mirror of
https://github.com/aykhans/AzSuicideDataVisualization.git
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62 lines
1.6 KiB
Python
62 lines
1.6 KiB
Python
import ast
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import sys
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if sys.version_info > (3, 8):
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Module = ast.Module
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else:
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# Mock the Python >= 3.8 API
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def Module(nodelist, type_ignores):
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return ast.Module(nodelist)
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class _CatchDisplay(object):
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"""Class to temporarily catch sys.displayhook"""
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def __init__(self):
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self.output = None
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def __enter__(self):
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self.old_hook = sys.displayhook
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sys.displayhook = self
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return self
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def __exit__(self, type, value, traceback):
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sys.displayhook = self.old_hook
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# Returning False will cause exceptions to propagate
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return False
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def __call__(self, output):
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self.output = output
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def eval_block(code, namespace=None, filename="<string>"):
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"""
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Execute a multi-line block of code in the given namespace
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If the final statement in the code is an expression, return
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the result of the expression.
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"""
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tree = ast.parse(code, filename="<ast>", mode="exec")
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if namespace is None:
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namespace = {}
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catch_display = _CatchDisplay()
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if isinstance(tree.body[-1], ast.Expr):
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to_exec, to_eval = tree.body[:-1], tree.body[-1:]
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else:
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to_exec, to_eval = tree.body, []
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for node in to_exec:
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compiled = compile(Module([node], []), filename=filename, mode="exec")
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exec(compiled, namespace)
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with catch_display:
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for node in to_eval:
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compiled = compile(
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ast.Interactive([node]), filename=filename, mode="single"
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)
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exec(compiled, namespace)
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return catch_display.output
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