Add Python solution to challenge 106 task 2

2 files changed, 40 insertions, 1 deletions

diff --git a/challenge-106/paulo-custodio/perl/ch-2.pl b/challenge-106/paulo-custodio/perl/ch-2.pl
index 390fa68cb1..aa2f756590 100644
--- a/challenge-106/paulo-custodio/perl/ch-2.pl
+++ b/challenge-106/paulo-custodio/perl/ch-2.pl
@@ -1,4 +1,4 @@
-#!/usr/bin/perl
+#!/usr/bin/env perl
 
 # TASK #2 › Decimal String
 # Submitted by: Mohammad S Anwar
diff --git a/challenge-106/paulo-custodio/python/ch-2.py b/challenge-106/paulo-custodio/python/ch-2.py
new file mode 100644
index 0000000000..6a019e26d6
--- /dev/null
+++ b/challenge-106/paulo-custodio/python/ch-2.py
@@ -0,0 +1,39 @@
+#!/usr/bin/env python3
+
+# TASK #2 > Decimal String
+# Submitted by: Mohammad S Anwar
+# You are given numerator and denominator i.e. $N and $D.
+#
+# Write a script to convert the fraction into decimal string. If the fractional
+# part is recurring then put it in parenthesis.
+#
+# Example
+# Input: $N = 1, $D = 3
+# Output: "0.(3)"
+#
+# Input: $N = 1, $D = 2
+# Output: "0.5"
+#
+# Input: $N = 5, $D = 66
+# Output: "0.0(75)"
+
+import sys
+import re
+from decimal import *
+
+def frac2str(n, d):
+    getcontext().prec = 1000
+    getcontext().rounding = ROUND_DOWN
+
+    n = Decimal(n)
+    d = Decimal(d)
+    q = str(n/d)
+
+    for rept in range(1,101):
+        match = re.search(r"((\d{"+str(rept)+r"})\2+\d*)", q)
+        if match:
+            q = re.sub(match.group(1), "("+match.group(2)+")", q)
+            return q
+    return q
+
+print(frac2str(int(sys.argv[1]), int(sys.argv[2])))