From cdd967fb112b2fe41e9b9909b43b35c2fce76dc7 Mon Sep 17 00:00:00 2001
From: Simon Green <mail@simon.green>
Date: Fri, 24 Jun 2022 23:17:16 +1000
Subject: sgreen solutions to challenge 170

---
 challenge-170/sgreen/python/ch-1.py | 36 ++++++++++++++++++++++++++++++++
 challenge-170/sgreen/python/ch-2.py | 41 +++++++++++++++++++++++++++++++++++++
 2 files changed, 77 insertions(+)
 create mode 100755 challenge-170/sgreen/python/ch-1.py
 create mode 100755 challenge-170/sgreen/python/ch-2.py

(limited to 'challenge-170/sgreen/python')

diff --git a/challenge-170/sgreen/python/ch-1.py b/challenge-170/sgreen/python/ch-1.py
new file mode 100755
index 0000000000..356393c2b4
--- /dev/null
+++ b/challenge-170/sgreen/python/ch-1.py
@@ -0,0 +1,36 @@
+#!/usr/bin/env python
+
+import math
+
+
+def is_prime(number):
+    '''Return true or false if the number is a prime'''
+    if number < 2:
+        return False
+
+    for i in range(2, int(math.sqrt(number)) + 1):
+        if number % i == 0:
+            return False
+
+    # It's a prime
+    return True
+
+
+def main():
+    solutions = [1]
+    value = 1
+    counter = 0
+
+    # We need 10 solutions
+    while len(solutions) < 10:
+        counter += 1
+        if is_prime(counter):
+            # Multiple the solution by this number
+            value *= counter
+            solutions.append(value)
+
+    print(*solutions, sep=', ')
+
+
+if __name__ == '__main__':
+    main()
diff --git a/challenge-170/sgreen/python/ch-2.py b/challenge-170/sgreen/python/ch-2.py
new file mode 100755
index 0000000000..fc0700a967
--- /dev/null
+++ b/challenge-170/sgreen/python/ch-2.py
@@ -0,0 +1,41 @@
+#!/usr/bin/env python
+
+import sys
+import yaml
+
+
+def check_array(a):
+    ''' Check that all rows in the array are the same length'''
+    for i in range(1, len(a)):
+        if (len(a[0]) != len(a[i])):
+            raise ValueError('mismatched array width')
+
+    return a
+
+
+def main(file_name):
+    # Read the supplied file in YAML format
+    with open(file_name, 'r') as file:
+        arrays = yaml.safe_load(file)
+
+    if len(arrays) != 2:
+        raise ValueError('Expecting two arrays')
+
+    array1 = check_array(arrays[0])
+    array2 = check_array(arrays[1])
+
+    solution = []
+    for row in array1:
+        for second_row in array2:
+            solution.append(list( str(c1 * c2) for c1 in row for c2 in second_row))
+
+    # Format each row uniformly.
+    max_length = max(max(len(col) for col in row) for row in solution)
+    fmt = '[' + (' {:>' + str(max_length) + 's}') * len(solution[0]) + ' ]'
+
+    for row in solution:
+        print(fmt.format(*row))
+
+
+if __name__ == '__main__':
+    main(sys.argv[1])
-- 
cgit