+
+
+
+
+
+
+
+
+Dateien¶
+
+
+
+
+
+
+
+In [ ]:
+
+
+
+
+
+fp = open("../uebungen/salaries.txt", encoding="utf-8")
+content = fp.read()
+print(type(content))
+
+
+
+
+
+
+
+
+
+
+
+<class 'str'> ++
+
+
+
+
+
+
+In [ ]:
+
+
+
+
+
+fp = open("../uebungen/salaries.txt", "rb")
+content = fp.read()
+print(type(content))
+text = content.decode("utf-8")
+print(type(text))
+
+
+
+
+
+
+
+
+
+
+
+<class 'bytes'> +<class 'str'> ++
+
+
+
+
+
+
+In [ ]:
+
+
+
+
+
+fp = open("../uebungen/salaries.txt", mode="r")
+line = fp.readline()
+print(repr(line))
+
+
+
+
+
+
+
+
+
+
+
+'Anna: 2000\n' ++
+
+
+
+
+
+
+In [ ]:
+
+
+
+
+
+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 ++
+
+
+
+
+
+
+In [ ]:
+
+
+
+
+
+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'] ++
+
+
+
+
+
+
+In [ ]:
+
+
+
+
+
+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 ++
+
+
+
+
+
+
+In [ ]:
+
+
+
+
+
+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 ++
+
+
+
+
+
+
+In [ ]:
+
+
+
+
+
+lines = open("../uebungen/salaries.txt", encoding="utf-8").readlines()
+
+
+
+
+
+
+
+In [ ]:
+
+
+
+
+
+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 ++
+
+
+
+
+
+
+In [ ]:
+
+
+
+
+
+# Pseudo Code! Nicht ausführbar
+fp = open("../uebungen/salaries.txt")
+ctx = new_context(fp)
+fp.open_context(ctx)
+# code block
+fp.end_context(ctx)
+
+
+
+
+
+
+
+In [ ]:
+
+
+
+
+
+# Pseudo Code! Nicht ausführbar
+
+try:
+ fp = open("datei")
+except FileNotFoundError:
+ # code
+except OSError:
+ # code
+
+
+
+
+
+
+
+In [ ]:
+
+
+
+
+
+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]}]
+
+
+
+
+
+
+
+
+In [ ]:
+
+
+
+
+
+data = {"foo": 42, "bar": 23, "baz": [1, 2, 3]}
+with open("data.json", "w") as fp:
+ json.dump(data, fp)
+
+
+
+
+
+
+
+
+In [ ]:
+
+
+
+
+
+with open("data.json") as fp:
+ data2 = json.load(fp)
+
+assert data == data2, "Not equal"
+