Teja wrote: > HI all, > > I need to write a regular experssion for a string which satisfies the > following a criteria : > > 1) it should start with an alphabet > 2) it can contain alphabets/digits/_ from second character > 3) it can contain "[a-z]" or "[0-9]" at the end. but this is optional
Based on the examples you give later, you don't mean "optional" (0 or 1 occurrences), you mean 0 or more occurrences. Assuming "alphabet" means "English alphabetic": r"[a-zA-Z][a-zA-Z0-9_]*(\[[a-z0-9]\])*" HTH, John -- http://mail.python.org/mailman/listinfo/python-list
