regex - Python: Using re module to find string, then print values under string -


i attempting use re module search string of large file. file searching has following format:

      220       box 1,  step 1       c        15.1760586379       13.7666285127        4.1579861659       f        13.7752750995       13.3845518556        4.1992254467       f        15.1122807811       15.0753387163        3.8457966464       h        15.5298304628       13.5873563855        5.1615910859       h        15.6594416869       13.1246597008        3.3754112615         5      box 2,  step 1      c        15.1760586379       13.7666285127        4.1579861659      f        13.7752750995       13.3845518556        4.1992254467      f        15.1122807811       15.0753387163        3.8457966464      h        15.5298304628       13.5873563855        5.1615910859      h        15.6594416869       13.1246597008        3.3754112615        240      box 1,  step 2      c        12.6851133069        2.8636250164        1.1788963097      f        11.7935769268        1.7912366066        1.3042188034      f        13.7887138736        2.3739304018        0.4126088380      h        12.1153838312        3.7024696077        0.7164304431      h        13.0962656950        3.1549047758        2.1436863477      c        12.6745394723        3.6338848332       15.1374252921      f        11.8703828307        4.3473226569       16.0480492173      f        12.2304604843        2.3709059503       14.9433964493      h        12.6002811971        4.1968554204       14.1449118786      h        13.7469256153        3.6086212350       15.5204655285

this format continues on box 1 , box 2 ~30000 steps total, each box. have code utilizes re module searches file based on keyword "step". unfortunately, not yield results when run it. need code search 1) only box 1, 2) print/output coordinates(preferably omitting "c's, f's, h's"; coordinates) beginning after step 1 file, 3) increment "step" number 48 , repeat 2). want ignore "5" , "240" in file searching; code should compensate not included in output after search file. have far (it not work):

 import re  shakes = open("mc_coordinates", "r")  = 1  line in shakes:         if re.match("(.*)step i(.*)", line):                print line         i+=48

this example of what code do:

  step 1     15.1760586379       13.7666285127        4.1579861659     13.7752750995       13.3845518556        4.1992254467     15.1122807811       15.0753387163        3.8457966464     15.5298304628       13.5873563855        5.1615910859     15.6594416869       13.1246597008        3.3754112615     step 49     12.6851133069        2.8636250164        1.1788963097     11.7935769268        1.7912366066        1.3042188034     13.7887138736        2.3739304018        0.4126088380     12.1153838312        3.7024696077        0.7164304431     13.0962656950        3.1549047758        2.1436863477     12.6745394723        3.6338848332       15.1374252921     11.8703828307        4.3473226569       16.0480492173     12.2304604843        2.3709059503       14.9433964493     12.6002811971        4.1968554204       14.1449118786     13.7469256153        3.6086212350       15.5204655285   step 97     15.1760586379       13.7666285127        4.1579861659     13.7752750995       13.3845518556        4.1992254467     15.1122807811       15.0753387163        3.8457966464     15.5298304628       13.5873563855        5.1615910859     15.6594416869       13.1246597008        3.3754112615

it should noted condensed version, typically there ~250 lines of coordinates in between "step" numbers. ideas or thought appreciated. thanks!!

a quick although maybe not efficent way parse line line , add states.

# untested code, think idea import re shakes = open("mc_coordinates", "r") = 1 output = false # in block should output? line in shakes:     if re.match("(.*)step i(.*)", line): # tune match box 1         print line         output = true         i+=48     elif re.match("(.*)step i(.*)", line):         # other box or step         output = false     elif output:         print line # or remove first few chars rid of c,f or hs.

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