誰もこれがなぜコンパイルされないのか理解していますか？

Question

私はこのパターンで、SVGパスW3C SVG Pathsを解析しようとしています。編集：OK私のパターンを変更し、新しい問題のサンプルを持っています。新しいパターンで作業するにはいくつかのことがあります。私は今line_to正規表現に取り組んでいる、との値は一点のようにサポートすることができるSVG仕様の要求：のような多くのポイントへL100,200を：L100,200 100,400 0,100は、私はそれが仕事を得るように見えることはできません。私はinkscape_path2を解析しており、このような出力を受け取ります。

我々は唯一の出力の最初のタプルを見ている：

('L 6,82 6,14 6,12 ','L ','6','82','6','14','6','12')

：

('L 6,82 ','L ','6','82')

これは私が取得しようとしているものです：

これは私が取得していますものです

実際のコード：

from PyQt4.QtGui import QPainterPath 
import string,re 

inkscape_path1 = "M 12,6 C 8.676,6 6,8.676 6,12 l 0,2 0,68 0,2 c 0,0.334721 0.04135,0.6507 0.09375,0.96875 0.0487,0.295596 0.09704,0.596915 0.1875,0.875 0.00988,0.03038 0.020892,0.0636 0.03125,0.09375 0.098865,0.287771 0.2348802,0.547452 0.375,0.8125 0.1445918,0.273507 0.3156161,0.535615 0.5,0.78125 0.1843839,0.245635 0.3737765,0.473472 0.59375,0.6875 0.439947,0.428056 0.94291,0.814526 1.5,1.09375 0.278545,0.139612 0.5734731,0.246947 0.875,0.34375 -0.2562018,-0.100222 -0.4867109,-0.236272 -0.71875,-0.375 -0.00741,-0.0044 -0.023866,0.0045 -0.03125,0 -0.031933,-0.0193 -0.062293,-0.04251 -0.09375,-0.0625 -0.120395,-0.0767 -0.2310226,-0.163513 -0.34375,-0.25 -0.1061728,-0.0808 -0.2132809,-0.161112 -0.3125,-0.25 C 8.4783201,88.557317 8.3087904,88.373362 8.15625,88.1875 8.0486711,88.057245 7.9378561,87.922215 7.84375,87.78125 7.818661,87.74287 7.805304,87.69538 7.78125,87.65625 7.716487,87.553218 7.6510225,87.451733 7.59375,87.34375 7.4927417,87.149044 7.3880752,86.928049 7.3125,86.71875 7.30454,86.69694 7.288911,86.6782 7.28125,86.65625 7.2494249,86.5643 7.2454455,86.469419 7.21875,86.375 7.1884177,86.268382 7.1483606,86.171969 7.125,86.0625 7.0521214,85.720988 7,85.364295 7,85 L 7,83 7,15 7,13 C 7,10.218152 9.2181517,8 12,8 l 2,0 68,0 2,0 c 2.781848,0 5,2.218152 5,5 l 0,2 0,68 0,2 c 0,0.364295 -0.05212,0.720988 -0.125,1.0625 -0.04415,0.206893 -0.08838,0.397658 -0.15625,0.59375 -0.0077,0.02195 -0.0233,0.04069 -0.03125,0.0625 -0.06274,0.173739 -0.138383,0.367449 -0.21875,0.53125 -0.04158,0.0828 -0.07904,0.169954 -0.125,0.25 -0.0546,0.09721 -0.126774,0.18835 -0.1875,0.28125 -0.09411,0.140965 -0.204921,0.275995 -0.3125,0.40625 -0.143174,0.17445 -0.303141,0.346998 -0.46875,0.5 -0.01117,0.0102 -0.01998,0.02115 -0.03125,0.03125 -0.138386,0.125556 -0.285091,0.234436 -0.4375,0.34375 -0.102571,0.07315 -0.204318,0.153364 -0.3125,0.21875 -0.0074,0.0045 -0.02384,-0.0044 -0.03125,0 -0.232039,0.138728 -0.462548,0.274778 -0.71875,0.375 0.301527,-0.0968 0.596455,-0.204138 0.875,-0.34375 0.55709,-0.279224 1.060053,-0.665694 1.5,-1.09375 0.219973,-0.214028 0.409366,-0.441865 0.59375,-0.6875 0.184384,-0.245635 0.355408,-0.507743 0.5,-0.78125 0.14012,-0.265048 0.276135,-0.524729 0.375,-0.8125 0.01041,-0.03078 0.02133,-0.06274 0.03125,-0.09375 0.09046,-0.278085 0.1388,-0.579404 0.1875,-0.875 C 89.95865,84.6507 90,84.334721 90,84 l 0,-2 0,-68 0,-2 C 90,8.676 87.324,6 84,6 L 12,6 z" 

inkscape_path2 = "M 12,90 C 8.676,90 6,87.324 6,84 L 6,82 6,14 6,12 c 0,-0.334721 0.04135,-0.6507 0.09375,-0.96875 0.0487,-0.295596 0.09704,-0.596915 0.1875,-0.875 C 6.29113,10.12587 6.302142,10.09265 6.3125,10.0625 6.411365,9.774729 6.5473802,9.515048 6.6875,9.25 6.8320918,8.976493 7.0031161,8.714385 7.1875,8.46875 7.3718839,8.223115 7.5612765,7.995278 7.78125,7.78125 8.221197,7.353194 8.72416,6.966724 9.28125,6.6875 9.559795,6.547888 9.8547231,6.440553 10.15625,6.34375 9.9000482,6.443972 9.6695391,6.580022 9.4375,6.71875 c -0.00741,0.0044 -0.023866,-0.0045 -0.03125,0 -0.031933,0.0193 -0.062293,0.04251 -0.09375,0.0625 -0.120395,0.0767 -0.2310226,0.163513 -0.34375,0.25 -0.1061728,0.0808 -0.2132809,0.161112 -0.3125,0.25 C 8.4783201,7.442683 8.3087904,7.626638 8.15625,7.8125 8.0486711,7.942755 7.9378561,8.077785 7.84375,8.21875 7.818661,8.25713 7.805304,8.30462 7.78125,8.34375 7.716487,8.446782 7.6510225,8.548267 7.59375,8.65625 7.4927417,8.850956 7.3880752,9.071951 7.3125,9.28125 7.30454,9.30306 7.288911,9.3218 7.28125,9.34375 7.2494249,9.4357 7.2454455,9.530581 7.21875,9.625 7.1884177,9.731618 7.1483606,9.828031 7.125,9.9375 7.0521214,10.279012 7,10.635705 7,11 l 0,2 0,68 0,2 c 0,2.781848 2.2181517,5 5,5 l 2,0 68,0 2,0 c 2.781848,0 5,-2.218152 5,-5 l 0,-2 0,-68 0,-2 C 89,10.635705 88.94788,10.279012 88.875,9.9375 88.83085,9.730607 88.78662,9.539842 88.71875,9.34375 88.71105,9.3218 88.69545,9.30306 88.6875,9.28125 88.62476,9.107511 88.549117,8.913801 88.46875,8.75 88.42717,8.6672 88.38971,8.580046 88.34375,8.5 88.28915,8.40279 88.216976,8.31165 88.15625,8.21875 88.06214,8.077785 87.951329,7.942755 87.84375,7.8125 87.700576,7.63805 87.540609,7.465502 87.375,7.3125 87.36383,7.3023 87.35502,7.29135 87.34375,7.28125 87.205364,7.155694 87.058659,7.046814 86.90625,6.9375 86.803679,6.86435 86.701932,6.784136 86.59375,6.71875 c -0.0074,-0.0045 -0.02384,0.0044 -0.03125,0 -0.232039,-0.138728 -0.462548,-0.274778 -0.71875,-0.375 0.301527,0.0968 0.596455,0.204138 0.875,0.34375 0.55709,0.279224 1.060053,0.665694 1.5,1.09375 0.219973,0.214028 0.409366,0.441865 0.59375,0.6875 0.184384,0.245635 0.355408,0.507743 0.5,0.78125 0.14012,0.265048 0.276135,0.524729 0.375,0.8125 0.01041,0.03078 0.02133,0.06274 0.03125,0.09375 0.09046,0.278085 0.1388,0.579404 0.1875,0.875 C 89.95865,11.3493 90,11.665279 90,12 l 0,2 0,68 0,2 c 0,3.324 -2.676,6 -6,6 l -72,0 z" 
w3c_path1 = "M100,200 C100,100 250,100 250,200 S400,300 400,200" 
w3c_path2 = ''' 
      M600,350 l 50,-25 \n 
      a25,25 -30 0,1 50,-25 l 50,-25 \n 
      a25,50 -30 0,1 50,-25 l 50,-25 \n 
      a25,75 -30 0,1 50,-25 l 50,-25 \n 
      a25,100 -30 0,1 50,-25 l 50,-25 \n 
      ''' 

    if __name__ == '__main__': 
    data = inkscape_path2 
    assert re.match('M', data) 
    integer = r'-\d+|\d+' # A negative or positive set of digits of unknown length 
    float = r'-\d+\.\d+|\d+\.\d+' # The same as above but looks for a decimal 
    number = r'({}|{})'.format(integer, float) 
    point = r'{},{}'.format(number, number) 
    move_to = r'([Mm]\s*){}'.format(point) 
    line_to = r'(([Ll]\s*){}+\s)'.format(point) 
    curve_to = r'(([Cc]\s*){}\s{}\s{})'.format(point, point, point) 
    t = re.findall(line_to, data) 
    for token in t: # we're only testing line_to right now move_to some what works. 
     print(token) 
    print(data) 
    print(line_to) 

Answer 1

コード、実際のエラーメッセージ、サンプル入力などは一切提供していません。だから、僕は推測するつもりです：

私はあなたが一致グループの外に?P<label>構文を使用することができます信じていません。あなたがこれを持っているときに：

?P<point>(\d[(,)|\s]\d) 

は、あなたが実際にこれらを必要とする：

(?P<point>(\d[(,)|\s]\d)) 

お知らせ式全体を囲む余計な括弧が。ちょうどこの例に取る：

>>> re.compile('''?P<point>(\d[(,)|\s]\d)''') 
Traceback (most recent call last): 
    File "<stdin>", line 1, in <module> 
    File "/usr/lib64/python2.7/re.py", line 190, in compile 
    return _compile(pattern, flags) 
    File "/usr/lib64/python2.7/re.py", line 244, in _compile 
    raise error, v # invalid expression 
sre_constants.error: nothing to repeat 

対：

>>> re.compile('''(?P<point>(\d[(,)|\s]\d))''') 
<_sre.SRE_Pattern object at 0x7f8b14a3fa80>