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50 lines
1.6 KiB
Python
50 lines
1.6 KiB
Python
import ast
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import sys
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# We only use StringIO, since we cannot setattr on cStringIO
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from StringIO import StringIO
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def find_globals(g, tree):
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"""Uses AST to find globals in an ast tree"""
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for child in tree:
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if hasattr(child, 'body') and isinstance(child.body, list):
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find_globals(g, child.body)
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elif isinstance(child, (ast.FunctionDef, ast.ClassDef)):
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g.add(child.name)
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continue
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elif isinstance(child, ast.Assign):
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try:
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g.add(child.targets[0].id)
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except (IndexError, AttributeError):
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pass
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elif isinstance(child, ast.Import):
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g.add(child.names[0].name)
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elif isinstance(child, ast.ImportFrom):
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for name in child.names:
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g_name = name.asname or name.name
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if g_name == '*':
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continue
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g.add(g_name)
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class CaptureStd():
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"""Context manager to handle capturing stderr and stdout"""
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def __enter__(self):
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self.sys_stdout = sys.stdout
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self.sys_stderr = sys.stderr
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sys.stdout = self.stdout = StringIO()
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sys.stderr = self.stderr = StringIO()
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setattr(sys.stdout, 'encoding', self.sys_stdout.encoding)
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setattr(sys.stderr, 'encoding', self.sys_stderr.encoding)
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return self
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def __exit__(self, exc_type, exc_value, traceback):
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sys.stdout = self.sys_stdout
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sys.stderr = self.sys_stderr
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def get(self):
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"""Return ``(stdout, stderr)``"""
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return self.stdout.getvalue(), self.stderr.getvalue()
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