pip's dependency resolver error

[ClemensLinnhoff]

When executing sudo -E ./pip3 install scenariogeneration I get the follwing error:

ERROR: pip's dependency resolver does not currently take into account all the packages that are installed. This behaviour is the source of the following dependency conflicts.
ipympl 0.9.3 requires matplotlib<4,>=3.4.0, which is not installed.
ipympl 0.9.3 requires pillow, which is not installed.
fmpy 0.3.15 requires attrs, which is not installed.
fmpy 0.3.15 requires lark, which is not installed.
fmpy 0.3.15 requires lxml, which is not installed.
fmpy 0.3.15 requires pytz, which is not installed.

I just executed it again and this time, no errors popped up. Is this normal behavior?

[ClemensLinnhoff]

Everything seems to work, though.

[johschmitz]

Haven't seen this so far, not sure about your system. Maybe try installing the lib into a fresh virtual python environment and see if it happens there as well. If so then it should be reported in the library github repository.