Fix flake8 issues

bilby/gw/conversion.py

@@ -619,7 +619,6 @@ def _generate_all_cbc_parameters(sample, defaults, base_conversion,
     output_sample = generate_mass_parameters(output_sample)
     output_sample = generate_spin_parameters(output_sample)
     output_sample = generate_source_frame_parameters(output_sample)
-    import IPython; IPython.embed()
     compute_snrs(output_sample, likelihood)
     return output_sample
 

bilby/gw/source.py

@@ -10,6 +10,12 @@ from .utils import (lalsim_SimInspiralTransformPrecessingNewInitialConditions,
                     lalsim_SimInspiralWaveformParamsInsertTidalLambda1,
                     lalsim_SimInspiralWaveformParamsInsertTidalLambda2)
 
+try:
+    import lal
+except ImportError:
+    logger.warning("You do not have lalsuite installed currently. You will"
+                   " not be able to use some of the prebuilt functions.")
+
 
 def lal_binary_black_hole(
         frequency_array, mass_1, mass_2, luminosity_distance, a_1, tilt_1, phi_12, a_2, tilt_2, phi_jl,