晋太元中，武陵人捕鱼为业。缘溪行，忘路之远近。忽逢桃花林，夹岸数百步，中无杂树，芳草鲜美，落英缤纷。渔人甚异之，复前行，欲穷其林。 　　林尽水源，便得一山，山有小口，仿佛若有光。便舍船，从口入。初极狭，才通人。复行数十步，豁然开朗。土地平旷，屋舍俨然，有良田、美池、桑竹之属。阡陌交通，鸡犬相闻。其中往来种作，男女衣着，悉如外人。黄发垂髫，并怡然自乐。 　　见渔人，乃大惊，问所从来。具答之。便要还家，设酒杀鸡作食。村中闻有此人，咸来问讯。自云先世避秦时乱，率妻子邑人来此绝境，不复出焉，遂与外人间隔。问今是何世，乃不知有汉，无论魏晋。此人一一为具言所闻，皆叹惋。余人各复延至其家，皆出酒食。停数日，辞去。此中人语云：“不足为外人道也。”(间隔 一作：隔绝) 　　既出，得其船，便扶向路，处处志之。及郡下，诣太守，说如此。太守即遣人随其往，寻向所志，遂迷，不复得路。 　　南阳刘子骥，高尚士也，闻之，欣然规往。未果，寻病终。后遂无问津者。 .
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Current File : //lib/python3.6/site-packages/cloudinit/simpletable.py
# Copyright (C) 2017 Amazon.com, Inc. or its affiliates
#
# Author: Ethan Faust <efaust@amazon.com>
# Author: Andrew Jorgensen <ajorgens@amazon.com>
#
# This file is part of cloud-init. See LICENSE file for license information.


class SimpleTable:
    """A minimal implementation of PrettyTable
    for distribution with cloud-init.
    """

    def __init__(self, fields):
        self.fields = fields
        self.rows = []

        # initialize list of 0s the same length
        # as the number of fields
        self.column_widths = [0] * len(self.fields)
        self.update_column_widths(fields)

    def update_column_widths(self, values):
        for i, value in enumerate(values):
            self.column_widths[i] = max(len(value), self.column_widths[i])

    def add_row(self, values):
        if len(values) > len(self.fields):
            raise TypeError("too many values")
        values = [str(value) for value in values]
        self.rows.append(values)
        self.update_column_widths(values)

    def _hdiv(self):
        """Returns a horizontal divider for the table."""
        return (
            "+" + "+".join(["-" * (w + 2) for w in self.column_widths]) + "+"
        )

    def _row(self, row):
        """Returns a formatted row."""
        return (
            "|"
            + "|".join(
                [
                    col.center(self.column_widths[i] + 2)
                    for i, col in enumerate(row)
                ]
            )
            + "|"
        )

    def __str__(self):
        """Returns a string representation of the table with lines around.

        +-----+-----+
        | one | two |
        +-----+-----+
        |  1  |  2  |
        |  01 |  10 |
        +-----+-----+
        """
        lines = [self._hdiv(), self._row(self.fields), self._hdiv()]
        lines += [self._row(r) for r in self.rows] + [self._hdiv()]
        return "\n".join(lines)

    def get_string(self):
        return self.__str__()

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