Easy AST validation
A series of AST validators for validating the integrity of the tree.
The stable interface is
validate(tree: AST, level: Optional[int] = None) -> bool,
which comes directly from the root of the package. It takes the tree, and optionally the
validation level. Validation level specifies the strictness degree; for an example if it
is 1, tree will be only checked by some basic checks that is similiar to
Python/ast.c. Increasing levels means increasing checks and strictness.
import ast from astvalidate import validate tree = ast.parse("def x(): raise X from Y") assert validate(tree)
If the validator encounters with anything that shouldn't be, it raises a
with the node's line number and column offset. Also the original node that caused the
error is attached to the exception's
tree.body.body.exc = None assert validate(tree)
SyntaxError: Raise's cause can't be used without setting an exception
|Syntatical||1||Emulates syntax warnings that are normally generated by compiler.|
|Simple||1||Does simple verifications, similiar to
|Symbolic||2||Emulates syntax error that are normally generated by symbol table|
|Contextual||3||Ensures everything is in the right context.|
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