pwc264 solution in python

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diff --git a/challenge-264/pokgopun/python/ch-1.py b/challenge-264/pokgopun/python/ch-1.py
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+### https://theweeklychallenge.org/blog/perl-weekly-challenge-264/
+"""
+
+Task 1: Greatest English Letter
+
+Submitted by: [47]Mohammad Sajid Anwar
+     __________________________________________________________________
+
+   You are given a string, $str, made up of only alphabetic characters
+   [a..zA..Z].
+
+   Write a script to return the greatest english letter in the given
+   string.
+
+     A letter is greatest if it occurs as lower and upper case. Also
+     letter ‘b’ is greater than ‘a’ if ‘b’ appears after ‘a’ in the
+     English alphabet.
+
+Example 1
+
+Input: $str = 'PeRlwEeKLy'
+Output: L
+
+There are two letters E and L that appears as lower and upper.
+The letter L appears after E, so the L is the greatest english letter.
+
+Example 2
+
+Input: $str = 'ChaLlenge'
+Output: L
+
+Example 3
+
+Input: $str = 'The'
+Output: ''
+
+Task 2: Target Array
+"""
+### solution by pokgopun@gmail.com
+
+def gel(word: str):
+    word = word.upper() + chr(0)*2
+    c = max(e for e in set(word) if word.count(e) > 1)
+    return "" if c==chr(0) else c
+
+import unittest
+
+class TestGel(unittest.TestCase):
+    def test(self):
+        for inpt,otpt in {
+                'PeRlwEeKLy': "L",
+                'ChaLlenge': "L",
+                'The': ''
+                }.items():
+            self.assertEqual(gel(inpt),otpt)
+
+unittest.main()
diff --git a/challenge-264/pokgopun/python/ch-2.py b/challenge-264/pokgopun/python/ch-2.py
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+### https://theweeklychallenge.org/blog/perl-weekly-challenge-264/
+"""
+
+Task 2: Target Array
+
+Submitted by: [48]Mohammad Sajid Anwar
+     __________________________________________________________________
+
+   You are given two arrays of integers, @source and @indices. The
+   @indices can only contains integers 0 <= i < size of @source.
+
+   Write a script to create target array by insert at index $indices[i]
+   the value $source[i].
+
+Example 1
+
+Input: @source  = (0, 1, 2, 3, 4)
+       @indices = (0, 1, 2, 2, 1)
+Output: (0, 4, 1, 3, 2)
+
+@source  @indices  @target
+0        0         (0)
+1        1         (0, 1)
+2        2         (0, 1, 2)
+3        2         (0, 1, 3, 2)
+4        1         (0, 4, 1, 3, 2)
+
+Example 2
+
+Input: @source  = (1, 2, 3, 4, 0)
+       @indices = (0, 1, 2, 3, 0)
+Output: (0, 1, 2, 3, 4)
+
+@source  @indices  @target
+1        0         (1)
+2        1         (1, 2)
+3        2         (1, 2, 3)
+4        3         (1, 2, 3, 4)
+0        0         (0, 1, 2, 3, 4)
+
+Example 3
+
+Input: @source  = (1)
+       @indices = (0)
+Output: (1)
+     __________________________________________________________________
+
+   Last date to submit the solution 23:59 (UK Time) Sunday 14th April
+   2024.
+     __________________________________________________________________
+
+SO WHAT DO YOU THINK ?
+"""
+### solution by pokgopun@gmail.com
+
+def target(source,indices):
+    result = list()
+    for i in range(len(source)):
+        result.insert(indices[i],source[i])
+    return tuple(result)
+
+import unittest
+
+class TestTarget(unittest.TestCase):
+    def test(self):
+        for (source,indices), result in {
+                ((0, 1, 2, 3, 4), (0, 1, 2, 2, 1)): (0, 4, 1, 3, 2),
+                ((1, 2, 3, 4, 0), (0, 1, 2, 3, 0)): (0, 1, 2, 3, 4),
+                ((1,), (0,)): (1,),
+                }.items():
+            self.assertEqual(target(source,indices),result)
+
+unittest.main()