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Dir : ~/usr/share/doc/python3-pycparser/examples/

View File Name : serialize_ast.py

#-----------------------------------------------------------------
# pycparser: serialize_ast.py
#
# Simple example of serializing AST
#
# Hart Chu [https://github.com/CtheSky]
# Eli Bendersky [https://eli.thegreenplace.net/]
# License: BSD
#-----------------------------------------------------------------
from __future__ import print_function
import pickle

from pycparser import c_parser

text = r"""
void func(void)
{
  x = 1;
}
"""

parser = c_parser.CParser()
ast = parser.parse(text)

# Since AST nodes use __slots__ for faster attribute access and
# space saving, it needs Pickle's protocol version >= 2.
# The default version is 3 for python 3.x and 1 for python 2.7.
# You can always select the highest available protocol with the -1 argument.

with open('ast', 'wb') as f:
    pickle.dump(ast, f, protocol=-1)

# Deserialize.
with open('ast', 'rb') as f:
    ast = pickle.load(f)
    ast.show()