对从.txt文件获取的变量使用obspy.taup

Question

我是Python的新手，我正在尝试在obspy包的一个模块中执行代码。来自一个.txt文件，其中一行包含五个用逗号分隔的值(例如: 40,47.698,146.9212，等等...)我需要在obspy模块的函数中使用这些值作为变量。我会给你看代码，这样你就能更好地理解。

from obspy.taup import TauPyModel
model = TauPyModel(model="iasp91")

archivo=open('Dato.txt', 'r')
for linea in archivo.readlines():
    columna = str(linea).split(',')
    print(columna[0])
    print(columna[1])
    print(columna[2])
    print(columna[3])
    print(columna[4])
archivo.close()

a=columna[0]
b=columna[1]
c=columna[2]
d=columna[3]
e=columna[4]

arrivals=model.get_pierce_points_geo(a, b, c, d, e, phase_list=('SKS',), resample=False)

arrival = arrivals[0]

print(arrival.pierce)

如果我将变量定义为数值(example:a=408；b=47.6981；c=146.9212；等)…。)代码运行完美，它向我展示了我想要的：

408
47.6981
146.9212
36.882277
-3.068689
C:\Users\peopl\Desktop\BO\env\lib\site-packages\obspy\taup\tau_branch.py:496: UserWarning: Resizing a TauP array inplace failed due to the existence of other references to the array, creating a new array. See Obspy #2280.
  warnings.warn(msg)
[ ( 323.37738085,   0.00000000e+00,   0.00000000e+00,   408.        ,  47.6981    ,  146.9212    )
 ( 323.37738085,   4.25942791e-01,   9.18383444e-05,   410.        ,  47.70292225,  146.9180712 )
 ( 323.37738085,   4.95211705e+01,   1.33680904e-02,   660.        ,  48.39912219,  146.45957792)
 ( 323.37738085,   4.30994629e+02,   3.09568047e-01,  2889.        ,  63.17117462,  131.25054174)
 ( 323.37738085,   6.19102877e+02,   7.88455257e-01,  3482.54497821,  73.50766588,   55.65029149)
 ( 323.37738085,   8.07211124e+02,   1.26734247e+00,  2889.        ,  54.05973754,    7.50927585)
 ( 323.37738085,   1.18868458e+03,   1.56354242e+00,   660.        ,  38.47340944,   -2.34102958)
 ( 323.37738085,   1.23777981e+03,   1.57681868e+00,   410.        ,  37.75869395,   -2.67200616)
 ( 323.37738085,   1.23820575e+03,   1.57691051e+00,   408.        ,  37.75374671,   -2.67427329)
 ( 323.37738085,   1.28179336e+03,   1.58536568e+00,   210.        ,  37.29809076,   -2.88171143)
 ( 323.37738085,   1.32180477e+03,   1.59207012e+00,    35.        ,  36.93652754,   -3.04441779)
 ( 323.37738085,   1.32587993e+03,   1.59253065e+00,    20.        ,  36.91168346,   -3.05553737)
 ( 323.37738085,   1.33192110e+03,   1.59307573e+00,     0.        ,  36.882277  ,   -3.068689  )]

然而，当我使用.txt文件中的变量时，代码显示如下：

408
47.6981
146.9212
36.882277
-3.068689
Traceback (most recent call last):
  File "pierce.py", line 20, in <module>
    arrivals=model.get_pierce_points_geo(a, b, c, d, e, phase_list=('SKS',), resample=False)
  File "C:\Users\peopl\Desktop\BO\env\lib\site-packages\obspy\taup\tau.py", line 784, in get_pierce_points_geo
    distance_in_deg = calc_dist(source_latitude_in_deg,
  File "C:\Users\peopl\Desktop\BO\env\lib\site-packages\obspy\taup\taup_geo.py", line 53, in calc_dist
    return calc_dist_azi(source_latitude_in_deg, source_longitude_in_deg,
  File "C:\Users\peopl\Desktop\BO\env\lib\site-packages\obspy\taup\taup_geo.py", line 86, in calc_dist_azi
    g = ellipsoid.Inverse(source_latitude_in_deg,
  File "C:\Users\peopl\Desktop\BO\env\lib\site-packages\geographiclib\geodesic.py", line 1035, in Inverse
    a12, s12, salp1,calp1, salp2,calp2, m12, M12, M21, S12 = self._GenInverse(
  File "C:\Users\peopl\Desktop\BO\env\lib\site-packages\geographiclib\geodesic.py", line 712, in _GenInverse
    lon12, lon12s = Math.AngDiff(lon1, lon2)
  File "C:\Users\peopl\Desktop\BO\env\lib\site-packages\geographiclib\geomath.py", line 156, in AngDiff
    d, t = Math.sum(Math.AngNormalize(-x), Math.AngNormalize(y))
TypeError: bad operand type for unary -: 'str'

前五行的数值与.txt文件中的数值相同，但似乎显示'str‘有问题。如果你能帮我解决这个问题，我会很高兴的。对不起，我的Arcaic英语和我的Python小说状态。

非常感谢并向你们所有人致以问候。

Answer 1

多亏了西班牙社区的另一个男孩，我才解决了这个问题。我必须将变量转换为数值，因为代码将其读取为字符串。我用这个改变解决了这个问题：

a = float(columna[0])
b = float(columna[1])
c = float(columna[2])
d = float(columna[3])
e = float(columna[4])

感谢所有人，我希望继续我的学习(用Python编程和用英语写作)。