我尝试使用ast模块：
import ast
# which Syntax elements are allowed at module level?
whitelist = [
# docstring
lambda x: isinstance(x, ast.Expr) \
and isinstance(x.value, ast.Str),
# import
lambda x: isinstance(x, ast.Import),
# class
lambda x: isinstance(x, ast.ClassDef),
# function
lambda x: isinstance(x, ast.FunctionDef),
]
def validate(source, required_functions):
tree = ast.parse(source)
functions = set()
required_functions = set(required_functions)
for item in tree.body:
if isinstance(item, ast.FunctionDef):
functions.add(item.name)
continue
if all(not checker(item) for checker in whitelist):
return False
# at least the required functions must be there
return len(required_functions - functions) == 0
if __name__ == "__main__":
required_funcs = [ "init", "execute", "cleanup" ]
with open("/tmp/test.py", "rb") as f:
print("yay!" if validate(f.read(), required_funcs) else "d'oh!")
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