Question

我有这个清单。我想创建一个for循环，该循环将在列表中这些文件的功能组合中使用。

我不确定如何进行这些组合，以便对每个“检查”都采用正确的组合。

该函数，如果不是用于循环，则将如下所示：

erase('check3_dwg_Polyline','check3_dwg_Polyline_feat_to_polyg_feat_to_line','output_name')

我尝试过的事情：

这是列表。

li=['check3_dwg_Polyline', 'check2_dwg_Polyline', 
'check3_dwg_Polyline_feat_to_polyg',# this will not be needed to extracted
'check2_dwg_Polyline_feat_to_polyg',# >> >>
'check3_dwg_Polyline_feat_to_polyg_feat_to_line', 
 'check2_dwg_Polyline_feat_to_polyg_feat_to_line']

从此开始：

a=[li[i:i+3] for i in range(0, len(li), 3)]

其中返回：

[['check3_dwg_Polyline',
  'check2_dwg_Polyline',
  'check3_dwg_Polyline_feat_to_polyg'],
 ['check2_dwg_Polyline_feat_to_polyg',
  'check3_dwg_Polyline_feat_to_polyg_feat_to_line',
  'check2_dwg_Polyline_feat_to_polyg_feat_to_line']]

最后：

for base, base_f, base_line in a:
    print(base, base_line, base + "_output")

给予：

check3_dwg_Polyline  check3_dwg_Polyline_feat_to_polyg  check3_dwg_Polyline_output
check2_dwg_Polyline_feat_to_polyg  check2_dwg_Polyline_feat_to_polyg_feat_to_line  check2_dwg_Polyline_feat_to_polyg_output

其他方法：

base = [f for f in li if not f.endswith(("_polyg", "_to_line"))]
base_f = {f.strip("_feat_to_polyg"): f for f in li if f.endswith("_polyg")}
base_line = {f.strip("_feat_to_polyg_feat_to_line"): f for f in li if f.endswith("_to_line")}
[(b, base_f[b], base_line[b]) for b in base]

给予：

KeyError: 'check3_dwg_Polyline'

我已经尝试过对列表进行排序，但是经过上述过程后，它只是以不同的方式破坏了列表。

理想的结果是

尝试时：

for base, base_f, base_line in a:
    print(base, base_line, base + "_output")

为此：

check3_dwg_Polyline   check3_dwg_Polyline_feat_to_polyg_feat_to_line  check3_dwg_Polyline_output

check2_dwg_Polyline   check2_dwg_Polyline_feat_to_polyg_feat_to_line  check2_dwg_Polyline_output

将放在这样的地方：

erase('check3_dwg_Polyline','check3_dwg_Polyline_feat_to_polyg_feat_to_line','output_name')

Answer 1

zip将该列表分成 check3 ， check2 块……然后即可进行 for 循环。

n = len(li) // 3
a = zip(*[li[i:i+n] for i in range(0, len(li), n)])

（{pprint(list(a))将输出

[('check3_dwg_Polyline',
  'check3_dwg_Polyline_feat_to_polyg',
  'check3_dwg_Polyline_feat_to_polyg_feat_to_line'),
 ('check2_dwg_Polyline',
  'check2_dwg_Polyline_feat_to_polyg',
  'check2_dwg_Polyline_feat_to_polyg_feat_to_line')]

按模式从列表中获取某些文件

1 个答案: