如何将漂亮的打印模块扩展到表格？

Question

我有漂亮的打印模块,我准备,因为我不高兴pprint模块生成zillion行的数字列表有一个列表列表.以下是我的模块的示例用法.

    >>> a=range(10)
    >>> a.insert(5,[range(i) for i in range(10)])
    >>> a
    [0, 1, 2, 3, 4, [[], [0], [0, 1], [0, 1, 2], [0, 1, 2, 3], [0, 1, 2, 3, 4], [0, 1, 2, 3, 4, 5], [0, 1, 2, 3, 4, 5, 6], [0, 1, 2, 3, 4, 5, 6, 7], [0, 1, 2, 3, 4, 5, 6, 7, 8]], 5, 6, 7, 8, 9]
    >>> import pretty
    >>> pretty.ppr(a,indent=6)

    [0, 1, 2, 3, 4, 
          [
            [], 
            [0], 
            [0, 1], 
            [0, 1, 2], 
            [0, 1, 2, 3], 
            [0, 1, 2, 3, 4], 
            [0, 1, 2, 3, 4, 5], 
            [0, 1, 2, 3, 4, 5, 6], 
            [0, 1, 2, 3, 4, 5, 6, 7], 
            [0, 1, 2, 3, 4, 5, 6, 7, 8]], 5, 6, 7, 8, 9]

代码是这样的:

""" pretty.py prettyprint module version alpha 0.2
    mypr: pretty string function
    ppr:  print of the pretty string
    ONLY list and tuple prettying implemented!
"""
def mypr(w, i = 0, indent = 2, nl = '\n') :
    """ w = datastructure, i = indent level, indent = step size for indention """
    startend = {list : '[]', tuple : '()'}
    if type(w) in (list, tuple) :
        start, end = startend[type(w)]
        pr = [mypr(j, i + indent, indent, nl) for j in w]
        return nl + ' ' * i + start + ', '.join(pr) + end
    else :  return repr(w)

def ppr(w, i = 0, indent = 2, nl = '\n') :
    """ see mypr, this is only print of mypr with same parameters """
    print mypr(w, i, indent, nl)

这是我的漂亮打印模块中一个用于表打印的固定文本:

## let's do it "manually"
width = len(str(10+10))
widthformat = '%'+str(width)+'i'
for i in range(10):
    for j in range(10):
        print widthformat % (i+j),
    print

你有没有更好的替代方案来使这个代码对于漂亮的打印模块足够概括？

在发布问题后我发现这种常规案例的是这个模块:prettytable一个简单的Python库,用于以视觉上吸引人的ASCII表格格式轻松显示表格数据

Answer 1

如果你正在为矩阵寻找好的格式,那么numpy的输出看起来很棒:

from numpy import *
print array([[i + j for i in range(10)] for j in range(10)])

输出:

[[ 0  1  2  3  4  5  6  7  8  9]
 [ 1  2  3  4  5  6  7  8  9 10]
 [ 2  3  4  5  6  7  8  9 10 11]
 [ 3  4  5  6  7  8  9 10 11 12]
 [ 4  5  6  7  8  9 10 11 12 13]
 [ 5  6  7  8  9 10 11 12 13 14]
 [ 6  7  8  9 10 11 12 13 14 15]
 [ 7  8  9 10 11 12 13 14 15 16]
 [ 8  9 10 11 12 13 14 15 16 17]
 [ 9 10 11 12 13 14 15 16 17 18]]