How to extract perticlar line from text file using python : I am new in python programming. I have a text file having following content
9.0 4.000000000001712e-05
8.996 0.009553763042602704
8.976 0.005684452508893222
8.96 -0.00353920143256147
8.956 -0.0044586273593916585
8.936 -0.012284767416576208
8.916 -0.019094598621809324
8.9 -0.020204776832571356
I have to extract each line starting with single point decimal number and write these numbers in a new file. 
like: 
9.0 4.000000000001712e-05
8.9 -0.020204776832571356
