How to tell if a string contains valid Python code
Solution 1:
Use ast.parse
:
import ast
def is_valid_python(code):
try:
ast.parse(code)
except SyntaxError:
return False
return True
>>> is_valid_python('1 // 2')
True
>>> is_valid_python('1 /// 2')
False
Solution 2:
The compiler module is now a built-in.
compile(source, filename, mode[, flags[, dont_inherit]])
Compile the source into a code or AST object. Code objects can be executed by an exec statement or evaluated by a call to eval(). source can either be a string or an AST object. Refer to the ast module documentation for information on how to work with AST objects.
The AST parser is now a seperate module.
ast.parse(expr, filename='<unknown>', mode='exec')
Parse an expression into an AST node. Equivalent to
compile(expr, filename, mode, ast.PyCF_ONLY_AST)
.