help with regex pattern for @123.ynynyn

please help with this regex pattern @123.ynynyn

The pattern starts with a symbol @, just 1 character long

follow by numbers only, at least 1 character

follow by a period (.), just 1 character long

follow by开发者_Python百科 a 6 character long letter string of only y or n

TIA

How about:

@\d+\.[yn]{6}        

Hope that helps.