Dateien öffnen und lesen

Einführung

Grundlagen von open()

# f = open('data.txt', 'r')
# content = f.read()
# f.close()
print('open demo')

read()-Methode

# content = open('data.txt').read()
print('read demo')

readlines()

# lines = open('data.txt').readlines()
# for line in lines: print(line.rstrip())
print('readlines demo')

readline()

# f = open('data.txt')
# first = f.readline()
print('readline demo')

Zeilen direkt durchlaufen

# for line in open('data.txt'):
#     print(line.rstrip())
print('line iterator demo')

Encoding-Parameter

# f = open('data.txt', 'r', encoding='utf-8')
print('encoding demo')

Bestimmte Bytes lesen

# f = open('data.txt')
# chunk = f.read(100)
# f.seek(0)
print('seek demo')

tell()

# f = open('data.txt')
# f.read(5)
# print(f.tell())
print('tell demo')

Binärdateien lesen

# with open('image.png', 'rb') as f:
#     header = f.read(4)
print('binary read demo')

Dateien immer schließen

# f = open('data.txt')
# try:
#     content = f.read()
# finally:
#     f.close()
print('close demo')

Kurzer Test

Zusammenfassung

Weiter so