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laskin.py

+
+import re
+from operator import add, sub, mul, truediv
+
+print("Luku on 0.")
+lista =[]
+def laske(lista):
+    ops = {'+': add, '-': sub, '*': mul, '/': truediv}
+    result = 0
+    for x in lista:
+        op, num = re.match(r'([+\-\*/])(\d+)', x).groups()
+        result = ops[op](result, int(num))
+    return result
+
+while True:
+    luku = input("Anna operaatio (tyhjä lopettaa): ")
+    if luku == "":
+        break
+    lista.append(luku)
+    print(f"Luku on {int(laske(lista))}.")
+
+print("Kiitos ja moi!")
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