Empty strings are "falsy" (python 2 or python 3 reference), which means they are considered false in a Boolean context, so you can just do this: ... <看更多>

Python 3 Basics # 3.4 | How to check empty string in PythonMethods to be used:1. Normal check2. By using Not operator3. ... <看更多>

In this python tutorial, we discuss how to declare empty string in python ! We go over 2 methods you can use to declare empty strings in ... ... <看更多>

使用not operator 運算子 · #!/usr/bin/env python3 · # -*- coding: utf-8 -*- · # or s = str() · if · 's is empty' ... ... <看更多>

The type List[Tuple[str, str]] (in PEP 484 notation) covers lists of any size including the empty list. So saying that it could be empty is redundant. 10 ... <看更多>