Wrong message being displayed

[gnieradk]

You have done a good job with the library. Thank you! But I have a problem/question with the code in lines 54-56 of the MPU9250 module. The code which you have written is:

        name = self.__whoAmI()
        if not `(name[0] == 113 | name[0] == 115 ):`
            print ("The name is wrong {0}".format(name))

So the returning value from sensor is 0x71 which is value equals 113. If the code is the (name[0] == 113)is True; the(name[0] == 115) is False so the full condition (name[0] == 113 | name[0] == 115 ): is False. if not gives the True value and as a results the print line is executed and in my opinion the line should not be executed (because the sensor has proper value read by __whoAmI function. So my question is it is some mistake or I don't understand something properly? Thank You for work, help and explanation.

[niru-5]

Thanks for the compliment. I could not get to the issues last week as I busy with something else. I will soon try to create blogs for easy understanding and use-cases.

In your statement below If the code is the (name[0] == 113) is True; the (name[0] == 115) is False so the full condition ```(name[0] == 113	name[0] == 115 ):is False "OR" condition will give true if even one of them is true, so even if one of the conditionsname[0] == 113orname[0] ==115``` is true, it doesn't matter what the other statement is, it will just be true. The outside negation will make it false and hence the debug statements won't be printed. table for OR	Input 1	Input 2	Output
0	0	0
0	1	1
1	0	1
1	1	1

[gnieradk]

Thanks. I agree with You and of course You are right. I don't know why - but I had to change the OR operator from | to the Python or So the checking name line looks: (name[0] == 113 or name[0] == 115 ) And everything works as with the intention. Probably this is some Python specific thing with bitwise and logical operator but I don't know how to track the difference. BTW, thanks. You can close this topic.

[niru-5]

Sure.