What is the correct way of passing flight scripts to 2+ cfs individually?

[AFKBOI92]

Some scripts like in swap.py use
id2 = 1
id1 = 0
allcfs.crazyfliesById[id1]
allcfs.crazyfliesById[id2]

But that doesn't seem to work and returns an error: "" line 24, in main
allcfs.crazyfliesById[id1].goTo(pos1 + np.array([0, 0, Height1]), 0, 3.0)
KeyError: 0
[ros2run]Process exited with failure 1

However, for example when using this for two active cfs:
cf1 = allcfs.crazyflies[0]
cf2 = allcfs.crazyflies[1]
I am able to have them use the goTo and land functions freely.
The problem is sometimes when running the script multiple times, both drones swap their intended instructions while sometimes only one of them executes their intended script.
Also the id number in the [] doesn't seem to be linked the cf's last number in address.
For context one drone ends with E7 while the other ends with 01.
I am able to use numbers from -2 to 1 to assign the id in brackets.
For the flight part is this a known issue? and how do I correctly assign an id to my cf's?

Thanks in advance,

[whoenig]

• crayzfliesById: the ID refers to the last part of the URI, converted to decimal (e.g., if the URI ends with 0A, the ID would be 10). Only available for "legacy" Crazyswarm1 code.
• crazyflies: completely unordered array, not recommended to use unless you loop over all crazyflies
• crazyfliesByName: This is the recommended way, where the name is the string used on crazyflies.yaml

Flight issues: It's unfortunately a known issue that sometimes commands don't get executed. We believe that this is a firmware bug. The workaround is to send commands multiple times (e.g., in a for loop). The other issues you describe are probably linked to the incorrect usage of crazyflies[] vs. crazyfliesById - switch to crazyfliesByName instead.

[AFKBOI92]

Introducing a for loop seemed to do the trick just fine. I can't find an example anywhere that uses the 'crazyfliesByName' command. Could you perhaps show us how to reference a cf using that command?