使用 getattr 调用函数时返回类 NoneType

如何解决使用 getattr 调用函数时返回类 NoneType

我正在尝试构建一个程序，该程序将替换数千种产品和每个产品的数十个功能的维度值。为此，我使用 re 在 XML 程序中查找和替换文本块。

在下面的代码中，我构建了一个类和一些函数，这些函数将返回将替换原始文本的内容。

我正在尝试使用我的 get() 函数动态调用我的类中的其他函数，但它只返回 而我需要返回 。

如果我只是调用 myClass.function() 它确实返回 。只有当我尝试通过 myClass.get() 调用我的函数时，它才会返回

任何帮助将不胜感激！

    
class Variable:
    def __init__(self,variable,metric_flag,nominal,upper_tol,lower_tol):
        self.variable = variable
        self.metric_flag = metric_flag
        self.nominal = nominal
        self.upper_tol = upper_tol
        self.lower_tol = lower_tol

    def get(self):
        def func_not_found():
            print(f'No Variable {self.variable} Found!')

        func_name = self.variable
        func = getattr(self,func_name,func_not_found)
        func()

    def wobble_comp(self):
        if self.metric_flag == 1:
            return f"""  <WobbleZ1>67.056</WobbleZ1>
            <WobbleX1>{mm(self.nominal) / 2}</WobbleX1>
            <WobbleZ2>12.7</WobbleZ2>
            <WobbleX2>{mm(self.nominal) / 2}</WobbleX2>"""
        else:
            return f"""  <WobbleZ1>67.056</WobbleZ1>
            <WobbleX1>{self.nominal / 2}</WobbleX1>
            <WobbleZ2>12.7</WobbleZ2>
            <WobbleX2>{self.nominal / 2}</WobbleX2>"""

    def axial_primary_relief_angle(self):
        return f"""  <ReliefAngle90No1Nominal>{self.nominal}</ReliefAngle90No1Nominal>
        <ReliefAngle90No1UpperTol>{self.upper_tol}</ReliefAngle90No1UpperTol>
        <ReliefAngle90No1LowerTol>{self.lower_tol}</ReliefAngle90No1LowerTol>"""

    def axial_primary_relief_land_width(self):
        if self.metric_flag == 1:
            return f"""  <Phase90Nominal>{mm(self.nominal)}</Phase90Nominal>
            <Phase90UpperTol>{mm(self.upper_tol)}</Phase90UpperTol>
            <Phase90LowerTol>{mm(self.lower_tol)}</Phase90LowerTol>"""
        else:
            return f"""  <Phase90Nominal>{self.nominal}</Phase90Nominal>
            <Phase90UpperTol>{self.upper_tol}</Phase90UpperTol>
            <Phase90LowerTol>{self.lower_tol}</Phase90LowerTol>"""

    def axial_secondary_relief_angle(self):
        return f"""  <ReliefAngle90No2Nominal>{self.nominal}</ReliefAngle90No2Nominal>
        <ReliefAngle90No2UpperTol>{self.upper_tol}</ReliefAngle90No2UpperTol>
        <ReliefAngle90No2LowerTol>{self.lower_tol}</ReliefAngle90No2LowerTol>"""

    def core_diameter(self):
        if self.metric_flag == 1:
            return f"""  <CoreScanNominal>{mm(self.nominal)}</CoreScanNominal>
            <CoreScanUpperTol>{mm(self.upper_tol)}</CoreScanUpperTol>
            <CoreScanLowerTol>{mm(self.lower_tol)}</CoreScanLowerTol>"""
        else:
            return f"""  <CoreScanNominal>{self.nominal}</CoreScanNominal>
            <CoreScanUpperTol>{self.upper_tol}</CoreScanUpperTol>
            <CoreScanLowerTol>{self.lower_tol}</CoreScanLowerTol>"""


variable1 = 'core_diameter'
metric_flag1 = 1
nominal1 = .125
high_tol1 = .001
low_tol1 = -.001

v = Variable(variable1,metric_flag1,nominal1,high_tol1,low_tol1)

print(type(v.core_diameter()))

print(type(v.get()))