Merge pull request #29 from illusional/docs-fix

Docs fix

Author: illusional

README.md

@@ -68,8 +68,7 @@ yaml_export = tool_object.export_string()
 tool_object.export()
 
 # print to file
-with open("echotool.cwl", "w") as f:
-    tool_object.export(f)
+tool_object.export("echotool.cwl")
 ```
 
 ## References

cwlgen/requirements.py

@@ -23,6 +23,9 @@ def __init__(self, req_class):
     def get_class(self):
         return self._req_class
 
+    def __hash__(self):
+        return hash(self.get_class())
+
     @classmethod
     def parse_dict(cls, d):
 

examples/readme_example.py

@@ -15,3 +15,5 @@
 
 # print to console
 tool_object.export()
+
+tool_object.export("echotool.cwl")