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September 7, 2022 16:41
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Convert python contains single class to java with errors must be fixed by you
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from __future__ import print_function, unicode_literals | |
import ast | |
import os | |
import sys | |
import tokenize | |
import six | |
from six import StringIO | |
# Large float and imaginary literals get turned into infinities in the AST. | |
# We unparse those infinities to INFSTR. | |
from src.utils.str_utils import camel_case | |
INFSTR = "1e" + repr(sys.float_info.max_10_exp + 1) | |
def interleave(inter, f, seq): | |
"""Call f on each item in seq, calling inter() in between. | |
""" | |
seq = iter(seq) | |
try: | |
f(next(seq)) | |
except StopIteration: | |
pass | |
else: | |
for x in seq: | |
inter() | |
f(x) | |
class JavaUnparser: | |
"""Methods in this class recursively traverse an AST and | |
output source code for the abstract syntax; original formatting | |
is disregarded. """ | |
def __init__(self, tree, file=sys.stdout): | |
"""Unparser(tree, file=sys.stdout) -> None. | |
Print the source for tree to file.""" | |
self.f = file | |
self.future_imports = [] | |
self._indent = 0 | |
self.dispatch(tree) | |
print("", file=self.f) | |
self.f.flush() | |
def fill(self, text=""): | |
"Indent a piece of text, according to the current indentation level" | |
self.f.write("\n" + " " * self._indent + text) | |
def write(self, text): | |
"Append a piece of text to the current line." | |
self.f.write(six.text_type(text)) | |
def enter(self): | |
"Print ':', and increase the indentation." | |
self.write(" {") | |
self._indent += 1 | |
def leave(self): | |
"Decrease the indentation level." | |
self._indent -= 1 | |
self.fill("}") | |
def dispatch(self, tree): | |
"Dispatcher function, dispatching tree type T to method _T." | |
if isinstance(tree, list): | |
for t in tree: | |
self.dispatch(t) | |
return | |
meth = getattr(self, "_" + tree.__class__.__name__) | |
meth(tree) | |
############### Unparsing methods ###################### | |
# There should be one method per concrete grammar type # | |
# Constructors should be grouped by sum type. Ideally, # | |
# this would follow the order in the grammar, but # | |
# currently doesn't. # | |
######################################################## | |
def _Module(self, tree): | |
for stmt in tree.body: | |
self.dispatch(stmt) | |
def _Interactive(self, tree): | |
for stmt in tree.body: | |
self.dispatch(stmt) | |
def _Expression(self, tree): | |
self.dispatch(tree.body) | |
# stmt | |
def _Expr(self, tree): | |
self.fill() | |
self.dispatch(tree.value) | |
self.write(";") | |
def _NamedExpr(self, tree): | |
self.write("(") | |
self.dispatch(tree.target) | |
self.write(" := ") | |
self.dispatch(tree.value) | |
self.write(")") | |
def _Import(self, t): | |
self.fill("import ") | |
interleave(lambda: self.write(", "), self.dispatch, t.names) | |
def _ImportFrom(self, t): | |
# A from __future__ import may affect unparsing, so record it. | |
if t.module and t.module == '__future__': | |
self.future_imports.extend(n.name for n in t.names) | |
self.fill("from ") | |
self.write("." * t.level) | |
if t.module: | |
self.write(t.module) | |
self.write(" import ") | |
interleave(lambda: self.write(", "), self.dispatch, t.names) | |
def _Assign(self, t): | |
self.fill() | |
for target in t.targets: | |
self.dispatch(target) | |
self.write(" = ") | |
self.dispatch(t.value) | |
self.write(";") | |
def _AugAssign(self, t): | |
self.fill() | |
self.dispatch(t.target) | |
self.write(" " + self.binop[t.op.__class__.__name__] + "= ") | |
self.dispatch(t.value) | |
self.write(";") | |
def _AnnAssign(self, t): | |
self.fill() | |
if not t.simple and isinstance(t.target, ast.Name): | |
self.write('(') | |
self.dispatch(t.target) | |
if not t.simple and isinstance(t.target, ast.Name): | |
self.write(')') | |
self.write(": ") | |
self.dispatch(t.annotation) | |
if t.value: | |
self.write(" = ") | |
self.dispatch(t.value) | |
def _Return(self, t): | |
self.fill("return") | |
if t.value: | |
self.write(" ") | |
self.dispatch(t.value) | |
self.write(";") | |
def _Pass(self, t): | |
self.fill("") | |
def _Break(self, t): | |
self.fill("break;") | |
def _Continue(self, t): | |
self.fill("continue;") | |
def _Delete(self, t): | |
self.fill("del ") | |
interleave(lambda: self.write(", "), self.dispatch, t.targets) | |
def _Assert(self, t): | |
self.fill("assert ") | |
self.dispatch(t.test) | |
if t.msg: | |
self.write(", ") | |
self.dispatch(t.msg) | |
def _Exec(self, t): | |
self.fill("exec ") | |
self.dispatch(t.body) | |
if t.globals: | |
self.write(" in ") | |
self.dispatch(t.globals) | |
if t.locals: | |
self.write(", ") | |
self.dispatch(t.locals) | |
def _Print(self, t): | |
self.fill("print ") | |
do_comma = False | |
if t.dest: | |
self.write(">>") | |
self.dispatch(t.dest) | |
do_comma = True | |
for e in t.values: | |
if do_comma: | |
self.write(", ") | |
else: | |
do_comma = True | |
self.dispatch(e) | |
if not t.nl: | |
self.write(",") | |
def _Global(self, t): | |
self.fill("global ") | |
interleave(lambda: self.write(", "), self.write, t.names) | |
def _Nonlocal(self, t): | |
self.fill("nonlocal ") | |
interleave(lambda: self.write(", "), self.write, t.names) | |
def _Await(self, t): | |
self.write("(") | |
self.write("await") | |
if t.value: | |
self.write(" ") | |
self.dispatch(t.value) | |
self.write(")") | |
def _Yield(self, t): | |
self.write("(") | |
self.write("yield") | |
if t.value: | |
self.write(" ") | |
self.dispatch(t.value) | |
self.write(")") | |
def _YieldFrom(self, t): | |
self.write("(") | |
self.write("yield from") | |
if t.value: | |
self.write(" ") | |
self.dispatch(t.value) | |
self.write(")") | |
def _Raise(self, t): | |
self.fill("throw") | |
if six.PY3: | |
if not t.exc: | |
assert not t.cause | |
return | |
self.write(" ") | |
self.dispatch(t.exc) | |
if t.cause: | |
self.write(" from ") | |
self.dispatch(t.cause) | |
else: | |
self.write(" ") | |
if t.type: | |
self.dispatch(t.type) | |
if t.inst: | |
self.write(", ") | |
self.dispatch(t.inst) | |
if t.tback: | |
self.write(", ") | |
self.dispatch(t.tback) | |
self.write(";") | |
def _Try(self, t): | |
self.fill("try") | |
self.enter() | |
self.dispatch(t.body) | |
self.leave() | |
for ex in t.handlers: | |
self.dispatch(ex) | |
if t.orelse: | |
self.fill("else") | |
self.enter() | |
self.dispatch(t.orelse) | |
self.leave() | |
if t.finalbody: | |
self.fill("finally") | |
self.enter() | |
self.dispatch(t.finalbody) | |
self.leave() | |
def _TryExcept(self, t): | |
self.fill("try") | |
self.enter() | |
self.dispatch(t.body) | |
self.leave() | |
for ex in t.handlers: | |
self.dispatch(ex) | |
if t.orelse: | |
self.fill("else") | |
self.enter() | |
self.dispatch(t.orelse) | |
self.leave() | |
def _TryFinally(self, t): | |
if len(t.body) == 1 and isinstance(t.body[0], ast.TryExcept): | |
# try-except-finally | |
self.dispatch(t.body) | |
else: | |
self.fill("try") | |
self.enter() | |
self.dispatch(t.body) | |
self.leave() | |
self.fill("finally") | |
self.enter() | |
self.dispatch(t.finalbody) | |
self.leave() | |
def _ExceptHandler(self, t): | |
self.fill("except") | |
if t.type: | |
self.write(" ") | |
self.dispatch(t.type) | |
if t.name: | |
self.write(" as ") | |
if six.PY3: | |
self.write(t.name) | |
else: | |
self.dispatch(t.name) | |
self.enter() | |
self.dispatch(t.body) | |
self.leave() | |
def _ClassDef(self, t): | |
self.write("\n") | |
for deco in t.decorator_list: | |
self.fill("@") | |
self.dispatch(deco) | |
self.fill("class " + t.name) | |
if six.PY3: | |
self.write("(") | |
comma = False | |
for e in t.bases: | |
if comma: | |
self.write(", ") | |
else: | |
comma = True | |
self.dispatch(e) | |
for e in t.keywords: | |
if comma: | |
self.write(", ") | |
else: | |
comma = True | |
self.dispatch(e) | |
if sys.version_info[:2] < (3, 5): | |
if t.starargs: | |
if comma: | |
self.write(", ") | |
else: | |
comma = True | |
self.write("*") | |
self.dispatch(t.starargs) | |
if t.kwargs: | |
if comma: | |
self.write(", ") | |
else: | |
comma = True | |
self.write("**") | |
self.dispatch(t.kwargs) | |
self.write(")") | |
elif t.bases: | |
self.write("(") | |
for a in t.bases: | |
self.dispatch(a) | |
self.write(", ") | |
self.write(")") | |
self.enter() | |
self.dispatch(t.body) | |
self.leave() | |
def _FunctionDef(self, t): | |
self.__FunctionDef_helper(t, "public Object") | |
def _AsyncFunctionDef(self, t): | |
self.__FunctionDef_helper(t, "async def") | |
def __FunctionDef_helper(self, t, fill_suffix): | |
self.write("\n") | |
for deco in t.decorator_list: | |
self.fill("@") | |
self.dispatch(deco) | |
def_str = fill_suffix + " " + t.name + "(" | |
self.fill(def_str) | |
self.dispatch(t.args) | |
self.write(")") | |
if getattr(t, "returns", False): | |
self.write(" -> ") | |
self.dispatch(t.returns) | |
self.enter() | |
self.dispatch(t.body) | |
self.leave() | |
def _For(self, t): | |
self.__For_helper("for ", t) | |
def _AsyncFor(self, t): | |
self.__For_helper("async for ", t) | |
def __For_helper(self, fill, t): | |
self.fill(fill) | |
self.write("(Object ") | |
self.dispatch(t.target) | |
self.write(" : ") | |
self.dispatch(t.iter) | |
self.write(")") | |
self.enter() | |
self.dispatch(t.body) | |
self.leave() | |
if t.orelse: | |
self.fill("else") | |
self.enter() | |
self.dispatch(t.orelse) | |
self.leave() | |
def _If(self, t): | |
self.fill("if (") | |
self.dispatch(t.test) | |
self.write(")") | |
self.enter() | |
self.dispatch(t.body) | |
self.leave() | |
# collapse nested ifs into equivalent elifs. | |
while (t.orelse and len(t.orelse) == 1 and | |
isinstance(t.orelse[0], ast.If)): | |
t = t.orelse[0] | |
self.write(" else if ") | |
self.dispatch(t.test) | |
self.enter() | |
self.dispatch(t.body) | |
self.leave() | |
# final else | |
if t.orelse: | |
self.write(" else") | |
self.enter() | |
self.dispatch(t.orelse) | |
self.leave() | |
def _While(self, t): | |
self.fill("while ") | |
self.dispatch(t.test) | |
self.enter() | |
self.dispatch(t.body) | |
self.leave() | |
if t.orelse: | |
self.fill("else") | |
self.enter() | |
self.dispatch(t.orelse) | |
self.leave() | |
def _generic_With(self, t, async_=False): | |
self.fill("try") | |
self.write("(") | |
if hasattr(t, 'items'): | |
interleave(lambda: self.write(", "), self.dispatch, t.items) | |
else: | |
if t.optional_vars: | |
self.dispatch(t.optional_vars) | |
self.write(" = ") | |
self.dispatch(t.context_expr) | |
self.write(")") | |
self.enter() | |
self.dispatch(t.body) | |
self.leave() | |
def _With(self, t): | |
self._generic_With(t) | |
def _AsyncWith(self, t): | |
self._generic_With(t, async_=True) | |
# expr | |
def _Bytes(self, t): | |
self.write(repr(t.s)) | |
def _Str(self, tree): | |
if six.PY3: | |
self.write(repr(tree.s)) | |
else: | |
# if from __future__ import unicode_literals is in effect, | |
# then we want to output string literals using a 'b' prefix | |
# and unicode literals with no prefix. | |
if "unicode_literals" not in self.future_imports: | |
self.write(repr(tree.s)) | |
elif isinstance(tree.s, str): | |
self.write("b" + repr(tree.s)) | |
elif isinstance(tree.s, unicode): | |
self.write(repr(tree.s).lstrip("u")) | |
else: | |
assert False, "shouldn't get here" | |
def _JoinedStr(self, t): | |
# JoinedStr(expr* values) | |
self.write("f") | |
string = StringIO() | |
self._fstring_JoinedStr(t, string.write) | |
# Deviation from `unparse.py`: Try to find an unused quote. | |
# This change is made to handle _very_ complex f-strings. | |
v = string.getvalue() | |
if '\n' in v or '\r' in v: | |
quote_types = ["'''", '"""'] | |
else: | |
quote_types = ["'", '"', '"""', "'''"] | |
for quote_type in quote_types: | |
if quote_type not in v: | |
v = "{quote_type}{v}{quote_type}".format(quote_type=quote_type, v=v) | |
break | |
else: | |
v = repr(v) | |
self.write(v) | |
def _FormattedValue(self, t): | |
# FormattedValue(expr value, int? conversion, expr? format_spec) | |
self.write("f") | |
string = StringIO() | |
self._fstring_JoinedStr(t, string.write) | |
self.write(repr(string.getvalue())) | |
def _fstring_JoinedStr(self, t, write): | |
for value in t.values: | |
meth = getattr(self, "_fstring_" + type(value).__name__) | |
meth(value, write) | |
def _fstring_Str(self, t, write): | |
value = t.s.replace("{", "{{").replace("}", "}}") | |
write(value) | |
def _fstring_Constant(self, t, write): | |
assert isinstance(t.value, str) | |
value = t.value.replace("{", "{{").replace("}", "}}") | |
write(value) | |
def _fstring_FormattedValue(self, t, write): | |
write("{") | |
expr = StringIO() | |
Unparser(t.value, expr) | |
expr = expr.getvalue().rstrip("\n") | |
if expr.startswith("{"): | |
write(" ") # Separate pair of opening brackets as "{ {" | |
write(expr) | |
if t.conversion != -1: | |
conversion = chr(t.conversion) | |
assert conversion in "sra" | |
write("!{conversion}".format(conversion=conversion)) | |
if t.format_spec: | |
write(":") | |
meth = getattr(self, "_fstring_" + type(t.format_spec).__name__) | |
meth(t.format_spec, write) | |
write("}") | |
def _Name(self, t): | |
name_id = t.id | |
if name_id == "self": | |
name_id = "this" | |
self.write(camel_case(name_id)) | |
def _NameConstant(self, t): | |
n_c = repr(t.value) | |
self.write(camel_case(n_c, False)) | |
def _Repr(self, t): | |
self.write("`") | |
self.dispatch(t.value) | |
self.write("`") | |
def _write_constant(self, value): | |
if isinstance(value, (float, complex)): | |
# Substitute overflowing decimal literal for AST infinities. | |
self.write(repr(value).replace("inf", INFSTR)) | |
else: | |
self.write(repr(value)) | |
def _Constant(self, t): | |
value = t.value | |
if isinstance(value, tuple): | |
self.write("(") | |
if len(value) == 1: | |
self._write_constant(value[0]) | |
self.write(",") | |
else: | |
interleave(lambda: self.write(", "), self._write_constant, value) | |
self.write(")") | |
elif value is Ellipsis: # instead of `...` for Py2 compatibility | |
self.write("...") | |
else: | |
if t.kind == "u": | |
self.write("u") | |
self._write_constant(t.value) | |
def _Num(self, t): | |
repr_n = repr(t.n) | |
if six.PY3: | |
self.write(repr_n.replace("inf", INFSTR)) | |
else: | |
# Parenthesize negative numbers, to avoid turning (-1)**2 into -1**2. | |
if repr_n.startswith("-"): | |
self.write("(") | |
if "inf" in repr_n and repr_n.endswith("*j"): | |
repr_n = repr_n.replace("*j", "j") | |
# Substitute overflowing decimal literal for AST infinities. | |
self.write(repr_n.replace("inf", INFSTR)) | |
if repr_n.startswith("-"): | |
self.write(")") | |
def _List(self, t): | |
self.write("Arrays.asList(") | |
interleave(lambda: self.write(", "), self.dispatch, t.elts) | |
self.write(")") | |
def _ListComp(self, t): | |
self.write("Arrays.asList(") | |
self.dispatch(t.elt) | |
for gen in t.generators: | |
self.dispatch(gen) | |
self.write(")") | |
def _GeneratorExp(self, t): | |
self.write("(") | |
self.dispatch(t.elt) | |
for gen in t.generators: | |
self.dispatch(gen) | |
self.write(")") | |
def _SetComp(self, t): | |
self.write("{") | |
self.dispatch(t.elt) | |
for gen in t.generators: | |
self.dispatch(gen) | |
self.write("}") | |
def _DictComp(self, t): | |
self.write("{") | |
self.dispatch(t.key) | |
self.write(": ") | |
self.dispatch(t.value) | |
for gen in t.generators: | |
self.dispatch(gen) | |
self.write("}") | |
def _comprehension(self, t): | |
if getattr(t, 'is_async', False): | |
self.write(" async for ") | |
else: | |
self.write(" for ") | |
self.dispatch(t.target) | |
self.write(" in ") | |
self.dispatch(t.iter) | |
for if_clause in t.ifs: | |
self.write(" if ") | |
self.dispatch(if_clause) | |
def _IfExp(self, t): | |
self.write("(") | |
self.dispatch(t.body) | |
self.write(" if ") | |
self.dispatch(t.test) | |
self.write(" else ") | |
self.dispatch(t.orelse) | |
self.write(")") | |
def _Set(self, t): | |
assert (t.elts) # should be at least one element | |
self.write("{") | |
interleave(lambda: self.write(", "), self.dispatch, t.elts) | |
self.write("}") | |
def _Dict(self, t): | |
self.write("{") | |
def write_key_value_pair(k, v): | |
self.dispatch(k) | |
self.write(": ") | |
self.dispatch(v) | |
def write_item(item): | |
k, v = item | |
if k is None: | |
# for dictionary unpacking operator in dicts {**{'y': 2}} | |
# see PEP 448 for details | |
self.write("**") | |
self.dispatch(v) | |
else: | |
write_key_value_pair(k, v) | |
interleave(lambda: self.write(", "), write_item, zip(t.keys, t.values)) | |
self.write("}") | |
def _Tuple(self, t): | |
self.write("(") | |
if len(t.elts) == 1: | |
elt = t.elts[0] | |
self.dispatch(elt) | |
self.write(",") | |
else: | |
interleave(lambda: self.write(", "), self.dispatch, t.elts) | |
self.write(")") | |
unop = {"Invert": "~", "Not": "not", "UAdd": "+", "USub": "-"} | |
def _UnaryOp(self, t): | |
self.write("(") | |
self.write(self.unop[t.op.__class__.__name__]) | |
self.write(" ") | |
if six.PY2 and isinstance(t.op, ast.USub) and isinstance(t.operand, ast.Num): | |
# If we're applying unary minus to a number, parenthesize the number. | |
# This is necessary: -2147483648 is different from -(2147483648) on | |
# a 32-bit machine (the first is an int, the second a long), and | |
# -7j is different from -(7j). (The first has real part 0.0, the second | |
# has real part -0.0.) | |
self.write("(") | |
self.dispatch(t.operand) | |
self.write(")") | |
else: | |
self.dispatch(t.operand) | |
self.write(")") | |
binop = {"Add": "+", "Sub": "-", "Mult": "*", "MatMult": "@", "Div": "/", "Mod": "%", | |
"LShift": "<<", "RShift": ">>", "BitOr": "|", "BitXor": "^", "BitAnd": "&", | |
"FloorDiv": "//", "Pow": "**"} | |
def _BinOp(self, t): | |
self.write("(") | |
self.dispatch(t.left) | |
self.write(" " + self.binop[t.op.__class__.__name__] + " ") | |
self.dispatch(t.right) | |
self.write(")") | |
cmpops = {"Eq": "==", "NotEq": "!=", "Lt": "<", "LtE": "<=", "Gt": ">", "GtE": ">=", | |
"Is": "is", "IsNot": "is not", "In": "in", "NotIn": "not in"} | |
def _Compare(self, t): | |
self.write("(") | |
self.dispatch(t.left) | |
for o, e in zip(t.ops, t.comparators): | |
self.write(" " + self.cmpops[o.__class__.__name__] + " ") | |
self.dispatch(e) | |
self.write(")") | |
boolops = {ast.And: '&&', ast.Or: '||'} | |
def _BoolOp(self, t): | |
self.write("(") | |
s = " %s " % self.boolops[t.op.__class__] | |
interleave(lambda: self.write(s), self.dispatch, t.values) | |
self.write(")") | |
def _Attribute(self, t): | |
self.dispatch(t.value) | |
# Special case: 3.__abs__() is a syntax error, so if t.value | |
# is an integer literal then we need to either parenthesize | |
# it or add an extra space to get 3 .__abs__(). | |
if isinstance(t.value, getattr(ast, 'Constant', getattr(ast, 'Num', None))) and isinstance(t.value.n, int): | |
self.write(" ") | |
self.write(".") | |
self.write(camel_case(t.attr)) | |
def _Call(self, t): | |
self.dispatch(t.func) | |
self.write("(") | |
comma = False | |
for e in t.args: | |
if comma: | |
self.write(", ") | |
else: | |
comma = True | |
self.dispatch(e) | |
for e in t.keywords: | |
if comma: | |
self.write(", ") | |
else: | |
comma = True | |
self.dispatch(e) | |
if sys.version_info[:2] < (3, 5): | |
if t.starargs: | |
if comma: | |
self.write(", ") | |
else: | |
comma = True | |
self.write("*") | |
self.dispatch(t.starargs) | |
if t.kwargs: | |
if comma: | |
self.write(", ") | |
else: | |
comma = True | |
self.write("**") | |
self.dispatch(t.kwargs) | |
self.write(")") | |
def _Subscript(self, t): | |
self.dispatch(t.value) | |
self.write("[") | |
self.dispatch(t.slice) | |
self.write("]") | |
def _Starred(self, t): | |
self.write("*") | |
self.dispatch(t.value) | |
# slice | |
def _Ellipsis(self, t): | |
self.write("...") | |
def _Index(self, t): | |
self.dispatch(t.value) | |
def _Slice(self, t): | |
if t.lower: | |
self.dispatch(t.lower) | |
self.write(":") | |
if t.upper: | |
self.dispatch(t.upper) | |
if t.step: | |
self.write(":") | |
self.dispatch(t.step) | |
def _ExtSlice(self, t): | |
interleave(lambda: self.write(', '), self.dispatch, t.dims) | |
# argument | |
def _arg(self, t): | |
self.write(t.arg) | |
if t.annotation: | |
self.write(": ") | |
self.dispatch(t.annotation) | |
# others | |
def _arguments(self, t): | |
first = True | |
# normal arguments | |
all_args = getattr(t, 'posonlyargs', []) + t.args | |
defaults = [None] * (len(all_args) - len(t.defaults)) + t.defaults | |
for index, elements in enumerate(zip(all_args, defaults), 1): | |
a, d = elements | |
if first: | |
first = False | |
else: | |
self.write(", ") | |
self.dispatch(a) | |
if d: | |
self.write("=") | |
self.dispatch(d) | |
if index == len(getattr(t, 'posonlyargs', ())): | |
self.write(", /") | |
# varargs, or bare '*' if no varargs but keyword-only arguments present | |
if t.vararg or getattr(t, "kwonlyargs", False): | |
if first: | |
first = False | |
else: | |
self.write(", ") | |
self.write("*") | |
if t.vararg: | |
if hasattr(t.vararg, 'arg'): | |
self.write(t.vararg.arg) | |
if t.vararg.annotation: | |
self.write(": ") | |
self.dispatch(t.vararg.annotation) | |
else: | |
self.write(t.vararg) | |
if getattr(t, 'varargannotation', None): | |
self.write(": ") | |
self.dispatch(t.varargannotation) | |
# keyword-only arguments | |
if getattr(t, "kwonlyargs", False): | |
for a, d in zip(t.kwonlyargs, t.kw_defaults): | |
if first: | |
first = False | |
else: | |
self.write(", ") | |
self.dispatch(a), | |
if d: | |
self.write("=") | |
self.dispatch(d) | |
# kwargs | |
if t.kwarg: | |
if first: | |
first = False | |
else: | |
self.write(", ") | |
if hasattr(t.kwarg, 'arg'): | |
self.write("**" + t.kwarg.arg) | |
if t.kwarg.annotation: | |
self.write(": ") | |
self.dispatch(t.kwarg.annotation) | |
else: | |
self.write("**" + t.kwarg) | |
if getattr(t, 'kwargannotation', None): | |
self.write(": ") | |
self.dispatch(t.kwargannotation) | |
def _keyword(self, t): | |
if t.arg is None: | |
# starting from Python 3.5 this denotes a kwargs part of the invocation | |
self.write("**") | |
else: | |
self.write(t.arg) | |
self.write("=") | |
self.dispatch(t.value) | |
def _Lambda(self, t): | |
self.write("(") | |
self.write("lambda ") | |
self.dispatch(t.args) | |
self.write(": ") | |
self.dispatch(t.body) | |
self.write(")") | |
def _alias(self, t): | |
self.write(t.name) | |
if t.asname: | |
self.write(" as " + t.asname) | |
def _withitem(self, t): | |
if t.optional_vars: | |
self.dispatch(t.optional_vars) | |
self.write(" = ") | |
self.dispatch(t.context_expr) | |
def roundtrip(filename, output=sys.stdout): | |
if six.PY3: | |
with open(filename, "rb") as pyfile: | |
encoding = tokenize.detect_encoding(pyfile.readline)[0] | |
with open(filename, "r", encoding=encoding) as pyfile: | |
source = pyfile.read() | |
else: | |
with open(filename, "r") as pyfile: | |
source = pyfile.read() | |
tree = compile(source, filename, "exec", ast.PyCF_ONLY_AST, dont_inherit=True) | |
Unparser(tree, output) | |
def testdir(a): | |
try: | |
names = [n for n in os.listdir(a) if n.endswith('.py')] | |
except OSError: | |
print("Directory not readable: %s" % a, file=sys.stderr) | |
else: | |
for n in names: | |
fullname = os.path.join(a, n) | |
if os.path.isfile(fullname): | |
output = StringIO() | |
print('Testing %s' % fullname) | |
try: | |
roundtrip(fullname, output) | |
except Exception as e: | |
print(' Failed to compile, exception is %s' % repr(e)) | |
elif os.path.isdir(fullname): | |
testdir(fullname) | |
from six.moves import cStringIO | |
def unparse(tree): | |
v = cStringIO() | |
JavaUnparser(tree, file=v) | |
return v.getvalue() | |
if __name__ == '__main__': | |
with open('file.py', 'r') as pt: | |
tree = ast.parse(pt.read()) | |
v = cStringIO() | |
JavaUnparser(tree, file=v) | |
print(v.getvalue()) |
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