homework of the course complier-principles,buct

basics.py generate nfa,dfa,and minimized dfa according to a regular expression

myll1.py：ll1 analysis, generate ll1 parsing table and perform a parse on input string

mylr0.py：lr0 analysis, generate lr0 parsing table and perform a parse on input string

slr1.py：slr1 analysis, generate slr1 parsing table and perform a parse on input string