From 824ab69c7305d6b3a79096b8de106277deeb3963 Mon Sep 17 00:00:00 2001
From: Nils Liebreich <nilsl99@mi.fu-berlin.de>
Date: Tue, 8 Nov 2022 21:57:52 +0100
Subject: [PATCH] Changed Stack.__str__ and fixed pop
---
Aufgabe03a.py | 13 +++++--------
1 file changed, 5 insertions(+), 8 deletions(-)
diff --git a/Aufgabe03a.py b/Aufgabe03a.py
index 68d4c92..83f4a67 100644
--- a/Aufgabe03a.py
+++ b/Aufgabe03a.py
@@ -4,19 +4,14 @@ class Stack():
self.stack = l
def __str__(self):
- result = ""
- max_length = 1
- if not self.isEmpty():
- max_length = len(str(max(self.stack, key=lambda x: len(str(x)))))
- vert = "\u2502"
- for ele in reversed(self.stack):
- result += vert + str(ele).rjust(max_length) + vert + "\n"
- return result + "\u2514" + "\u2500"*max_length + "\u2518"
+ return str(self.stack)
def push(self, element):
self.stack.append(element)
def pop(self):
+ if self.isEmpty():
+ raise ValueError("The Stack is empty!")
element = self.stack[-1]
del self.stack[-1]
return element
@@ -65,6 +60,8 @@ class StackList:
self.first_element = ListElement(value, self.first_element)
def pop(self):
+ if self.isEmpty():
+ raise ValueError("The Stack is empty!")
value = self.first_element.value
self.first_element = self.first_element.next
return value
--
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