fp = open("../uebungen/salaries.txt", encoding="utf-8")
content = fp.read()
print(type(content))

<class 'str'>

fp = open("../uebungen/salaries.txt", "rb")
content = fp.read()
print(type(content))
text = content.decode("utf-8")
print(type(text))

<class 'bytes'>
<class 'str'>

fp = open("../uebungen/salaries.txt", mode="r")
line = fp.readline()
print(repr(line))

'Anna: 2000\n'

fp = open("../uebungen/salaries.txt", mode="r", encoding="utf-8")
while True:
    line = fp.readline()
    if not line:
        break
    print(line, end="")

Anna: 2000
Mark: 3000
Judith: 3500
Thomas: 2500
Barbara: 3000
Elke: 3300
Michael: 2800
Johann: 2000

fp = open("../uebungen/salaries.txt", mode="r", encoding="utf-8")
lines = fp.readlines()
print(type(lines))
print(lines)

<class 'list'>
['Anna: 2000\n', 'Mark: 3000\n', 'Judith: 3500\n', 'Thomas: 2500\n', 'Barbara: 3000\n', 'Elke: 3300\n', 'Michael: 2800\n', 'Johann: 2000\n']

fp = open("../uebungen/salaries.txt", mode="r", encoding="utf-8")
for line in fp:
    print(line, end="")

Anna: 2000
Mark: 3000
Judith: 3500
Thomas: 2500
Barbara: 3000
Elke: 3300
Michael: 2800
Johann: 2000

fp = open("../uebungen/salaries.txt", mode="r", encoding="utf-8")
for line in fp:
    print(line, end="")

fp.close()

Anna: 2000
Mark: 3000
Judith: 3500
Thomas: 2500
Barbara: 3000
Elke: 3300
Michael: 2800
Johann: 2000

lines = open("../uebungen/salaries.txt", encoding="utf-8").readlines()

with open("../uebungen/salaries.txt") as fp:
    for line in fp:
        print(line, end="")

Anna: 2000
Mark: 3000
Judith: 3500
Thomas: 2500
Barbara: 3000
Elke: 3300
Michael: 2800
Johann: 2000

# Pseudo Code! Nicht ausführbar
fp = open("../uebungen/salaries.txt")
ctx = new_context(fp)
fp.open_context(ctx)
# code block
fp.end_context(ctx)

# Pseudo Code! Nicht ausführbar

try:
    fp = open("datei")
except FileNotFoundError:
    # code
except OSError:
    # code

import json

data = json.loads("[1, 2, 3]")
print(data)
d1 = {"foo": 42, "bar": 23}
print(json.dumps(d1))
d2 = {"foo": 42, "bar": 23, "baz": [1, 2, 3]}
print(json.dumps(d2))
l = [d1, d2]
print(json.dumps(l))

[1, 2, 3]
{"foo": 42, "bar": 23}
{"foo": 42, "bar": 23, "baz": [1, 2, 3]}
[{"foo": 42, "bar": 23}, {"foo": 42, "bar": 23, "baz": [1, 2, 3]}]

data = {"foo": 42, "bar": 23, "baz": [1, 2, 3]}
with open("data.json", "w") as fp:
    json.dump(data, fp)

with open("data.json") as fp:
    data2 = json.load(fp)

assert data == data2, "Not equal"

Dateien¶