Fix warnings

kingfisher_scrapy/base_spider.py

@@ -76,6 +76,7 @@ class BaseSpider(scrapy.Spider):
 
     ocds_version = '1.1'
     date_format = 'date'
+    date_required = None
 
     def __init__(self, sample=None, note=None, from_date=None, until_date=None, crawl_time=None,
                  keep_collection_open=None, package_pointer=None, release_pointer=None, truncate=None, qs=None, *args,
@@ -96,6 +97,7 @@ def __init__(self, sample=None, note=None, from_date=None, until_date=None, craw
         self.qs = qs
 
         self.date_format = self.VALID_DATE_FORMATS[self.date_format]
+        self.date_required = self.date_required
         self.pluck = bool(package_pointer or release_pointer)
 
         if self.qs and hasattr(self, 'start_requests'):

kingfisher_scrapy/spiders/nicaragua_solid_waste.py

@@ -21,13 +21,14 @@ class NicaraguaSolidWaste(SimpleSpider):
     url = 'http://www.gekoware.com/swmp/api/ocds/{}/{}'
 
     def start_requests(self):
+        url = self.url
         if self.sample:
             # date parameter setting to get one release from 2013
-            url = self.url.format('20130123', '20130123')
+            url = url.format('20130123', '20130123')
         else:
             if self.from_date and self.until_date:
                 # date parameter obtained
-                url = self.url.format(self.from_date.strftime("%Y%m%d"), self.until_date.strftime("%Y%m%d"))
+                url = url.format(self.from_date.strftime("%Y%m%d"), self.until_date.strftime("%Y%m%d"))
 
         # url looks like http://www.gekoware.com/swmp/api/ocds/20190101/20201005
         yield self.build_request(url, formatter=components(-2))