added simple text example

tests/examples_arguments_syntax/input_example.py

@@ -0,0 +1,31 @@
+"""
+Interactive chart using the input element
+============================
+This is an example of a horizontal stacked bar chart using data which contains crop yields over different regions and different years in the 1930s.
+"""
+# category: interactive charts
+
+import altair as alt
+from vega_datasets import data
+
+search_input = alt.selection_point(
+    fields=['Name'],
+    empty=False,  # Start with no points selected
+    bind=alt.binding(
+        input='text',  # Change this to any of the options at https://developer.mozilla.org/en-US/docs/Web/HTML/Element/input#input_types
+        placeholder="Car model",
+        name='Search ',
+    )
+)
+alt.Chart(data.cars.url).mark_point(size=60).encode(
+    x='Horsepower:Q',
+    y='Miles_per_Gallon:Q',
+    tooltip='Name:N',
+    opacity=alt.condition(  # This condition would also need to be updated accordingly
+        search_input,
+        alt.value(1),
+        alt.value(0.05)
+    )
+).add_params(
+    search_input
+)