How to send the AT command in the quecpython

Can you please explain to me how to send the AT command to the module by using the quecpython EC-200U module

This method can support a few AT commands
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With this method, I can set the APN or not

hi,sivasiva

yes,but we generally recommend using an API to configure APN. Please refer to the link below.
dataCall - Data Call - QuecPython