如何在python中从字符串中隔离某些数字

Question

'8 -9.7521970601311E-5 1237.16 1265.50" spec2 = "2 59 0 9810.07016902'

从上面的例子中，我只想提取值-9.7521970601311E-5。我该怎么做？

Answer 1

>>> str1 = '8 -9.7521970601311E-5 1237.16 1265.50" spec2 = "2 59 0 9810.07016902'
>>> float(str1.split()[1])
-9.7521970601311e-05

Answer 2

您可以通过索引实现：

y = '8 -9.7521970601311E-5 1237.16 1265.50" spec2 = "2 59 0 9810.07016902'
x = y[2:21]
print(x)