def __init__(self):
self.dataclose = self.datas[0].close
self.indicators = []
self.strategy_expression_buy = self.params.strategy_expression_buy
self.strategy_expression_sell = self.params.strategy_expression_sell
self.strategies_parameters = self.params.strategies_parameters
for s, p in self.strategies_parameters.items():
if p["name"] == "CCI_buy_Strategy":
self.indicators.append(bt.indicators.CommodityChannelIndex())
elif p["name"] == "CCI_sell_Strategy":
self.indicators.append(bt.indicators.CommodityChannelIndex())
elif p["name"] == "Crossover_SMA_Strategy":
sma_fast, sma_slow = bt.ind.SMA(period=p["parameter"]["fast"]), bt.ind.SMA(period=p["parameter"]["slow"])
self.indicators.append(bt.indicators.CrossOver(sma_fast, sma_slow))
self.strategy_parser = Grammar("""
start: exp ;
@exp : strategy | atomic ;
atomic: '\(' exp op exp '\)' | exp op exp ;
strategy: 's\d+' ;
op: '\&|\|' ;
SPACES: '[ ]+' (%ignore) ;
""")
self.strategy_expression_buy = self.strategy_parser.parse(self.strategy_expression_buy)
self.calc_buy = self.Calc(self.indicators, self.strategies_parameters)
self.strategy_expression_sell = self.strategy_parser.parse(self.strategy_expression_sell)
self.calc_sell = self.Calc(self.indicators, self.strategies_parameters)
import operator as op
from plyplus import Grammar, STransformer
calc_grammar = Grammar("""
start: add;
?add: (add add_symbol)? mul;
?mul: (mul mul_symbol)? atom;
@atom: neg | number | '\(' add '\)';
neg: '-' atom;
number: '[\d.]+';
mul_symbol: '\*' | '/';
add_symbol: '\+' | '-';
WS: '[ \t]+' (%ignore);
""")
class Calc(STransformer):
def _bin_operator(self, exp):
arg1, operator_symbol, arg2 = exp.tail
operator_func = { '+': op.add, '-': op.sub, '*': op.mul, '/': op.div }[operator_symbol]
return operator_func(arg1, arg2)
number = lambda self, exp: float(exp.tail[0])
neg = lambda self, exp: -exp.tail[0]
__default__ = lambda self, exp: exp.tail[0]
add = _bin_operator
mul = _bin_operator
list_parser = Grammar(r"""
start : (command eol)* ;
command : alpha_command | animate_command | color_command | 'display' | define_command | kill_command | spring_command | 'wait';
alpha_command: 'alpha' pattern number;
animate_command: 'animate' geometry;
color_command: 'color' pattern color;
define_command: box_command ;
// box_command : 'define' name 'box' number number (color)? (geometry)? (option)*;
box_command : 'define' name 'box' number number color;
kill_command: 'kill' pattern ;
sleep_command: 'sleep' number;
spring_command: 'spring' pattern (number number number number)? (option)*;
pattern: name (name)* | regexp ;
option: '-' name;
geometry : number number | name (offset)?;
offset : '\+' number '-' number ;
color: simple_color ('\*' number)?;
simple_color: name | '\#[\da-f]{6,8}' | number ',' number ',' number (',' number)? | name '\*' number;
name : '[A-Za-z][0-9A-Za-z]*' ;
number : '[\d\.]+' ;
regexp: 'r\'.+?\'' ;
eol : '\n' ;
SPACES : ' +' (%ignore) ;
""")
#tokens = tokens +' '+token[2].lower()
return tokens
path = 'Programas_MiniJava/programa1.java'
with open(path) as f:
texto_arq = f.readlines()
#print(texto)
texto = ''
for i in texto_arq:
texto = texto + i
texto = retornaTokensArquivo(path)
cont = 1
text = ''
for i in texto:
text = text + i
if i == ' ':
#print(text, cont)
cont += 1
text = ''
#print(texto)
#texto = retornaTokensArquivo(path)
parser = Grammar(open("MiniJava.g"))
resp = parser.parse(texto)
print(resp)
def buildGrammar(self):
return Grammar(self.grammar)
calc_grammar = Grammar("""
@start: assign;
// Rules
?assign: (id eq_symbol)? logic;
?logic: (logic logic_symbol)? add;
?add: (add add_symbol)? mul;
?mul: (mul mul_symbol)? atom;
@atom: neg | number | '\(' add '\)' | boolean | id;
neg: '-' atom;
// Tokens
number: '[\d.]+';
eq_symbol: '<-';
boolean : true | false;
true: TRUE;
false: FALSE;
logic_symbol: '\&' | '\|';
id: ID;
ID: '\w+'
(%unless
TRUE: 'TRUE';
FALSE: 'FALSE';
);
mul_symbol: '\*' | '/';
add_symbol: '\+' | '-';
WS: '[ \t]+' (%ignore);
""")
# calc.py - # A simple calculator without using eval
# A shorter and simpler re-implementation of http://www.dabeaz.com/ply/example.html
import operator as op
from plyplus import Grammar, STransformer
calc_grammar = Grammar(open("calc.g"))
class Calc(STransformer):
def __init__(self):
super()
def _bin_operator(self, exp):
arg1, operator_symbol, arg2 = exp.tail
operator_func = {
'+': op.add,
'-': op.sub,
'%': op.mod,
'*': op.mul,
'/': op.truediv,
'^': op.pow
}[operator_symbol]
print(exp.tail, '=>', operator_func(arg1, arg2))
return operator_func(arg1, arg2)
number = lambda self, exp: float(exp.tail[0])
negate = lambda self, exp: -exp.tail[0]
__default__ = lambda self, exp: exp.tail[0]
from plyplus import Grammar, STransformer
json_grammar = Grammar(r"""
@start: value ;
?value : object | array | string | number | boolean | null ;
string : '".*?(?<!\\)(\\\\)*?"' ;
number : '-?([1-9]\d*|\d)(\.\d+)?([eE][+-]?\d+)?' ;
pair : string ':' value ;
object : '\{' ( pair ( ',' pair )* )? '\}' ;
array : '\[' ( value ( ',' value ) * )? '\]' ;
boolean : 'true' | 'false' ;
null : 'null' ;
WS: '[ \t\n]+' (%ignore) (%newline);
""")
class JSON_Transformer(STransformer):
"""Transforms JSON AST into Python native objects."""
number = lambda self, node: float(node.tail[0])
string = lambda self, node: node.tail[0][1:-1]
boolean = lambda self, node: True if node.tail[0] == 'true' else False
null = lambda self, node: None
array = lambda self, node: node.tail
pair = lambda self, node: {node.tail[0]: node.tail[1]}
def object(self, node):
result = {}
for i in node.tail:
# Eval and bridge to the scripting lang.
import operator as op
import math
# do not mess with following 3 lines.
from plyplus import Grammar
gram_text = open('grmr.g', 'r').read()
grammar = Grammar(gram_text)
class EvalError(BaseException):
pass
class Scope:
def __init__(self, parent, isfunc, kwargs):
self.parent = parent
self.vars = {}
self.isfunc = isfunc
self.vars.update(kwargs)
def __getitem__(self, item):
try:
return self.vars[item]
except:
try:
return self.parent[item]
except:
raise EvalError, "Variable not defined: " + str(item)
# Python 3.x already have lazy map
pass
__all__ = ["parse"]
__version__ = "0.2.0"
grammar = Grammar(r"""
@start : package ;
package : name extras? specs? comment?;
name : string ;
specs : comparison version (',' comparison version)* ;
comparison : '<' | '<=' | '!=' | '==' | '>=' | '>' | '~=' | '===' ;
version : string ;
extras : '\[' (extra (',' extra)*)? '\]' ;
extra : string ;
comment : '\#.+' ;
@string : '[-A-Za-z0-9_\.]+' ;
SPACES: '[ \t\n]+' (%ignore) (%newline);
""")
class Requirement(object):
def __init__(self, name=None, extras=None, specs=None, comment=None):
self.name = name
self.extras = extras
"""Demonstrates the use of the permutation operator."""
from plyplus import Grammar
# Basic Permutations
perm1 = Grammar("""
start : a ^ b? ^ c ;
a : 'a' ;
b : 'b' ;
c : 'c' ;
WS: '[ \t]+' (%ignore);
""")
print perm1.parse(' c b a').pretty()
print perm1.parse('c a ').pretty()
# Permutations with a separator
perm2 = Grammar("""
start : a ^ (b|d)? ^ c ^^ ( COMMA | SEMI ) ;
a : 'a' ;
b : 'b' ;
c : 'c' ;
d : 'd' ;
COMMA : ',' ;
SEMI : ';' ;
WS: '[ \t]+' (%ignore);
""")
user_grammar = Grammar("""
start: logical_or;
?logical_or: logical_or op_or logical_and | logical_and;
?logical_and: logical_and op_and expr | expr;
?expr: un_string_expr | un_expr | bin_expr | '\(' logical_or '\)';
?bin_expr: (bin_string_expr | bin_passwd_expr | bin_pk_expr | bin_date_expr |
bin_bool_expr);
un_string_expr: (string_field | password) pr;
un_expr: (date_field | bool_field) pr;
bin_string_expr: string_field string_op t_string;
bin_passwd_expr: password eq t_string;
bin_pk_expr: pk eq t_string;
bin_date_expr: date_field date_op t_date;
bin_bool_expr: bool_field eq t_bool;
?string_op: eq | co | sw;
?date_op: eq | gt | ge | lt | le;
?op_or: '(?i)or';
?op_and: '(?i)and';
pr: '(?i)pr';
eq: '(?i)eq';
co: '(?i)co';
sw: '(?i)sw';
gt: '(?i)gt';
ge: '(?i)ge';
lt: '(?i)lt';
le: '(?i)le';
?string_field: username | first_name | last_name | email;
?date_field: date_joined;
?bool_field: is_active;
username: '******';
first_name: '(?i)name\.givenName' | '(?i)givenName';
last_name: '(?i)name\.familyName' | '(?i)familyName';
password: '******';
pk: '(?i)id';
date_joined: '(?i)meta\.created' | '(?i)created';
email: '(?i)emails\.value' | '(?i)emails';
is_active: '(?i)active';
t_string: '"(?:[^"\\\\]|\\\\.)*"' ;
t_date: '"\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}[Zz]?"';
t_bool: 'false' | 'true';
SPACES: '[ ]+' (%ignore);
""")
