What are the uses of the python 'pass' statement?

In some languages, we can have empty (do nothing) blocks like below.
if a==ture
{
   //do something
}
else
{
  //do nothing
}


#Python doesn't support empty blocks.

In python, following block gives error

a = True

if a is True:
    print ('condition is true')
else:
     

A 'pass' will need to be used in such cases.

a = True

if a is True:

    print ('condition is true')

#a block without any statements is invalid in python. In such cases,

# we need to use 'pass'

else:

    pass

Note: this is one of the reason why 'pass' is needed. There may be others.