print('''
CURRENT PYTHON COMMANDS:
-----------------------------
line -- returns restframe wavelength of a line given a key
offset -- calculates the velocity offset between two redshifts
redshift -- calculates the redshift given a restframe & observed line
zlam -- redshifts a line given restframe wavelength and redshift
dered -- returns the rest wavelength given an observed line and redshift

sep -- returns the separation between two coordinates of same units
sepmix -- returns the separation between two coordinates of different units
coord -- converts given coordinates to a specified format
''')
