Raspberry gpio & pigpio & nrf24l01+

Hello, I have two different python codes. (1) The 1st one is to control the moving of a very simple robot. The code is like below. Except the first line, all the “gpio” are lower cases. import [login to view URL] as gpio import time def init(): [login to view URL]([login to view URL]) [login to view URL](19, [login to view URL]) … def forward(tf): init() [login to view URL](19, True) … [login to view URL](tf) [login to view URL]() while (1): forward (4) [login to view URL] (4) (2) For the 2nd python code, I have nrf24l01 device, and I also use pigpio library. The nrf24l01 is to send and to receive data, and the pigpio library is to control some pins to do some works Import [login to view URL] as GPIO From lib_nrf24 import NRF24 Import time Import spidev Import pigpio pi = [login to view URL] () [login to view URL] ([login to view URL]) …. [login to view URL] (message) # this line to send data, AND IT HAS TRACEBACK ERROR …. [login to view URL](receivedMessage, [login to view URL]()) # this line to receive data … The 1st and 2nd codes are working perfectly when they are not coupled together, but when I place them together, it is not working. I change all “gpio” to “GPIO” in the first code before coupling the two codes together but it is still not working. Would you advise me what could be the reason? The error seems related to gpio setting of nrf24l01 device. I get pigpio library from [login to view URL], and nrf24l01 library is from [login to view URL]