Github user zjffdu commented on the issue:
https://github.com/apache/zeppelin/pull/2474
Thanks @Leemoonsoo for catching that. This is due to I miss cursor for code
completion. Just pushed another commit to fix that and add more unit test for
it.
```
// there's no completion for 'a.' because it is not recognized by
compiler for now.
String st = "a='hello'\na.";
completions = interpreter.completion(st, st.length(),
getInterpreterContext());
assertEquals(0, completions.size());
// define a first
st = "a='hello'";
result = interpreter.interpret(st, getInterpreterContext());
assertEquals(InterpreterResult.Code.SUCCESS, result.code());
// now we can get the completion for `a.`
st = "a.";
completions = interpreter.completion(st, st.length(),
getInterpreterContext());
// it is differnet for python2 and python3 and may even different for
different minor version
// so only verify it is larger than 20
assertTrue(completions.size() > 20);
st = "a.ca";
completions = interpreter.completion(st, st.length(),
getInterpreterContext());
// a.capitalize
// a.casefold
assertEquals(2, completions.size());
// cursor is in the middle of code
st = "a.ca\b='hello";
completions = interpreter.completion(st, 4, getInterpreterContext());
// a.capitalize
// a.casefold
assertEquals(2, completions.size());
```
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