human
I am working on the file "ANTLR4-Python/SLR-Parser-Generator/SLR-Table-Generator.ipynb".
The first task is:
SLR-Table-Generation
The class Grammar represents a context free grammar.  It stores a list of the GrammarRules of the given grammar.
Each grammar rule is of the form
$$ a \rightarrow \beta $$
where $\beta$ is a tuple of variables, tokens, and literals.
The start symbol is assumed to be the variable on the left hand side of the first rule. The grammar is augmented with the rule
$$ \widehat{s} \rightarrow s\, \$. $$
Here $s$ is the start variable of the given grammar and $\widehat{s}$ is a new variable that is the start variable of the augmented grammar. The symbol $ denotes the end of input.  The non-obvious member variables of the class Grammar have the following interpretation
- mStates is the set of all states of the SLR-parser.  These states are sets of marked rules.
- mStateNamesis a dictionary assigning names of the form s0, s1, $\cdots$, sn to the states stored in 
  mStates.  The functions action and goto will be defined for state names, not for states, because 
  otherwise the table representing these functions would become both huge and unreadable.
- mConflicts is a Boolean variable that will be set to true if the table generation discovers 
  shift/reduce conflicts or reduce/reduce conflicts.
Can you write Python program for it?
 Can you provide a the Python program you requested?
assistant
#Here is the Python program you requested.

class Grammar():
    def __init__(self, Rules):
        self.mRules      = Rules
        self.mStart      = Rules[0].mVariable
        self.mVariables  = collect_variables(Rules)
        self.mTokens     = collect_tokens(Rules)
        self.mStates     = set()
        self.mStateNames = {}
        self.mConflicts  = False
        self.mVariables.add('ŝ')
        self.mTokens.add('$')
        self.mRules.append(GrammarRule('ŝ', (self.mStart, '$'))) # augmenting
        self.compute_tables()