%d format: a number is required, not builtin_function_or_method

This error occurs when you try to format a non-numeric value with the `%d` placeholder. For example:

name = "John"
print("Hello, %d!" % name)

To fix this error, you should use the `%s` placeholder instead, which is used for string formatting:

name = "John"
print("Hello, %s!" % name)

相关问题

TypeError: %d format: a number is required, not builtin_function_or_method

这个错误通常发生在使用字符串格式化时，使用了无效的格式化符号。更具体地说，它指的是使用了“%d”格式化符号，但提供的参数不是数字，而是内置的函数或方法。

例如，以下代码将导致此错误：

num = len
print("The number is %d" % num)

在这个例子中，`num` 被赋值为 `len` 函数，而不是数字。当我们尝试使用 `%d` 格式化符号将其插入字符串中时，Python 就会抛出上述错误。

要解决这个错误，需要检查代码中使用的所有格式化符号，确保它们与提供的参数的类型匹配。在上面的例子中，我们可以通过将 `num` 更改为数字来解决该错误，例如：

num = 10
print("The number is %d" % num)

TypeError: 'builtin_function_or_method' object is not iterable

This error occurs when you try to iterate over a function or method object, which is not iterable.

For example, consider the following code:

def my_function(x):
    return x + 1

for i in my_function:
    print(i)

In this code, we are trying to iterate over the `my_function` function, which is not iterable. Hence, we will get the TypeError: 'builtin_function_or_method' object is not iterable.

To fix this error, you need to ensure that you are iterating over an iterable object such as a list, tuple, or dictionary, and not a function or method object.