tensor/utils.py
def contains(self, k):
        """Return True if key `k` exists"""
        if self._changed():
            self._read()
        return k in self.store.keys()
def contains(self, k):
        """Return True if key `k` exists"""
        if self._changed():
            self._read()
        return k in self.store.keys()
Return True if key `k` exists