remove from list if not maches in list
>>sents = ['@$\tthis sentences needs to be removed', 'this doesnt',
'@$\tthis sentences also needs to be removed',
'@$\tthis sentences must be removed', 'this shouldnt',
'# this needs to be removed', 'this isnt',
'# this must', 'this musnt']
>>>[x for x in sents if not x.startswith('@$\t') and not x.startswith('#')]
['this doesnt', 'this shouldnt', 'this isnt', 'this musnt']