Action: To perform i2c scan on a particular channel in TCA9548A

...
# Initialize I2C bus.
i2c = busio.I2C(I2C1_SCL_PIN,I2C1_SDA_PIN)
# default TCA address=0x70
tca = adafruit_tca9548a.TCA9548A(i2c)

print([hex(i) for i in i2c.scan()])
print([hex(i) for i in tca[0].scan()])
...

Expected result: Perform i2c scan on selected channel

$ python i2c-mux.py 
['0x70']
['0x60', '0x70'] #MCP4725 DAC module is connected to channel 0 of TCA9548A
Press Entre to exit..

Actual Result: It Performs i2c scan on actual i2c bus where TCA9548A is connected

$ python i2c-mux.py 
['0x70']
['0x70']
Press Entre to exit..

Correction : TCA9548A_Channel.scan needs to be modified