Ch96 (Python): Tasks 1 & 2

8 files changed, 164 insertions, 0 deletions

diff --git a/challenge-096/tyler-wardhaugh/python/.gitignore b/challenge-096/tyler-wardhaugh/python/.gitignore
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+++ b/challenge-096/tyler-wardhaugh/python/.gitignore
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+### Python
+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+*$py.class
+
+# IPython
+profile_default/
+ipython_config.py
+
+# mypy
+.mypy_cache/
+.dmypy.json
+dmypy.json
+
+# Environments
+.env
+.venv
+env/
+venv/
+ENV/
+env.bak/
+venv.bak/
+pythonenv*
diff --git a/challenge-096/tyler-wardhaugh/python/Makefile b/challenge-096/tyler-wardhaugh/python/Makefile
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index 0000000000..bf7573b58a
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+++ b/challenge-096/tyler-wardhaugh/python/Makefile
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+.PHONEY: help
+help:
+	@grep -E '^[0-9a-zA-Z_-]+:.*?## .*$$' $(MAKEFILE_LIST) | \
+   sort | \
+   awk 'BEGIN {FS = ":.*?## "}; {printf "\033[36m%-30s\033[0m %s\n", $$1, $$2}'
+
+.PHONEY: test
+test: ## run the test suite
+	@python -m unittest
+
+.PHONEY: satisfy-reqs
+satisfy-reqs: ## ensure the requirements are installed
+	@python -m pip install -r requirements.txt
diff --git a/challenge-096/tyler-wardhaugh/python/README.md b/challenge-096/tyler-wardhaugh/python/README.md
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index 0000000000..976f770899
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+++ b/challenge-096/tyler-wardhaugh/python/README.md
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+
+# The Weekly Challenge
+
+The Weekly Challenge - #096 - Tyler Wardhaugh
+
+## Usage
+
+Ensure requirements are satified (ideally in venv):
+    $ make satisfy-reqs
+
+Run Task 1:
+
+    $ ./ch1.py S
+
+Run Task 2:
+
+    $ ./ch2.py S1 S2
+
+Run the project's tests (all the samples from the task descriptions plus some others):
+
+    $ make test
+
+## Requirements:
+*   [Python 3](https://www.python.org/)
+*   [NumPy](https://numpy.org/)
diff --git a/challenge-096/tyler-wardhaugh/python/ch1.py b/challenge-096/tyler-wardhaugh/python/ch1.py
new file mode 100755
index 0000000000..37272382cb
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+++ b/challenge-096/tyler-wardhaugh/python/ch1.py
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+#!/usr/bin/env python3
+"""Challenge 96, Task 1"""
+
+import sys
+import re
+
+DEFAULT_INPUT = "The Weekly Challenge"
+
+def reverse_words(s):
+    """Split a string s into words and reverse their order."""
+    words = re.split(r'\s+', s.strip())
+    return ' '.join(words[::-1])
+
+
+def main(args=None):
+    """Run the task"""
+    if args is None:
+        args = sys.argv[1:]
+
+    s = args[0] if args else DEFAULT_INPUT
+    print(reverse_words(s))
+
+
+if __name__ == '__main__':
+    sys.exit(main())
diff --git a/challenge-096/tyler-wardhaugh/python/ch2.py b/challenge-096/tyler-wardhaugh/python/ch2.py
new file mode 100755
index 0000000000..e55363e938
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+++ b/challenge-096/tyler-wardhaugh/python/ch2.py
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+#!/usr/bin/env python3
+"""Challenge 96, Task 2"""
+
+import sys
+import numpy as np
+
+
+DEFAULT_INPUT = ["kitten", "sitting"]
+
+
+def edit_distance(s1, s2):
+    """Determine the edit distance between two strings."""
+    dp = np.zeros((len(s1), len(s2)), dtype=np.int)
+    for i, j in np.ndindex(dp.shape):
+        if i == 0:
+            dp[i][j] = j
+        elif j == 0:
+            dp[i][j] = i
+        elif s1[i - 1] == s2[j - 1]:
+            dp[i][j] = dp[i - 1][j - 1]
+        else:
+            dp[i][j] = 1 + min(dp[i][j - 1],
+                               dp[i - 1][j],
+                               dp[i - 1][j - 1])
+
+    return dp[-1][-1]
+
+
+def main(args=None):
+    """Run the task"""
+    if args is None:
+        args = sys.argv[1:]
+
+    if args:
+        s1, s2 = args[0:2]
+    else:
+        s1, s2 = DEFAULT_INPUT
+
+    print(edit_distance(s1, s2))
+
+
+if __name__ == '__main__':
+    sys.exit(main())
diff --git a/challenge-096/tyler-wardhaugh/python/requirements.txt b/challenge-096/tyler-wardhaugh/python/requirements.txt
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index 0000000000..1e99151eb7
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+++ b/challenge-096/tyler-wardhaugh/python/requirements.txt
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+numpy==1.19.5
diff --git a/challenge-096/tyler-wardhaugh/python/test_ch1.py b/challenge-096/tyler-wardhaugh/python/test_ch1.py
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+++ b/challenge-096/tyler-wardhaugh/python/test_ch1.py
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+#!/usr/bin/env python3
+
+import unittest
+from ch1 import reverse_words
+
+class TestTask1(unittest.TestCase):
+
+
+    def test_example_cases(self):
+        self.assertEqual(
+                "Challenge Weekly The", reverse_words("The Weekly Challenge"))
+        self.assertEqual(
+                "family same the of part are Raku and Perl",
+                reverse_words("    Perl and   Raku are  part of the same family  "))
+
+
+if __name__ == '__main__':
+    unittest.main()
diff --git a/challenge-096/tyler-wardhaugh/python/test_ch2.py b/challenge-096/tyler-wardhaugh/python/test_ch2.py
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index 0000000000..4341cbded4
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+++ b/challenge-096/tyler-wardhaugh/python/test_ch2.py
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+#!/usr/bin/env python3
+
+import unittest
+from ch2 import edit_distance
+
+class TestTask2(unittest.TestCase):
+
+
+    def test_example_cases(self):
+        self.assertEqual(3, edit_distance("kitten", "sitting"))
+        self.assertEqual(2, edit_distance("sunday", "monday"))
+
+
+if __name__ == '__main__':
+    unittest.main()