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-rw-r--r--crocoite/controller.py4
1 files changed, 3 insertions, 1 deletions
diff --git a/crocoite/controller.py b/crocoite/controller.py
index 81f0638..ee05b04 100644
--- a/crocoite/controller.py
+++ b/crocoite/controller.py
@@ -241,12 +241,14 @@ class DepthLimit (RecursionPolicy):
"""
Limit recursion by depth.
- depth==0 means no recursion, depth==1 is the page and outgoing links, …
+ depth==0 means no recursion, depth==1 is the page and outgoing links
"""
__slots__ = ('maxdepth')
def __init__ (self, maxdepth=0):
+ if maxdepth < 0 or maxdepth > 1:
+ raise ValueError ('Unsupported')
self.maxdepth = maxdepth
def __call__ (self, urls):