docs: add code samples for str accessor methdos (#594)

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Author: shobsi

bigframes/operations/strings.py

@@ -53,7 +53,25 @@ def lower(self) -> series.Series:
  return self._apply_unary_op(ops.lower_op)
 
  def reverse(self) -> series.Series:
- """Reverse strings in the Series."""
+ """Reverse strings in the Series.
+
+ **Examples:**
+
+ >>> import bigframes.pandas as bpd
+ >>> bpd.options.display.progress_bar = None
+
+ >>> s = bpd.Series(["apple", "banana", "", bpd.NA])
+ >>> s.str.reverse()
+ 0 elppa
+ 1 ananab
+ 2
+ 3 <NA>
+ dtype: string
+
+ Returns:
+ bigframes.series.Series: A Series of booleans indicating whether the given
+ pattern matches the start of each string element.
+ """
  # reverse method is in ibis, not pandas.
  return self._apply_unary_op(ops.reverse_op)
 

scripts/get_documentation_coverage.py

@@ -97,6 +97,10 @@ def get_coverage_summary(
  if name.startswith("_") and not name.startswith("__"):
  continue
 
+ # ignore constructor
+ if name == "__init__":
+ continue
+
  def predicate(impl):
  return (
  # This includes class methods like `from_dict`, `from_records`