Merge pull request #419 from azarboon/patch-1

Update README.md

Author: faif

README.md

@@ -3,6 +3,8 @@ python-patterns
 
 A collection of design patterns and idioms in Python.
 
+Remember that each pattern has its own trade-offs. And you need to pay attention more to why you're choosing a certain pattern than to how to implement it.
+
 Current Patterns
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