pwc323 solution in python

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diff --git a/challenge-323/pokgopun/python/ch-1.py b/challenge-323/pokgopun/python/ch-1.py
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+### https://theweeklychallenge.org/blog/perl-weekly-challenge-323/
+"""
+
+Task 1: Increment Decrement
+
+Submitted by: [47]Mohammad Sajid Anwar
+     __________________________________________________________________
+
+   You are given a list of operations.
+
+   Write a script to return the final value after performing the given
+   operations in order. The initial value is always 0.
+Possible Operations:
+++x or x++: increment by 1
+--x or x--: decrement by 1
+
+Example 1
+
+Input: @operations = ("--x", "x++", "x++")
+Output: 1
+
+Operation "--x" =>  0 - 1 => -1
+Operation "x++" => -1 + 1 =>  0
+Operation "x++" =>  0 + 1 =>  1
+
+Example 2
+
+Input: @operations = ("x++", "++x", "x++")
+Output: 3
+
+Example 3
+
+Input: @operations = ("x++", "++x", "--x", "x--")
+Output: 0
+
+Operation "x++" => 0 + 1 => 1
+Operation "++x" => 1 + 1 => 2
+Operation "--x" => 2 - 1 => 1
+Operation "x--" => 1 - 1 => 0
+
+Task 2: Tax Amount
+"""
+### solution by pokgopun@gmail.com
+
+def id(ops: tuple[str]) -> int:
+    v = 0
+    for op in ops:
+        for sig in (op[0],op[-1]):
+            if sig == "-":
+                v -= 1
+            elif sig == "+":
+                v += 1
+            else:
+                continue
+            break
+    return v
+
+import unittest
+
+class TestId(unittest.TestCase):
+    def test(self):
+        for inpt, otpt in {
+                ("--x", "x++", "x++"): 1,
+                ("x++", "++x", "x++"): 3,
+                ("x++", "++x", "--x", "x--"): 0,
+                }.items():
+            self.assertEqual(id(inpt),otpt)
+
+unittest.main()
+
+
diff --git a/challenge-323/pokgopun/python/ch-2.py b/challenge-323/pokgopun/python/ch-2.py
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+### https://theweeklychallenge.org/blog/perl-weekly-challenge-323/
+"""
+
+Task 2: Tax Amount
+
+Submitted by: [48]Mohammad Sajid Anwar
+     __________________________________________________________________
+
+   You are given an income amount and tax brackets.
+
+   Write a script to calculate the total tax amount.
+
+Example 1
+
+Input: $income = 10, @tax = ([3, 50], [7, 10], [12,25])
+Output: 2.65
+
+1st tax bracket upto  3, tax is 50%.
+2nd tax bracket upto  7, tax is 10%.
+3rd tax bracket upto 12, tax is 25%.
+
+Total Tax => (3 * 50/100) + (4 * 10/100) + (3 * 25/100)
+          => 1.50 + 0.40 + 0.75
+          => 2.65
+
+Example 2
+
+Input: $income = 2, @tax = ([1, 0], [4, 25], [5,50])
+Output: 0.25
+
+Total Tax => (1 * 0/100) + (1 * 25/100)
+          => 0 + 0.25
+          => 0.25
+
+Example 3
+
+Input: $income = 0, @tax = ([2, 50])
+Output: 0
+     __________________________________________________________________
+
+   Last date to submit the solution 23:59 (UK Time) Sunday 1st June 2025.
+     __________________________________________________________________
+
+SO WHAT DO YOU THINK ?
+"""
+### solution by pokgopun@gmail.com
+
+from dataclasses import dataclass
+
+@dataclass
+class TaxB:
+    ceil: float
+    perc: float
+
+def ta(income: float, tax: list[TaxB]) -> float:
+    floor = .0
+    ttax = 0
+    taxt = 0
+    for tb in tax:
+        if income >= tb.ceil:
+            taxt = tb.ceil - floor
+        else:
+            taxt = income - floor
+        ttax += taxt * tb.perc / 100
+        if income <= tb.ceil:
+            break
+        floor = tb.ceil
+    return ttax
+
+import unittest
+
+class TestTa(unittest.TestCase):
+    def test(self):
+        for income, tax, otpt in (
+                (10, (TaxB(3, 50), TaxB(7, 10), TaxB(12,25)), 2.65),
+                (2, (TaxB(1, 0), TaxB(4, 25), TaxB(5,50)), 0.25),
+                (0, (TaxB(2, 50),), 0),
+                ): 
+            self.assertEqual(ta(income,tax), otpt)
+
+unittest.main()