我想用一行中独立的数字拆分此文本。
1
root -0.307087 17.6356 -28.2214 2.36076 1.44212 -4.54601
lowerback 15.4094 -0.182495 1.65268
upperback 1.54579 0.0318172 -0.110122
thorax -6.9977 -0.0335751 -1.06068
lowerneck -3.24163 -0.676991 -1.34632
upperneck -9.28199 -0.818331 1.08102
head -2.3551 -0.388697 0.578143
rclavicle 1.74931e-014 -4.77083e-015
rhumerus -42.2757 19.3184 -90.6312
rradius 79.2191
rwrist 2.46902
rhand -35.8906 32.487
rfingers 7.12502
rthumb -9.00425 2.69918
lclavicle 1.74931e-014 -4.77083e-015
lhumerus -46.581 -10.5126 91.072
lradius 108.082
lwrist 30.7395
lhand -39.5085 13.512
lfingers 7.12502
lthumb -12.4939 43.1185
rfemur 4.30283 -1.72433 25.7796
rtibia 82.7602
rfoot 27.83 -8.73877
rtoes 20.2614
lfemur -27.49 -2.09007 -20.1015
ltibia 38.398
lfoot -7.19848 -5.78026
ltoes 5.97973
2
root -0.303728 17.5624 -27.7253 2.02549 1.77071 -4.33872
lowerback 16.0608 -0.380636 1.35189
upperback 1.68665 -0.267024 -0.0539964
thorax -7.21419 -0.169571 -0.765959
lowerneck -2.88855 -0.493739 -1.55908
upperneck -9.88628 -0.567977 1.15901
head -2.623 -0.258251 0.642519
rclavicle -7.65321e-015 -2.38542e-015
rhumerus -42.619 18.2084 -90.2387
rradius 76.8375
rwrist 5.33346
rhand -37.643 32.4997
rfingers 7.12502
rthumb -10.695 2.7919
lclavicle -7.65321e-015 -2.38542e-015
lhumerus -43.8177 -11.0502 91.3641
lradius 108.431
lwrist 30.2025
lhand -38.9758 12.3082
lfingers 7.12502
lthumb -11.9803 41.9454
rfemur 1.76685 -3.0026 24.5235
rtibia 87.0878
rfoot 27.0955 -9.32294
rtoes 22.2194
lfemur -26.5572 -2.78834 -20.4876
ltibia 40.7855
lfoot -10.1476 -3.85256
ltoes 0.48001
3
root -0.294208 17.4728 -27.2384 1.62853 1.94279 -4.06517
lowerback 16.9292 -0.51999 1.14183
upperback 1.81465 -0.483798 -0.143209
thorax -7.55951 -0.270454 -0.690263
lowerneck -2.59928 -0.313935 -1.56078
upperneck -10.5834 -0.320817 1.24057
head -2.91503 -0.136576 0.671345
rclavicle -1.54058e-014 -3.97569e-015
rhumerus -42.9367 16.607 -89.7942
rradius 74.9122
rwrist 7.29535
rhand -38.4744 33.0964
rfingers 7.12502
rthumb -11.4968 3.43167
lclavicle -1.54058e-014 -3.97569e-015
lhumerus -40.8446 -11.9999 91.445
lradius 108.671
lwrist 29.7854
lhand -38.5919 11.658
lfingers 7.12502
lthumb -11.6101 41.3163
rfemur -0.94671 -4.033 23.2605
rtibia 91.2781
rfoot 26.5333 -9.15277
rtoes 23.1538
lfemur -25.0499 -3.27418 -20.9658
ltibia 42.1017
lfoot -12.067 -2.99804
ltoes -2.17676
理想情况下，我希望获取独立数字之间的内容，不包括数字。 我试过这条规则:
r"[0-9]+(?<=)[\r\n]"
我想在其中找到前面没有任何内容的数字，后跟一个新行。
执行此操作的正确规则是什么？
请您参考如下方法:
您的正则表达式尝试无法工作，原因有多种，例如，它消耗了十进制数的数字，因为它不是以换行符开头的。前瞻也毫无意义(似乎是空的)，您不需要它。
我会用“数字”正则表达式拆分，包含在 2 个换行符之间(在换行符之前有可选的回车符以防万一)
测试:
import re
text = """rfoot 27.0955 -9.32294
lfoot -10.1476 -3.85256
ltoes 0.48001
3
root -0.294208 17.4728 -27.2384 1.62853 1.94279 -4.06517
rwrist 7.29535
5
rhand -38.4744 33.0964
lradius 108.671
lwrist 29.7854"""
print(re.split(r"\r?\n\d+\r?\n",text))
result: ['rfoot 27.0955 -9.32294\nlfoot -10.1476 -3.85256\nltoes 0.48001', 'root -0.294208 17.4728 -27.2384 1.62853 1.94279 -4.06517\nrwrist 7.29535', 'rhand -38.4744 33.0964\nlradius 108.671\nlwrist 29.7854']
请注意，这种简单的方法无法处理文本在一行中仅以数字开头或结尾的情况。我们必须通过添加 ^| 和 |$ 情况使其稍微复杂一些，但在那种情况下，我们会遗漏单个换行符和空字段。因此，我们可以应用更正列表理解来过滤掉“空白”字段(不过，也许可以使用纯正则表达式来完成):
text = """1
rfoot 27.0955 -9.32294
lfoot -10.1476 -3.85256
ltoes 0.48001
3
root -0.294208 17.4728 -27.2384 1.62853 1.94279 -4.06517
rwrist 7.29535
5
rhand -38.4744 33.0964
lradius 108.671
lwrist 29.7854
4"""
print([x for x in re.split(r"(^|\r?\n)\d+(\r?\n|$)",text) if x.strip()])
结果:
['rfoot 27.0955 -9.32294\nlfoot -10.1476 -3.85256\nltoes 0.48001', 'root -0.294208 17.4728 -27.2384 1.62853 1.94279 -4.06517\nrwrist 7.29535', 'rhand -38.4744 33.0964\nlradius 108.671\nlwrist 29.7854']
