在findall搜索中使用变量

Question

Ok so I am reading a variable from a dictionary (DoL) I have created as such:

for i in DoL.keys():
    fobId = DoL["{}".format(i)]["FaceOuterBound"]

So lets say, on the first iteration through DoL:

fobId = 194

I have tried to create a regex findall expression which includes the variable fobId :

edgeloop_txt = re.findall(r'^#'+str(fobId)+r'.*#(\d+).*;', text)

In order to find the line in text which begins with # fobId :

#194 = FACE_OUTER_BOUND ( 'NONE', #159, .T. ) ;

And finally extract the number #159

My output print(edgeloop_txt) just gives me empty lists:

[]
[] 
[]
...

EDIT (providing an MCVE):

Sample text:

...
#190 = DIRECTION ( 'NONE',  ( -1.000000000000000000, -0.0000000000000000000, -0.0000000000000000000 ) ) ;
#191 = DATE_AND_TIME ( #277, #349 ) ;
#192 = ORIENTED_EDGE ( 'NONE', *, *, #253, .T. ) ;
#193 = CARTESIAN_POINT ( 'NONE',  ( 75.00000000000000000, 35.00000000000000000, 0.0000000000000000000 ) ) ;
#194 = FACE_OUTER_BOUND ( 'NONE', #159, .T. ) ;
#195 = ORIENTED_EDGE ( 'NONE', *, *, #205, .T. ) ;
#196 = CARTESIAN_POINT ( 'NONE',  ( 0.0000000000000000000, 35.00000000000000000, 0.0000000000000000000 ) ) ;
...

Code I am using:

for i in DoL.keys():
    fobId = DoL["{}".format(i)]["FaceOuterBound"]
    edgeloop_txt = re.findall(r'^#'+str(fobId)+r'.*#(\d+).*;', text)
    print(edgeloop_txt)

Where DoL is a dictionary as such:

{'Face0': {'AdvancedFace': 12, 'FaceOuterBound': 194, 'Plane': 326}, 
'Face1': {'AdvancedFace': 73, 'FaceOuterBound': 53, 'Plane': 230}, 
'Face2': {'AdvancedFace': 99, 'FaceOuterBound': 121, 'Plane': 123}, 
'Face3': {'AdvancedFace': 131, 'FaceOuterBound': 268, 'Plane': 270}, 
...
'Face9': {'AdvancedFace': 358, 'FaceOuterBound': 9, 'Plane': 363}}

Answer 1

Ok, so I think I've figured out your problem. You're using a large block of text but your regex has a ^ in it indicating beginning of line. The problem is you're not iterating over lines you're parsing the entire text at once and because you're doing that your regex line start character is preventing you from finding your matches.

Your options are to either iterate over your text line by line or simply remove the ^ from your regex.

Example of line by line iteration:

for key,val in DoL.items():
  fobId = val["FaceOuterBound"]
  matches = []
  for line in text.splitlines():
    # split text into lines and compare to each line
    response = re.match(r'^#'+str(fobId)+r'.*#(\d+).*;', line)
    # if a match was found, store it in list of matches
    if response: matches.append(response[1])
  print(matches) # ['159']