How to use the laspy.file.File.File function in laspy

def verify(self):
    ## Set global varibles for convenience.
        file_1 = self.args.file_1[0]
        file_2 = self.args.file_2[0]
        PRESERVE = self.args.b 

    ## Try to open both files in read mode.
        try:
            inFile1 = laspy.file.File.File(file_1,mode= "r")
            inFile2 = laspy.file.File.File(file_2,mode= "r")
        except Exception as error:
            print("Error reading in files:")
            print(error)
            quit()

    ## Set global flag to indicate whether we need to look at incompatible
    ## bit field bytes. 
        SUB_BYTE_COMPATIBLE = ((inFile1.header.data_format_id <= 5) == 
                            (inFile2.header.data_format_id <= 5)) 

    ## Warn the user if they chose not to check incompatible point formats.
        if (not SUB_BYTE_COMPATIBLE) and (not PRESERVE):
            print("""WARNING: Point formats %i and %i have mismatched sub-byte fields. 
                    The default behavior in this case is to ignore these fields during 
                    the file_verify procedure. If you want laspy to attempt to match up
                    sub-byte data between these two formats, specify -b=True 

def verify(self):
    ## Set global varibles for convenience.
        file_1 = self.args.file_1[0]
        file_2 = self.args.file_2[0]
        PRESERVE = self.args.b 

    ## Try to open both files in read mode.
        try:
            inFile1 = laspy.file.File.File(file_1,mode= "r")
            inFile2 = laspy.file.File.File(file_2,mode= "r")
        except Exception as error:
            print("Error reading in files:")
            print(error)
            quit()

    ## Set global flag to indicate whether we need to look at incompatible
    ## bit field bytes. 
        SUB_BYTE_COMPATIBLE = ((inFile1.header.data_format_id <= 5) == 
                            (inFile2.header.data_format_id <= 5)) 

    ## Warn the user if they chose not to check incompatible point formats.
        if (not SUB_BYTE_COMPATIBLE) and (not PRESERVE):
            print("""WARNING: Point formats %i and %i have mismatched sub-byte fields. 
                    The default behavior in this case is to ignore these fields during 
                    the file_verify procedure. If you want laspy to attempt to match up