Homework 04: Initial Import

homework04/Makefile

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+test:
+	@$(MAKE) -sk test-all
+
+test-all:	test-cut test-wc
+
+test-data:
+	@curl -sLO https://www3.nd.edu/~pbui/teaching/cse.20289.sp25/static/txt/homework04/cut.input
+	@curl -sLO https://www3.nd.edu/~pbui/teaching/cse.20289.sp25/static/txt/homework04/wc.input
+
+test-scripts:	test-data
+	@curl -sLO https://www3.nd.edu/~pbui/teaching/cse.20289.sp25/static/txt/homework04/cut.test
+	@curl -sLO https://www3.nd.edu/~pbui/teaching/cse.20289.sp25/static/txt/homework04/wc.test
+
+	@chmod +x ./*.test
+
+test-cut:	test-scripts cut.py
+	@echo Testing Cut ...
+	@./cut.test -v
+	@echo
+
+test-wc: 	test-scripts wc.py
+	@echo Testing WC ...
+	@./wc.test -v
+	@echo
+
+clean:
+	@rm -f *.input *.test

homework04/cut.py

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+#!/usr/bin/env python3
+
+''' cut.py - remove sections from each line of stream '''
+
+import io
+import sys
+
+# Functions
+
+def usage(exit_status: int=0) -> None:
+    ''' Print usage message and exit. '''
+    print('''Usage: cut -d DELIMITER -f FIELDS
+
+Print selected parts of lines from stream to standard output.
+
+    -d DELIMITER    Use DELIM instead of TAB for field delimiter
+    -f FIELDS       Select only these fields''', file=sys.stderr)
+    sys.exit(exit_status)
+
+def strs_to_ints(strings: list[str]) -> list[int]:
+    ''' Convert all strings in list to integers.
+
+    >>> strs_to_ints(['2', '4'])
+    [2, 4]
+    '''
+    pass
+
+def cut_line(line: str, delimiter: str='\t', fields: list[int]=[]) -> list[str]:
+    ''' Return selected fields from line separated by delimiter.
+
+    >>> cut_line('Harder, Better, Faster, Stronger', ',', [2, 4])
+    [' Better', ' Stronger']
+    '''
+    pass
+
+def cut_stream(stream=sys.stdin, delimiter: str='\t', fields: list[int]=[]) -> None:
+    ''' Print selected parts of lines from stream to standard output.
+
+    >>> cut_stream(io.StringIO('Harder, Better, Faster, Stronger'), ',', [2, 4])
+     Better, Stronger
+    '''
+    pass
+
+# Main Execution
+
+def main(arguments=sys.argv[1:], stream=sys.stdin) -> None:
+    ''' Print selected parts of lines from stream to standard output.
+
+    This function will parse the command line arguments to determine the
+    delimiter and which fields to select from each line.
+
+    >>> main('-d , -f 2,4'.split(), io.StringIO('Harder, Better, Faster, Stronger'))
+     Better, Stronger
+    '''
+    # Parse command line arguments
+    pass
+
+    # Cut stream with delimiter and fields
+    pass
+
+if __name__ == '__main__':
+    main()
+
+# vim: set sts=4 sw=4 ts=8 expandtab ft=python:

homework04/wc.py

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+#!/usr/bin/env python3
+
+''' wc.py - print newline, word, and byte counts for stream '''
+
+import io
+import sys
+
+# Functions
+
+def usage(exit_status: int=0) -> None:
+    ''' Print usage message and exit. '''
+    print('''Usage: wc.py [-l | -w | -c]
+
+Print newline, word, and byte counts from standard input.
+
+The options below may be used to select which counts are printed, always in
+the following order: newline, word, byte.
+
+    -c      Print byte counts
+    -l      Print newline counts
+    -w      Print word counts''', file=sys.stderr)
+    sys.exit(exit_status)
+
+def count_stream(stream=sys.stdin) -> dict[str, int]:
+    ''' Count the newlines, words, and bytes in specified stream.
+
+    >>> count_stream(io.StringIO('Despite all my rage, I am still just a rat in a cage'))
+    {'newlines': 1, 'words': 13, 'bytes': 52}
+    '''
+    pass
+
+def print_counts(counts: dict[str, int], options: list[str]) -> None:
+    ''' Print the newline, word, and byte counts.  If none of the options are
+    specified, then include all options in output.  Othewrise, only include the
+    specified options.
+
+    Note: always output the counts the following order: newlines, words, bytes.
+
+    >>> print_counts({'newlines': 1, 'words': 13, 'bytes': 52}, ['newlines', 'words', 'bytes'])
+     1 13 52
+    '''
+    pass
+
+# Main Execution
+
+def main(arguments=sys.argv[1:], stream=sys.stdin) -> None:
+    ''' Print the newline, word, and byte counts from stream.
+
+    This function will parse the command line arguments to select which counts
+    to include in the final report.
+
+    >>> main([], io.StringIO('Despite all my rage, I am still just a rat in a cage'))
+     1 13 52
+    '''
+    # Parse command line arguments
+    pass
+
+    # Count stream and print counts
+    pass
+
+if __name__ == '__main__':
+    main()
+
+# vim: set sts=4 sw=4 ts=8 expandtab ft=python: