Reading 06: Code

reading06/Makefile

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+test:
+	@$(MAKE) -sk test-all
+
+test-all:	test-odds
+
+test-scripts:	
+	@curl -sLO https://www3.nd.edu/~pbui/teaching/cse.20289.sp25/static/txt/reading06/odds.test
+	@chmod +x ./*.test
+
+test-odds:	test-scripts odds.py
+	@echo Testing Odds ...
+	@./odds.test -v
+	@echo
+clean:
+	@rm -f *.test

reading06/odds.py

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+#!/usr/bin/env python3
+
+from typing import Iterator
+import io
+import sys
+
+# Functions
+
+def odds(stream=sys.stdin) -> list[int]:
+    ''' Return a list of all the odd numbers in stream. 
+
+    >>> odds(io.StringIO('\\n'.join('1 2 3 4 5'.split())))
+    [1, 3, 5]
+    '''
+    results = []
+    for line in stream:
+        number = int(line)
+        if number % 2:
+            results.append(number)
+    return results
+
+def odds_fp(stream=sys.stdin) -> Iterator[int]:
+    ''' Return a sequence of odd numbers from stream using map and filter. 
+
+    >>> odds_fp(io.StringIO('\\n'.join('1 2 3 4 5'.split()))) # doctest: +ELLIPSIS
+    <filter object at ...>
+    '''
+    numbers = map(int, stream)
+    return filter(lambda x: x % 2, numbers)
+
+def odds_lc(stream=sys.stdin) -> list[int]:
+    ''' Return a list of all the odd numbers in stream using a list
+    comprehension.
+
+    >>> odds_lc(io.StringIO('\\n'.join('1 2 3 4 5'.split())))
+    [1, 3, 5]
+    '''
+    numbers = []
+    for line in stream:
+        number = int(line)
+        if number % 2:
+            numbers.append(number)
+    return numbers
+
+def odds_gr(stream=sys.stdin) -> Iterator[int]:
+    ''' Return a sequence of odd numbers from stream using yield. 
+
+    >>> odds_gr(io.StringIO('\\n'.join('1 2 3 4 5'.split()))) # doctest: +ELLIPSIS
+    <generator object odds_gr at ...>
+    '''
+    for line in stream:
+        number = int(line)
+        if number % 2:
+            yield number
+
+# Main Execution
+
+def main(arguments=sys.argv[1:], stream=sys.stdin) -> None:
+    odds_functions = {
+        '-f': odds_fp,
+        '-l': odds_lc,
+        '-g': odds_gr,
+    }
+
+    if not arguments:
+        print('Usage: odds.py [-f -l -g]', file=sys.stderr)
+        sys.exit(1)
+
+    odds_function = odds_functions.get(arguments[0], odds)
+    for odd in odds_function(stream):
+        print(odd)
+
+if __name__ == '__main__':
+    main()