pyinstaller shows SyntaxWarning: "is" with a literal. Did you mean "=="?

[sorenwacker]

I am trying to package a plotly app with pyinstaller. During the process I get these warnings:

c:\users\soere\miniconda3\envs\ms-mint\lib\site-packages_plotly_utils\utils.py:214: SyntaxWarning: "is" with a literal. Did you mean "=="?
if (iso_string.split("-")[:3] is "00:00") or (iso_string.split("+")[0] is "00:00"):
c:\users\soere\miniconda3\envs\ms-mint\lib\site-packages\plotly\figure_factory_candlestick.py:194: SyntaxWarning: "is" with a literal. Did you mean "=="?
if direction is "increasing":
c:\users\soere\miniconda3\envs\ms-mint\lib\site-packages\plotly\figure_factory_candlestick.py:199: SyntaxWarning: "is" with a literal. Did you mean "=="?
elif direction is "decreasing":
c:\users\soere\miniconda3\envs\ms-mint\lib\site-packages\plotly\figure_factory_ohlc.py:176: SyntaxWarning: "is" with a literal. Did you mean "=="?
if direction is "increasing":
c:\users\soere\miniconda3\envs\ms-mint\lib\site-packages\plotly\figure_factory_ohlc.py:179: SyntaxWarning: "is" with a literal. Did you mean "=="?

[nicolaskruchten]

I think #2262 will resolve this.