therm_buk_read not triggered via python write operation

[h-wissing]

Hello,
I've tried triggering a bulk-conversion via writing "trigger" to the file therm_bulk_read as described

def iniTherm_bulk_read():
fdr = open("/sys/bus/w1/drivers/w1_master_driver/w1_bus_master1/therm_bulk_read", "w")
fdr.write("trigger")
fdr.close()

no action is seen using Python3 file systen but with after a bash call:

def iniTherm_bulk_read():
os.popen("echo trigger > /sys/bus/w1/drivers/w1_master_driver/w1_bus_master1/therm_bulk_read")

User permissions are set manually beforehand. Up to date Raspberry Bullseye 64-bit is used.

Regards
H. Wissing

[h-wissing]

Thought it were a beginners python notation error, because

fdr.write("trigger\n")

works.

But other write operations e.g. "resolution" do not need "\n" terminating the input string..
It seems that there is a inconsistency which should either be documented or removed.

Regards
H. Wissing