Merging PR_218 openai_rev package with new streamlit chat app

venv/lib/python3.9/site-packages/altair/examples/ranged_dot_plot.py

@@ -0,0 +1,43 @@
+"""
+Ranged Dot Plot
+-----------------
+This example shows a ranged dot plot that uses 'layer' to convey changing life expectancy for the five most populous countries (between 1955 and 2000).
+"""
+# category: other charts
+import altair as alt
+from vega_datasets import data
+
+source = data.countries.url
+
+chart = alt.layer(
+    data=source
+).transform_filter(
+    filter={"field": 'country',
+            "oneOf": ["China", "India", "United States", "Indonesia", "Brazil"]}
+).transform_filter(
+    filter={'field': 'year',
+            "oneOf": [1955, 2000]}
+)
+
+chart += alt.Chart().mark_line(color='#db646f').encode(
+    x='life_expect:Q',
+    y='country:N',
+    detail='country:N'
+)
+# Add points for life expectancy in 1955 & 2000
+chart += alt.Chart().mark_point(
+    size=100,
+    opacity=1,
+    filled=True
+).encode(
+    x='life_expect:Q',
+    y='country:N',
+    color=alt.Color('year:O',
+        scale=alt.Scale(
+            domain=['1955', '2000'],
+            range=['#e6959c', '#911a24']
+        )
+    )
+).interactive()
+
+chart