threading error (NameError: name 'xxx' is not defined)

[gregcope]

hi all,

I am trying to make a Class that merges L76GNSS and micropyGPS. I would like to create a thread to feed the micropyGPS object with NMEA data in the background.

My code is here; https://github.com/gregcope/L76micropyGPS.

Basically;

class L76micropyGPS:

    def __init__(self, my_gps, pytrack=None, sda='P22', scl='P21', timeout=None):
    <snippage>
    # start thread feeding microGPS
        _thread.start_new_thread(feedMicroGPS, '')

    def feedMicroGPS(self):
       # <snippage>
        while True:
           
            # get some NMEA data
            someNmeaData = self.i2c.readfrom(GPS_I2CADDR, 128)
            print(" feedGps_thread - gpsChars recieved : {}".format(len(someNmeaData)))

            # Pass NMEA data to micropyGPS object
            for x in someNmeaData:
                self.my_gps.update(x)

However I get this error;

Traceback (most recent call last):
File "main.py", line 21, in <module>
File "/flash/lib/L76micropyGPS.py", line 41, in init
NameError: name 'feedMicroGPS' is not defined

What I am doing wrong?

[timh]

@gregcope you call _thread.start_new_thread(feedMicroGPS, '') can't find feedMicroGPS which is to be expected, it's definition is not in the scope of the init method.

You should either be using self.feedMicroGPS or cls.feedMicroGPS (if it where a class method).

The examples use a function not a method.

[gregcope]

Brilliant. Thanks. Now fails much further on!

I had assumed that as methods in python are declared as functions that this should just work(tm).

Thanks again.

[timh]

Functions and methods are actually different things and exist in different scopes.
You can't look up a method by name without the self. (or similiar) prefix. Unless you bind it to another name in the current scope.

The same applies to class methods.