regex101: Get python function declaration

Regular Expression

(?P<function>def\s+(?P<function_name>\w+)\s*\((?P<parameters>(?:.|\n)*?)\):\s*(?:\n[ \t]+.*?)*\n)

def sample_function1(arg1, arg2):
    result = arg1 + arg2
    if result > 10:
        print("Greater than 10")
    else:
        print("Not greater than 10")
    return result

def sample_function2(arg1, arg2):
    result = arg1 - arg2
    if result < 0:
        print("Negative result")
    else:
        print("Non-negative result")
    return result

def sample_function3(arg1, 
                     arg2):
    result = arg1 + arg2
    if result > 10:
        print("Greater than 10")
    else:
        print("Not greater than 10")
    return result

class SampleClass1:
    def __init__(self, arg1, arg2):
        self.arg1 = arg1
        self.arg2 = arg2

    def sample_method1(self):
        result = self.arg1 + self.arg2
        return result

class SampleClass2:
    def __init__(self, 
                 arg1, 
                 arg2):
        self.arg1 = arg1
        self.arg2 = arg2

    def sample_method1(self):
        result = self.arg1 + self.arg2
        return result