diff options
Diffstat (limited to 'python/pyspark/ml/param/__init__.py')
| -rw-r--r-- | python/pyspark/ml/param/__init__.py | 22 |
1 files changed, 20 insertions, 2 deletions
diff --git a/python/pyspark/ml/param/__init__.py b/python/pyspark/ml/param/__init__.py index 35c9b776a3..92ce96aa3c 100644 --- a/python/pyspark/ml/param/__init__.py +++ b/python/pyspark/ml/param/__init__.py @@ -32,12 +32,13 @@ class Param(object): .. versionadded:: 1.3.0 """ - def __init__(self, parent, name, doc): + def __init__(self, parent, name, doc, expectedType=None): if not isinstance(parent, Identifiable): raise TypeError("Parent must be an Identifiable but got type %s." % type(parent)) self.parent = parent.uid self.name = str(name) self.doc = str(doc) + self.expectedType = expectedType def __str__(self): return str(self.parent) + "__" + self.name @@ -247,7 +248,24 @@ class Params(Identifiable): Sets user-supplied params. """ for param, value in kwargs.items(): - self._paramMap[getattr(self, param)] = value + p = getattr(self, param) + if p.expectedType is None or type(value) == p.expectedType or value is None: + self._paramMap[getattr(self, param)] = value + else: + try: + # Try and do "safe" conversions that don't lose information + if p.expectedType == float: + self._paramMap[getattr(self, param)] = float(value) + # Python 3 unified long & int + elif p.expectedType == int and type(value).__name__ == 'long': + self._paramMap[getattr(self, param)] = value + else: + raise Exception( + "Provided type {0} incompatible with type {1} for param {2}" + .format(type(value), p.expectedType, p)) + except ValueError: + raise Exception(("Failed to convert {0} to type {1} for param {2}" + .format(type(value), p.expectedType, p))) return self def _setDefault(self, **kwargs): |