1 files changed, 71 insertions, 0 deletions
diff --git a/challenge-328/pokgopun/python/ch-1.py b/challenge-328/pokgopun/python/ch-1.py
new file mode 100644
index 0000000000..442de91ec6
--- /dev/null
+++ b/challenge-328/pokgopun/python/ch-1.py
@@ -0,0 +1,71 @@
+### https://theweeklychallenge.org/blog/perl-weekly-challenge-328/
+"""
+
+Task 1: Replace all ?
+
+Submitted by: [42]Mohammad Sajid Anwar
+     __________________________________________________________________
+
+   You are given a string containing only lower case English letters and
+   ?.
+
+   Write a script to replace all ? in the given string so that the string
+   doesn’t contain consecutive repeating characters.
+
+Example 1
+
+Input: $str = "a?z"
+Output: "abz"
+
+There can be many strings, one of them is "abz".
+The choices are 'a' to 'z' but we can't use either 'a' or 'z' to replace the '?'
+.
+
+Example 2
+
+Input: $str = "pe?k"
+Output: "peak"
+
+Example 3
+
+Input: $str = "gra?te"
+Output: "grabte"
+
+Task 2: Good String
+"""
+### solution by pokgopun@gmail.com
+
+def ra(string: str) -> str:
+    chrs = list(string)
+    l = len(chrs)
+    first = ord('a')
+    last = ord('z')
+    for i in range(l):
+        if chrs[i] == '?':
+            lst: list[str] = []
+            if i > 0:
+                prv = chrs[i-1]
+                if prv.isalpha():
+                    lst.append(ord(prv))
+            if i < l - 1:
+                nxt = chrs[i+1]
+                if nxt.isalpha():
+                    lst.append(ord(nxt))
+            for j in range(first,last+1):
+                if j not in lst:
+                    chrs[i] = chr(j)
+                    break
+    return "".join(chrs)
+
+import unittest
+
+class TestRa(unittest.TestCase):
+    def test(self):
+        for inpt, otpt in {
+                "a?z": "abz",
+                "pe?k": "peak",
+                "gra?te": "grabte",
+                }.items():
+            self.assertEqual(ra(inpt),otpt)
+
+unittest.main()