Merge pull request 'simple classes, add codewars - last digit of huge number' (#2) from feature/codewars_last_digit_of_huge_number into master

Reviewed-on: #2

src/classes.py

@@ -0,0 +1,32 @@
+from dataclasses import dataclass
+
+
+@dataclass(frozen=True)
+class Konto:
+    inhaber: str
+    saldo: float
+
+    def __init__(self, inhaber: str, saldo: float):
+        if not inhaber:
+            raise ValueError("inhaber is required")
+        if saldo < 0:
+            raise ValueError("saldo must be positive")
+        object.__setattr__(self, "inhaber", inhaber)
+        object.__setattr__(self, "saldo", saldo)
+
+    def einzahlen(self, betrag: float):
+        object.__setattr__(self, "saldo", self.saldo + betrag)
+
+    def abheben(self, betrag: float):
+        object.__setattr__(self, "saldo", self.saldo - betrag)
+        return betrag
+
+
+k1 = Konto("Alice", 100.0)
+k2 = Konto("Housi", 10)
+k2.einzahlen(100)
+
+print(k1.inhaber)
+print(k2.saldo)
+print(k1 is k2)
+print(k1)

src/codewars/lastDigitOfHugeNumber.py

@@ -0,0 +1,9 @@
+def last_digit(lst):
+    rev_lst = list(reversed(lst))
+
+    n = 1
+
+    for number in rev_lst:
+        n = number ** (n if n < 4 else n % 4 + 4)
+
+    return n % 10

tests/codewars/test_lastDigitOfHugeNumber.py

@@ -0,0 +1,20 @@
+from codewars.lastDigitOfHugeNumber import last_digit
+
+
+def test_last_digit():
+    test_data = [
+        ([], 1),
+        ([0, 0], 1),
+        ([0, 0, 0], 0),
+        ([1, 2], 1),
+        ([3, 4, 5], 1),
+        ([4, 3, 6], 4),
+        ([7, 6, 21], 1),
+        ([12, 30, 21], 6),
+        ([2, 2, 2, 0], 4),
+        ([937640, 767456, 981242], 0),
+        ([123232, 694022, 140249], 6),
+        ([499942, 898102, 846073], 6),
+    ]
+    for test_input, test_output in test_data:
+        assert last_digit(test_input) == test_output