Server IP : 85.214.239.14 / Your IP : 3.144.104.175 Web Server : Apache/2.4.62 (Debian) System : Linux h2886529.stratoserver.net 4.9.0 #1 SMP Tue Jan 9 19:45:01 MSK 2024 x86_64 User : www-data ( 33) PHP Version : 7.4.18 Disable Function : pcntl_alarm,pcntl_fork,pcntl_waitpid,pcntl_wait,pcntl_wifexited,pcntl_wifstopped,pcntl_wifsignaled,pcntl_wifcontinued,pcntl_wexitstatus,pcntl_wtermsig,pcntl_wstopsig,pcntl_signal,pcntl_signal_get_handler,pcntl_signal_dispatch,pcntl_get_last_error,pcntl_strerror,pcntl_sigprocmask,pcntl_sigwaitinfo,pcntl_sigtimedwait,pcntl_exec,pcntl_getpriority,pcntl_setpriority,pcntl_async_signals,pcntl_unshare, MySQL : OFF | cURL : OFF | WGET : ON | Perl : ON | Python : ON | Sudo : ON | Pkexec : OFF Directory : /proc/self/root/proc/2/cwd/proc/self/root/lib/python2.7/compiler/ |
Upload File : |
"""Parser for future statements """ from compiler import ast, walk def is_future(stmt): """Return true if statement is a well-formed future statement""" if not isinstance(stmt, ast.From): return 0 if stmt.modname == "__future__": return 1 else: return 0 class FutureParser: features = ("nested_scopes", "generators", "division", "absolute_import", "with_statement", "print_function", "unicode_literals") def __init__(self): self.found = {} # set def visitModule(self, node): stmt = node.node for s in stmt.nodes: if not self.check_stmt(s): break def check_stmt(self, stmt): if is_future(stmt): for name, asname in stmt.names: if name in self.features: self.found[name] = 1 else: raise SyntaxError, \ "future feature %s is not defined" % name stmt.valid_future = 1 return 1 return 0 def get_features(self): """Return list of features enabled by future statements""" return self.found.keys() class BadFutureParser: """Check for invalid future statements""" def visitFrom(self, node): if hasattr(node, 'valid_future'): return if node.modname != "__future__": return raise SyntaxError, "invalid future statement " + repr(node) def find_futures(node): p1 = FutureParser() p2 = BadFutureParser() walk(node, p1) walk(node, p2) return p1.get_features() if __name__ == "__main__": import sys from compiler import parseFile, walk for file in sys.argv[1:]: print file tree = parseFile(file) v = FutureParser() walk(tree, v) print v.found print