python - 用于 Python 的文本表格编写器/打印机

Question

TL;DR -> Is there a table writing module on PyPi (I've failed to find any) that takes in lists as parameters and makes a table out of those lists. I am asking this because I've looked on PyPI, but I have not found anything similar to actually printing strings or writing strings to files.

想象一下有很多统计数据，并且必须将它们整齐地写在表格中，就像这样，(我一直在尝试教一门关于不同排序算法之间差异的类(class))(另外，请注意此处给出的示例与下面给出的代码的输出不匹配。我这样做只是为了解释我想要什么，而不是制作大量必须滚动浏览的代码):

#########################
#   LENGTH ||| TIME(s)  #
#########################
#       0  ||| 0.00000  #
#     250  ||| 0.00600  #
#     500  ||| 0.02100  #
#     750  ||| 0.04999  #
#    1000  ||| 0.08699  #
#    1250  ||| 0.13499  #
#    1500  ||| 0.19599  #
#    1750  ||| 0.26900  #
#    2000  ||| 0.35099  #
#########################

理想情况下，我会写这样的东西来保存到文件中，如下所示。一组列表，一个列表包含一组值，另一个列表包含另一组对应值。

if __name__ == '__main__':
    with open(os.path.join(os.path.dirname(__file__), 'Sort Stats', 'stats_exp.txt'), 'w') as stats:
        stats.write(
            "O-######################==#######################==#######################==######################-O\n")
        stats.writelines(
            "|{0:^23}||{1:^23}||{2:^23}||{3:^23}|\n".format("Bubble Sort", "Insertion Sort", "Merge Sort (R)",
                                                            "Merge Sort (I)"))
        stats.write(
            "|#######################||#######################||#######################||#######################|\n")
        stats.write(
            "|   LENGTH  |  TIME(s)  ||   LENGTH  |  TIME(s)  ||   LENGTH  |  TIME(s)  ||   LENGTH  |  TIME(s)  |\n")
        stats.write(
            "|#######################||#######################||#######################||#######################|\n")
        for times_taken, t1, t2, t3, t4 in zip(total_lengths, sort_times_bubble, sort_times_ins, sort_times_merge_r,
                                               sort_times_merge_i):
            stats.write(
                "|{0:^11}|{1:^11}||{2:^11}|{3:^11}||{4:^11}|{5:^11}||{6:^11}|{7:^11}|\n"
                .format(
                    times_taken, str(t1)[:6],
                    times_taken, str(t2)[:6],
                    times_taken, str(t3)[:6],
                    times_taken, str(t4)[:6],
                )
            )
        stats.write(
            "O-######################==#######################==#######################==######################-O\n")

    print "Data writing complete"

如您所见，它并不十分漂亮，最重要的是它不容易扩展，因为它几乎可以打印出一些东西。

我想做的是为此创建一个模块并将其上传到 PyPI。但是，如果有人已经做了类似的东西，那将是浪费精力，我可以简单地 fork 他们的存储库，而不是实际上必须从头开始编写代码。

Answer 1

PrettyTable模块是你需要的:

PrettyTable is a simple Python library designed to make it quick and easy to represent tabular data in visually appealing ASCII tables.

>>> import prettytable
>>> x = prettytable.PrettyTable(["Length", "Time"])
>>> x.add_row([0, 0.00000])
>>> x.add_row([250, 0.00600]) 
>>> x.add_row([500, 0.02100]) 
>>> x.add_row([750, 0.04999])    
>>> print x
+--------+---------+
| Length |   Time  |
+--------+---------+
|   0    |   0.0   |
|  250   |  0.006  |
|  500   |  0.021  |
|  750   | 0.04999 |
+--------+---------+

或者，texttable :

texttable is a module to generate a formatted text table, using ASCII characters.

>>> import texttable
>>> x = texttable.Texttable()
>>> x.add_rows([["Length", "Time"], [0, 0.00000], [250, 0.00600], [500, 0.02100], [750, 0.04999]])
>>> print x.draw()
+--------+-------+
| Length | Time  |
+========+=======+
| 0      | 0     |
+--------+-------+
| 250    | 0.006 |
+--------+-------+
| 500    | 0.021 |
+--------+-------+
| 750    | 0.050 |
+--------+-------+

另见相关主题:How can I pretty-print ASCII tables with Python?