Why does every string contain the empty string?

Question

\"ABCDE\" has no empty character. But when I type

\"\" in \"ABCDE\"

Python interpreter returns True.

Why?

is there

Answer 1

Here's a qualitative way to think about it. Consider the following:

>>> "foo"[0:0]
''

Doing a zero-width slice of a string returns ''. So, if you can get '' out of a string, it must be in the string and therefore '' in "foo" must be true.