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pythonparser3
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pythonparser3
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#!/usr/bin/env python3
import sys
import json as json
import ast
import asttokens
from xml.sax.saxutils import quoteattr
import argparse
def read_file_to_string(filename):
f = open(filename, 'rt')
s = f.read()
f.close()
return s
def parse_file(filename):
tree = asttokens.ASTTokens(read_file_to_string(filename), parse=True).tree
json_tree = []
def localize(node, json_node):
json_node['lineno'] = str(node.first_token.start[0])
json_node['col'] = str(node.first_token.start[1])
json_node['end_line_no'] = str(node.last_token.end[0])
json_node['end_col'] = str(node.last_token.end[1])
def gen_identifier(identifier, node_type = 'identifier', node=None):
pos = len(json_tree)
json_node = {}
json_tree.append(json_node)
json_node['type'] = node_type
json_node['value'] = identifier
localize(node, json_node)
return pos
def traverse_list(l, node_type = 'list', node = None):
pos = len(json_tree)
json_node = {}
json_tree.append(json_node)
json_node['type'] = node_type
localize(node, json_node)
children = []
for item in l:
children.append(traverse(item))
if (len(children) != 0):
json_node['children'] = children
return pos
def traverse(node):
pos = len(json_tree)
json_node = {}
json_tree.append(json_node)
json_node['type'] = type(node).__name__
localize(node, json_node)
children = []
if isinstance(node, ast.Name):
json_node['value'] = node.id
elif isinstance(node, ast.NameConstant):
json_node['value'] = node.value
elif isinstance(node, ast.Constant):
json_node['value'] = node.value
elif isinstance(node, ast.Num):
json_node['value'] = (node.n)
elif isinstance(node, ast.Str):
json_node['value'] = node.s
elif isinstance(node, ast.alias):
json_node['value'] = (node.name)
if node.asname:
children.append(gen_identifier(node.asname, node = node))
elif isinstance(node, ast.FunctionDef):
json_node['value'] = (node.name)
elif isinstance(node, ast.ExceptHandler):
if node.name:
json_node['value'] = node.name
elif isinstance(node, ast.ClassDef):
json_node['value'] = (node.name)
elif isinstance(node, ast.ImportFrom):
if node.module:
json_node['value'] = (node.module)
elif isinstance(node, ast.Global):
for n in node.names:
children.append(gen_identifier(n, node = node))
elif isinstance(node, ast.keyword):
json_node['value'] = (node.arg)
elif isinstance(node, ast.arg):
json_node['value'] = (node.arg)
# Process children.
if isinstance(node, ast.For):
children.append(traverse(node.target))
children.append(traverse(node.iter))
children.append(traverse_list(node.body, 'body', node))
if node.orelse:
children.append(traverse_list(node.orelse, 'orelse', node))
elif isinstance(node, ast.If) or isinstance(node, ast.While):
children.append(traverse(node.test))
children.append(traverse_list(node.body, 'body', node))
if node.orelse:
children.append(traverse_list(node.orelse, 'orelse', node))
elif isinstance(node, ast.With):
children.append(traverse_list(node.items, 'items', node))
children.append(traverse_list(node.body, 'body', node))
elif isinstance(node, ast.withitem):
children.append(traverse(node.context_expr))
if node.optional_vars:
children.append(traverse(node.optional_vars))
elif isinstance(node, ast.Try):
children.append(traverse_list(node.body, 'body', node))
children.append(traverse_list(node.handlers, 'handlers', node))
if node.orelse:
children.append(traverse_list(node.orelse, 'orelse', node))
if node.finalbody:
children.append(traverse_list(node.finalbody, 'finalbody', node))
elif isinstance(node, ast.arguments):
children.append(traverse_list(node.args, 'args', node))
children.append(traverse_list(node.defaults, 'defaults', node))
children.append(traverse_list(node.kwonlyargs, 'defaults', node))
children.append(traverse_list(node.kw_defaults, 'defaults', node))
if node.vararg:
children.append(gen_identifier(node.vararg.arg, 'vararg', node.vararg))
if node.kwarg:
children.append(gen_identifier(node.kwarg.arg, 'kwarg', node.kwarg))
elif isinstance(node, ast.ExceptHandler):
if node.type:
children.append(traverse_list([node.type], 'type', node))
children.append(traverse_list(node.body, 'body', node))
elif isinstance(node, ast.ClassDef):
children.append(traverse_list(node.bases, 'bases', node))
children.append(traverse_list(node.body, 'body', node))
children.append(traverse_list(node.decorator_list, 'decorator_list', node))
elif isinstance(node, ast.FunctionDef):
children.append(traverse(node.args))
children.append(traverse_list(node.body, 'body', node))
children.append(traverse_list(node.decorator_list, 'decorator_list', node))
else:
# Default handling: iterate over children.
for child in ast.iter_child_nodes(node):
if isinstance(child, ast.expr_context) or isinstance(child, ast.operator) or isinstance(child, ast.boolop) or isinstance(child, ast.unaryop) or isinstance(child, ast.cmpop):
# Directly include expr_context, and operators into the type instead of creating a child.
json_node['type'] = json_node['type'] + type(child).__name__
else:
children.append(traverse(child))
if isinstance(node, ast.Attribute):
children.append(gen_identifier(node.attr, 'attr', node))
if (len(children) != 0):
json_node['children'] = children
return pos
traverse(tree)
return json_tree
def json2xml(tree):
lines = []
def convert_node(i, indent_level=0):
node = tree[i]
line = "\t" * indent_level + "<{}".format(node['type'])
for key in ['value', 'lineno', 'col', 'end_line_no', 'end_col']:
if key in node:
line += (' {}={}'.format(key, quoteattr(str(node[key]))))
line += ">"
lines.append(line)
if "children" in node:
for child in node["children"]:
convert_node(int(child), indent_level + 1)
lines.append("\t" * indent_level + "</" + node["type"] + ">")
return lines
return "\n".join(convert_node(0))
if __name__ == "__main__":
parser = argparse.ArgumentParser(description='Parse python3 file')
parser.add_argument('filename', type=str, help='Filename')
parser.add_argument('-f', '--format', choices=["xml", "json"], help="Print format", default="xml")
args = parser.parse_args()
json_tree = parse_file(args.filename)
if args.format == "json":
print(json.dumps(json_tree, separators=(',', ':'), ensure_ascii=False))
else:
xml = json2xml(json_tree)
print(xml)