Commit c81684b2 authored by Martin Bauer's avatar Martin Bauer
Browse files

Merge branch 'documentation-for-json-backend' into 'master'

Document backends.json

See merge request pycodegen/pystencils!59
parents f1f2faee 44da4538
......@@ -9,6 +9,7 @@
import json
from pystencils.astnodes import NodeOrExpr
from pystencils.backends.cbackend import CustomSympyPrinter, generate_c
......@@ -28,11 +29,19 @@ except Exception:
def dumps(self, *args):
raise ImportError('pyyaml not installed')
def dump(self, *args):
raise ImportError('pyyaml not installed')
def expr_to_dict(expr_or_node: NodeOrExpr, with_c_code=True, full_class_names=False):
"""Converts a SymPy expression to a serializable dict (mainly for debugging purposes)
The dict recursively contains all args of the expression as ``dict``s
See :func:`.write_json`
def expr_to_dict(expr_or_node, with_c_code=True, full_class_names=False):
expr_or_node (NodeOrExpr): a SymPy expression or a :class:`pystencils.astnodes.Node`
with_c_code (bool, optional): include C representation of the nodes
full_class_names (bool, optional): use full class names (type(object) instead of ``type(object).__name__``
self = {'str': str(expr_or_node)}
if with_c_code:
......@@ -49,12 +58,26 @@ def expr_to_dict(expr_or_node, with_c_code=True, full_class_names=False):
return self
def print_json(expr_or_node):
def print_json(expr_or_node: NodeOrExpr):
"""Print debug JSON of an AST to string
expr_or_node (NodeOrExpr): a SymPy expression or a :class:`pystencils.astnodes.Node`
str: JSON representation of AST
dict = expr_to_dict(expr_or_node)
return json.dumps(dict, indent=4)
def write_json(filename, expr_or_node):
def write_json(filename: str, expr_or_node: NodeOrExpr):
"""Writes debug JSON represenation of AST to file
filename (str): Path for the file to write
expr_or_node (NodeOrExpr): a SymPy expression or a :class:`pystencils.astnodes.Node`
dict = expr_to_dict(expr_or_node)
with open(filename, 'w') as f:
json.dump(dict, f, indent=4)
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