Python技术问询：如何将数值范围传入函数以筛选4的倍数？

Hey there! The issue with your code is pretty straightforward: your VariableOf4 method is designed to take a single number as input, but you're passing an entire range object to it. Python can't perform the % (modulo) operation on a range directly, which is why you're seeing an error.

Let's go through two easy fixes for this:

Option 1: Modify the Function to Handle Iterables #

Update your class method to accept any iterable (like a range, list, or tuple) and loop through each element inside the function. This is the cleaner approach if you want to pass collections of numbers directly:

class Calculator():
    def find_multiples_of_4(self, numbers):
        # Loop through each number in the input iterable
        for num in numbers:
            if num % 4 == 0:
                print(f"{num} is a multiple of 4")

# Create an instance of the Calculator class
c = Calculator()
# Define your range of numbers
numbers = range(0, 100)
# Pass the range directly to the modified method
c.find_multiples_of_4(numbers)

Note: I adjusted the names to follow Python's PEP8 style guidelines (class names in PascalCase, method names in snake_case) and fixed the wording "Variable Of 4" to the more accurate "multiple of 4".

Option 2: Loop Through the Range When Calling the Function #

If you want to keep the method focused on single numbers, just iterate over the range outside the function and pass each number individually:

class Calculator():
    def is_multiple_of_4(self, num):
        if num % 4 == 0:
            print(f"{num} is a multiple of 4")

c = Calculator()
numbers = range(0, 100)
# Loop through each number in the range and call the method
for num in numbers:
    c.is_multiple_of_4(num)

Why Your Original Code Failed #

When you run c.VariableOf4(numbers), you're passing a range object (not a single integer) to the method. The line num % 4 == 0 tries to compute the modulo of a range and an integer, which Python doesn't support—hence the TypeError: unsupported operand type(s) for %: 'range' and 'int' error you're seeing.

内容的提问来源于stack exchange，提问作者Alex Fate