From 3232eeb534b5ac1ab503f7f36254227b1cfba1f9 Mon Sep 17 00:00:00 2001
From: Josh Morman <jmorman@perspectalabs.com>
Date: Fri, 30 Aug 2019 09:47:42 -0400
Subject: grc: add python snippets to GRC
This feature adds the ability to insert arbitrary code into the python
flowgraph. It gives a little more low-level flexibility for quickly
modifying flowgraphs and adding custom bits of code rather than having
to go and edit the generated py file
One example is synchronizing multiple USRP objects - sometimes you want
different sync than what is offered in the multi-usrp object, so you can
put a bit of code in the snippet block to do the custom synchronization
---
grc/core/params/param.py | 10 +++++++---
1 file changed, 7 insertions(+), 3 deletions(-)
(limited to 'grc/core/params/param.py')
diff --git a/grc/core/params/param.py b/grc/core/params/param.py
index 816588efe2..ef8d7df291 100644
--- a/grc/core/params/param.py
+++ b/grc/core/params/param.py
@@ -245,9 +245,13 @@ class Param(Element):
elif dtype in ('string', 'file_open', 'file_save', '_multiline', '_multiline_python_external'):
# Do not check if file/directory exists, that is a runtime issue
try:
- value = self.parent_flowgraph.evaluate(expr)
- if not isinstance(value, str):
- raise Exception()
+ # Do not evaluate multiline strings (code snippets or comments)
+ if dtype not in ['_multiline','_multiline_python_external']:
+ value = self.parent_flowgraph.evaluate(expr)
+ if not isinstance(value, str):
+ raise Exception()
+ else:
+ value = str(expr)
except Exception:
self._stringify_flag = True
value = str(expr)
--
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