
| subprocess.call("pluma") # started (im Labor) den Editor pluma | |
| # sys ... System | |
| import sys #https://docs.python.org/3/library/sys.html | |
| # liste der argumente ... das erste argument ist immer der | |
| # python-filename | |
| # die elemente der Liste sind immer strings | |
| # bsp: programm starten mit python termin09_001.py abc 123 | |
| print("sys.argv ist", sys.argv) | |
| #sys.exit() # beendet ein programm sofort | |
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