#myString is not None AND myString is not empty or blank return True #myString is None OR myString is empty or blank return False 1. 2. 3. 4. 5. 6. 上面代码的更简洁形式: def isBlank (myString): return not (myString and myString.strip()) def isNotBlank (myString): return bo...
如果my_string为空字符串,则会打印出"The string is empty"。 if not语句可以与其他条件语句一起使用吗? 是的,可以与其他条件语句(如elif和else)一起使用。if not语句通常用作条件语句的一部分,以便根据不同的条件执行不同的代码块。 总之,if not语句是Python中用于检查一个条件是否为False的常见语句。通过灵...
代码语言:python 代码运行次数:0 复制Cloud Studio 代码运行 string_value = "Hello, world!" if string_value: print("The string is not empty.") else: print("The string is empty.") 在这个例子中,因为string_value是一个非空字符串,所以if语句中的代码块将被执行,并且将输出“The string ...
print('String is not empty') Output: String is empty But if our variable contains None or blank spaces then this solution will not work. Check if a string is empty using not An empty string in python is equivalent to False in python. So, to check if a string is empty or not we ...
An empty string is false. Not of false =true None 值的使用: if not None: print("None is false. Not of false =true") 输出: None is false. Not of false =true set 值的用法: dictvar = {} print("The empty dict is of type", type(dictvar)) setvar = set(dictvar) print("...
My question is - is there a method .not_empty() to achieve this? I also wanted to ask if the second version is better in terms of performance? Otherwise maybe it makes sense for me to leave it as it is i.e. the first version? python python-3.x pandas Share Improve this question...
min_length is on the string constraints session but still works for lists. Share Follow answered Dec 13, 2023 at 19:23 Maicon Mauricio 2,71022 gold badges2121 silver badges3535 bronze badges Add a comment 2 In Python, empty lists are falsey, while lists with any number of elements...
Python If-Elif-Else 语句 有时我们想检查多个条件,并根据条件执行不同的代码块。我们可以使用 "if-elif-else "语句来实现这一目的。 "if-elif-else "语句的语法如下: if expression1: # 如果表达式1为真,将执行的代码 elif expression2: # 如果表达式2为真,表达式1为假,将执行的代码。
"# Empty unicode string 而在楼主所给的程序中,如果用户输入ENTER,那么state就是一个""。
在 Python 中,为真或假取决于对象的“真值”:# 空字符串(字符串类型) empty_string = "" if ...