102 lines
3.8 KiB
Python
102 lines
3.8 KiB
Python
import shlex
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HEADER_TEXT = 'number name age address misc. "blank column?"'
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BODY_TEXT = '''
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4 "John Smith" 26 "123 north street"
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17 "Jenny Smith" 8 "123 north street"
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55 "Veronica Dove" 20 "456 west street"
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77 "Austin Texas" 33 "789 south avenue"
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89 "Mister Super Long Name" 123 "planet earth" "he's really old"
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120 "Bill" "" "" "Deceased"
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999 "Nine Nine" 999 "999 ninth boulevard" "favorite number is 9"
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'''
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BODY_TEXT = BODY_TEXT.strip()
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DELIMITER = ' | '
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output_text = ''
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# Keep track of the longest entry in each column, to determine
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# how wide we should make them.
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# Also, look for numerical columns so we can right-justify them.
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header = shlex.split(HEADER_TEXT)
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column_widths = {index:len(item) for (index, item) in enumerate(header)}
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column_types = {}
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document_lines = [shlex.split(line) for line in BODY_TEXT.splitlines()]
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for line in document_lines:
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for (index, word) in enumerate(line):
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current_width = column_widths.get(index, 0)
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column_widths[index] = max(len(word), current_width)
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try:
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float(word)
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except ValueError:
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# It only takes one failure to make the whole column
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# string type.
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if word != "":
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column_types[index] = 's'
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# Move the dictionary into a list where the index is the column
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# number, and the value is how wide it should be.
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column_widths = list(column_widths.items())
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column_widths.sort(key=lambda x: x[0])
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column_widths = [x[1] for x in column_widths]
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# Format column widths into a string which will become the basis
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# for each row.
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column_format = '{:%s%d%s}'
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column_formats = []
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for (index, width) in enumerate(column_widths):
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formtype = column_types.get(index, 'g')
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justify = '<' if formtype == 's' else '>'
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form = column_format % (justify, width, formtype)
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column_formats.append(form)
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# Format the header.
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column_count = len(column_widths)
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diff = len(header) - column_count
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if diff > 0:
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# We have labels for columns that were empty.
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column_count = len(header)
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else:
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diff *= -1
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header += [''] * diff
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for (index, label) in enumerate(header):
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form = '{:<%ds}' % column_widths[index]
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header[index] = form.format(label)
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header = DELIMITER.join(header)
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output_text += header + '\n'
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# Format the rows.
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for (rowindex, line) in enumerate(document_lines):
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# Does this row need any blank columns?
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diff = column_count - len(line)
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if diff > 0:
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line += [''] * diff
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document_lines[rowindex] = line
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# Format and replace it into the list.
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for (columnindex, word) in enumerate(line):
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if word == '':
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line[columnindex] = ' ' * column_widths[columnindex]
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else:
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if column_types.get(columnindex, 'g') == 'g':
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word = float(word)
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else:
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word = str(word)
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line[columnindex] = column_formats[columnindex].format(word)
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document_lines = [DELIMITER.join(line) for line in document_lines]
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document_lines = '\n'.join(document_lines)
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output_text += document_lines
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print(output_text)
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'''
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number | name | age | address | misc. | blank column?
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4 | John Smith | 26 | 123 north street | |
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17 | Jenny Smith | 8 | 123 north street | |
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55 | Veronica Dove | 20 | 456 west street | |
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77 | Austin Texas | 33 | 789 south avenue | |
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89 | Mister Super Long Name | 123 | planet earth | he's really old |
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120 | Bill | | | Deceased |
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999 | Nine Nine | 999 | 999 ninth boulevard | favorite number is 9 |
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''' |