BNF

DELETE THIS --expr =  | NUMBER | string | 'None' | 'True' | 'False'

stuff ::=
             stmt NEWLINE
              | NEWLINE INDENT statement+ DEDENT

statement ::=
             stmt NEWLINE

stmt ::= if_stmt | for_stmt | print_stmt | assignment_stmt

import_stmt ::= "import" module ["as" module_name] | "from" module "import" module ["as" module_name]

module ::= identifier

module_name ::= identifier

expression ::= comparison
if_stmt ::=
             "if" expression ":" stuff
                ( "elif" expression ":" stuff )*
                ["else" ":" stuff]

for_stmt ::=
             "for" target_list "in" expression_list
              ":" stuff
                ["else" ":" stuff]

print_stmt ::= "print(" string ")"

comp_op ::= "in"|"not" "in"|"is"|"is" "not"|"<"|">"|"=="|">="|"<="|"!="

comparison ::= expr (comp_op expr)*

varname ::= identifier

funcname ::=
             identifier

classdef ::=
             "class" classname ":"
              stuff

classname ::=
             identifier

funcdef ::=
              "def" funcname "(" [parameter_list] ")"
              ":" stuff


parameter_list ::=
                 (parameter ",")*

parameter ::=
             identifier


assignment_stmt ::= identifier "=" (identifier | number | string)

identifier ::=
             (letter|"_") (letter | digit | "_")*

string ::= "'" alphanumeric "'" | '"' alphanumeric '"'

alphanumeric ::= (letter | digit)+

letter ::=
             lowercase | uppercase


lowercase ::=
             "a" | "b" | "c" | "d" | "e" | "f" | "g" | "h" | "i" | "j" | "k" | "l" | "m" | "n" | "o" | "p" | "q" | "r" | "s" | "t" | "u" | "v" | "w" | "x" | "y" | "z"

uppercase ::=
             "A" | "B" | "C" | "D" | "E" | "F" | "G" | "H" | "I" | "J" | "K" | "L" | "M" | "N" | "O" | "P" | "Q" | "R" | "S" | "T" | "U" | "V" | "W" | "X" | "Y" | "Z"

digit ::=
             "0" | "1" | "2" | "3" | "4" | "5" | "6" | "7" | "8" | "9"