Regenerate function body, and grab AST for specific function

[riverratz]

When parsing a C file, I'd like to be able to regenerate the function body for a given function, and get the AST for specifically that function. e.g., example0.c

#include something.h 

void my_example() {
  int data = rand();
  printIntLine(data);
}

int main(int argc, char * argv[]) {
  my_example();
}

I've been attempting to modify func_defs.py. Current code as follows. I need assistance with func_ast and func_body

import pandas as pd

sys.path.extend(['.', '..'])

from pycparser import c_parser, c_ast, parse_file

function_list = []

# A simple visitor for FuncDef nodes that prints the names and
# locations of function definitions.
class FuncDefVisitor(c_ast.NodeVisitor):
    def visit_FuncDef(self, node):
        func_name = str(node.decl.name)
        coord = str(node.decl.coord)

        # if the function name contains the word "example" add it to the list
        if re.search("example", func_name):
            func_ast = the ast for this function   # need help here
            func_body = str(the function body) # need help here
            function_list.append([func_name, coord, function_ast, function_body])
        else: 
            pass


def show_func_defs(filename):
    ast = parse_file(filename,
                    use_cpp=True,
                    cpp_path='clang',
                    cpp_args=['-E', '-I/utils/fake_libc_include'])

    v = FuncDefVisitor()
    v.visit(ast)


if __name__ == "__main__":
    if len(sys.argv) > 1:
        filename  = sys.argv[1]
    else:
        dir = '/Users/me/my_c_examples'
        for filename in glob.iglob(dir + "*/*/*.c", recursive=True):
            try:
                show_func_defs(filename)
            except:
                print("Check  out: ", filename)
                pass

    print(function_list)
    df = pd.DataFrame(function_list, columns=['func_name', 'func_coord', 'func_ast', 'func_body'])
    df.to_csv('my_example_functions_ast.csv')