fix: update zillow xpath

We were selecting on an xpath that 1) is not present if the house is for
sale, and 2) some time recently either disappeared or became an element
that is added to the DOM in frontend. This new xpath should fix both of
these problems.

setup.cfg

@@ -1,6 +1,6 @@
 [metadata]
 name = real-estate-scrape
-version = 0.1.3
+version = 0.1.4
 description = Get the estimated value of a property from Redfin and Zillow
 long_description = file: README.md
 long_description_content_type = text/markdown

src/realestatescrape/__init__.py

@@ -11,8 +11,21 @@
 csvfile = "data.csv"
 plotfile = "data.png"
 sites = [
-    {"name": "redfin", "xpath": "//div[@class='statsValue']//span/text()"},
-    {"name": "zillow", "xpath": "//div[@id='home-details-home-values']//h3/text()"},
+    {
+        "name": "redfin",
+        "xpath": "//div[@class='statsValue']//span/text()",
+    },
+    {
+        "name": "zillow",
+        "xpath": (
+            # find the button containing "Zestimate"
+            "//button[contains(text(), 'Zestimate')]"
+            # find its parent
+            "/parent::node()"
+            # find its span descendent containing a "$"
+            "//span[contains(text(), '$')]/text()"
+        ),
+    },
 ]