Add -i repo_path to the status_command statement in your i3 config.
Example:
bar {
status_command py3status -i ~/src/aalto_outside_i3
}
Add a order += "aalto_outside_i3" statement into your
i3status.conf to enable the module.
The module has a format configuration parameter. It's a standard python
format string and the valid argument names are temp, pres,
moist and lum. All arguments are floating point values and
their units are °C, hPa, RH% and lux, respectively.
Example:
aalto_outside_i3 {
format = '{temp:.2f} °C'
}