Add python 3.7 support, update CI targets

* Replace StopIteration with return statements

+ Changes conformal with PEP479
+ Fixes #106

* Add Python versions 3.6 and 3.7 to Travis CI

* Workaround for Python 3.7 in Travis CI

Author: weinshec

.travis.yml

@@ -1,9 +1,15 @@
 language: python
 sudo: false
 
-python:
-  - 3.4
-  - 3.5
+matrix:
+  include:
+    - python: 3.4
+    - python: 3.5
+    - python: 3.6
+    - python: 3.7
+      dist: xenial
+      sudo: true
+
 
 install:
   - python3 setup.py build install

pycaching/cache.py

@@ -827,13 +827,13 @@ def load_logbook(self, limit=float("inf")):
 
             if not logbook_page:
                 # result is empty - no more logs
-                raise StopIteration()
+                return
 
             for log_data in logbook_page:
 
                 limit -= 1  # handle limit
                 if limit < 0:
-                    raise StopIteration()
+                    return
 
                 img_filename = log_data["LogTypeImage"].rsplit(".", 1)[0]  # filename w/o extension
 
@@ -860,7 +860,7 @@ def load_trackables(self, limit=float("inf")):
         url = self._trackable_page_url  # will trigger lazy_loading if needed
         if not url:
             # no link to all trackables = no trackables in cache
-            raise StopIteration()
+            return
         res = self.geocaching._request(url)
 
         trackable_table = res.find_all("table")[1]
@@ -874,7 +874,7 @@ def load_trackables(self, limit=float("inf")):
 
             limit -= 1  # handle limit
             if limit < 0:
-                raise StopIteration()
+                return
 
             # create and fill trackable object
             t = Trackable(self.geocaching, None)

pycaching/geocaching.py

@@ -217,7 +217,7 @@ def search(self, point, limit=float("inf")):
 
             if not geocaches_table:
                 # result is empty - no more caches
-                raise StopIteration()
+                return
 
             # prepare language-dependant mappings
             if start_index == 0:
@@ -233,7 +233,7 @@ def search(self, point, limit=float("inf")):
 
                 limit -= 1  # handle limit
                 if limit < 0:
-                    raise StopIteration()
+                    return
 
                 # parse raw data
                 cache_details = row.find("span", "cache-details").text.split("|")