Add solutions for uebungen for files

Signed-off-by: Christopher Arndt <chris@chrisarndt.de>

loesungen/dateien.py

@@ -0,0 +1,137 @@
+# Aufgabe 1
+
+fp = open("../uebungen/employee_skills.txt", encoding="utf-8")
+contents = fp.read()
+fp.close()
+
+print("Länge:", len(contents))
+
+print("-" * 50)
+
+# Alternativ:
+
+with open("../uebungen/employee_skills.txt") as fp:
+    contents = fp.read()
+
+print(contents)
+
+print("-" * 50)
+
+
+# Aufgabe 2
+
+with open("../uebungen/employee_skills.txt") as fp:
+    i = 0
+    for line in fp:
+        line = line.strip()
+
+        if not line:
+            continue
+
+        i += 1
+
+print("Nicht leere Zeilen:", i)
+
+print("-" * 50)
+
+
+# Aufgabe 3
+
+employees = []
+with open("../uebungen/employee_skills.txt") as fp:
+    for line in fp:
+        if not line.strip():
+            continue
+
+        name = line.split(":")[0].strip()
+        employees.append(name)
+
+employees.sort()
+
+for name in employees:
+    print(name)
+
+print("-" * 50)
+
+
+# Aufgabe 4
+
+employee_salaries = {}
+with open("../uebungen/salaries.txt") as fp:
+    for line in fp:
+        if not line.strip():
+            continue
+
+        name, salary = line.strip().split(":", 1)
+        name = name.strip()
+        salary = int(salary.strip())
+        employee_salaries[name] = salary
+
+print("Min. Gehalt:", min(employee_salaries.values()))
+print("Max. Gehalt:", max(employee_salaries.values()))
+
+print("-" * 50)
+
+
+# Aufgabe 5
+
+employee_skills = {}
+with open("../uebungen/employee_skills.txt") as fp:
+    for line in fp:
+        if not line.strip():
+            continue
+
+        name, skills = line.strip().split(":", 1)
+        name = name.strip()
+        skills = [item.strip() for item in skills.split(",")]
+        employee_skills[name] = skills
+
+
+# Aufgabe 6
+
+employees = {}
+
+for key in employee_salaries:
+    salary = employee_salaries.get(key, 0)
+    skills = employee_skills.get(key)
+    employees[key] = {"skills": skills, "salary": salary}
+
+print("-" * 50)
+
+
+# Aufgabe 6
+
+employee_salaries = {}
+try:
+    with open("../uebungen/salaries-errors.txt") as fp:
+        for i, line in enumerate(fp):
+            # remove whitspace at satrt / end of line
+            line = line.strip()
+
+            # ignore empty / whitespace-only lines
+            # and comment lines
+            if not line or line.startswith("#"):
+                continue
+
+            try:
+                name, salary = line.strip().split(":", 1)
+            except ValueError as exc:
+                print(f"Warning: could not parse line {i+1}: {exc}")
+            else:
+                name = name.strip()
+                try:
+                    salary = salary.strip()
+                    salary = salary.strip("$€")
+                    salary = int(salary)
+                except (ValueError, TypeError) as exc:
+                    print(f"Warning: could not parse data on line {i+1}: {exc}")
+                else:
+                    employee_salaries[name] = salary
+except FileNotFoundError as exc:
+    print(f"Could not open file: {exc}")
+
+
+print("Min. Gehalt:", min(employee_salaries.values()))
+print("Max. Gehalt:", max(employee_salaries.values()))
+
+print("-" * 50)