É assim que o arquivo se parece

5.0000E+02   5.23744E-06  0.0006
1.0600E+03   2.15119E-06  0.0023
1.6900E+03   1.83529E-06  0.0035
2.4000E+03   1.76455E-06  0.0044
3.1900E+03   1.78831E-06  0.0050
4.0800E+03   1.86632E-06  0.0056
5.0800E+03   1.91086E-06  0.0061
6.1900E+03   1.97899E-06  0.0066   <--- Get data from here...
7.4300E+03   2.03105E-06  0.0070
8.8400E+03   2.08666E-06  0.0074
1.0400E+04   2.12723E-06  0.0078
1.2200E+04   2.20352E-06  0.0081
1.4100E+04   2.02335E-06  0.0089
1.6400E+04   1.98286E-06  0.0094
1.8900E+04   1.58478E-06  0.0107
2.1700E+04   1.09529E-06  0.0133
2.4900E+04   6.59218E-07  0.0173
2.8500E+04   3.19703E-07  0.0250
3.2500E+04   1.55052E-07  0.0358
3.7000E+04   6.94320E-08  0.0542
4.2100E+04   3.44175E-08  0.0764
4.7800E+04   2.37904E-08  0.0944
5.4200E+04   1.29016E-08  0.1283
6.1400E+04   5.45355E-09  0.1770
6.9500E+04   4.18030E-09  0.2486
7.8700E+04   2.47747E-09  0.2629
8.8900E+04   2.69887E-09  0.2820
1.0100E+05   2.15937E-09  0.4286
1.1300E+05   4.39994E-10  0.7824
1.2800E+05   0.00000E+00  0.0000
1.4400E+05   0.00000E+00  0.0000
1.6300E+05   0.00000E+00  0.0000
1.8300E+05   0.00000E+00  0.0000
2.0700E+05   0.00000E+00  0.0000
2.3300E+05   0.00000E+00  0.0000
2.6300E+05   0.00000E+00  0.0000
2.9600E+05   0.00000E+00  0.0000   <--- ...to here 
3.3300E+05   0.00000E+00  0.0000
3.7600E+05   0.00000E+00  0.0000
4.2300E+05   0.00000E+00  0.0000
4.7600E+05   0.00000E+00  0.0000
5.3600E+05   0.00000E+00  0.0000
6.0400E+05   0.00000E+00  0.0000
6.8000E+05   0.00000E+00  0.0000
7.6500E+05   0.00000E+00  0.0000
8.6100E+05   0.00000E+00  0.0000
9.6900E+05   0.00000E+00  0.0000
1.0900E+06   0.00000E+00  0.0000
1.2200E+06   0.00000E+00  0.0000
1.3800E+06   0.00000E+00  0.0000
1.5500E+06   0.00000E+00  0.0000
1.7500E+06   0.00000E+00  0.0000
1.9700E+06   0.00000E+00  0.0000
2.2100E+06   0.00000E+00  0.0000
2.5000E+06   0.00000E+00  0.0000
2.8000E+06   0.00000E+00  0.0000
3.1500E+06   0.00000E+00  0.0000
3.5400E+06   0.00000E+00  0.0000
3.9900E+06   0.00000E+00  0.0000
4.4900E+06   0.00000E+00  0.0000
5.0500E+06   0.00000E+00  0.0000
5.6800E+06   0.00000E+00  0.0000
6.3900E+06   0.00000E+00  0.0000
1.0000E+07   0.00000E+00  0.0000

Então, o script Python obteria esses dados:

6.1900E+03   1.97899E-06  0.0066  
7.4300E+03   2.03105E-06  0.0070
8.8400E+03   2.08666E-06  0.0074
1.0400E+04   2.12723E-06  0.0078
1.2200E+04   2.20352E-06  0.0081
1.4100E+04   2.02335E-06  0.0089
1.6400E+04   1.98286E-06  0.0094
1.8900E+04   1.58478E-06  0.0107
2.1700E+04   1.09529E-06  0.0133
2.4900E+04   6.59218E-07  0.0173
2.8500E+04   3.19703E-07  0.0250
3.2500E+04   1.55052E-07  0.0358
3.7000E+04   6.94320E-08  0.0542
4.2100E+04   3.44175E-08  0.0764
4.7800E+04   2.37904E-08  0.0944
5.4200E+04   1.29016E-08  0.1283
6.1400E+04   5.45355E-09  0.1770
6.9500E+04   4.18030E-09  0.2486
7.8700E+04   2.47747E-09  0.2629
8.8900E+04   2.69887E-09  0.2820
1.0100E+05   2.15937E-09  0.4286
1.1300E+05   4.39994E-10  0.7824
1.2800E+05   0.00000E+00  0.0000
1.4400E+05   0.00000E+00  0.0000
1.6300E+05   0.00000E+00  0.0000
1.8300E+05   0.00000E+00  0.0000
2.0700E+05   0.00000E+00  0.0000
2.3300E+05   0.00000E+00  0.0000
2.6300E+05   0.00000E+00  0.0000
2.9600E+05   0.00000E+00  0.0000

Então eu preciso da soma da coluna central.

Assim: (1,97899E-06 + 2,03105E-06 + 2,08666E-06 + ... + 0,00000E + 00) = 1,90994E-05

Apenas a segunda coluna é importante para esse problema.

A primeira coluna representa o tempo. A segunda coluna representa alguns números de dados. A terceira coluna representa alguns números aleatórios.

por favor me ajude a descobrir: ((