how to call a function in a class from main

我正在尝试从main..how中调用一个类定义的函数吗？

class file_process:
    def findb(self, id):
    ....  

def main():
  id = sys.argv[2]
 file_process.findb(id)//how to call findb function from main,this is giving an error

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Since finddb is a method, you need to call it on an instance of file_process :

file_process().finddb(id)

I strongly urge you to study up on Python and classes, I can recommend the Python tutorial, before you continue.

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您需要先创建一个类的实例：

process = file_process()
process.findb(id)

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