defassert_empty_tuple(t):assertnott,"Tuple is not empty" 1. 2. 测试示例 下面是一个示例代码,演示了如何使用断言来判断tuple是否为空。 defassert_empty_tuple(t):assertlen(t)==0,"Tuple is not empty"defmain():t1=()assert_empty_tuple(t1)print("t1 is empty")t2=(1,2,3)assert_empty_tu...
iflen(my_list)==0:print("List is empty") Although the first approach is considered to be morePythonic, some people prefer the explicit second approach. Note that the officialPEP 8 Python Style Guiderecommends the first way: "For sequences, (strings, lists, tuples), use the fact that em...
Q: Can these methods be used to check if other collections, like tuples or dictionaries, are empty? A: Yes, these methods can be used to check if any collection in Python, not just lists, is empty. An empty tuple, dictionary, set, etc., are all consideredFalsein a boolean context,...
for x in Tuple: print(x) 4. Check if an item exist in tuple 要检查一个元组是否包含给定的元素,我们可以使用'in'关键词和'not in'关键词。 检查项目是否存在于元组中 Tuple = ("a", "b", "c", "d", "e", "f") if "a" in Tuple: print("Yes, 'a' is present") # Yes, 'a' i...
print("Record name is:", R1.name) # Record name is: My Record 9. Python Tuples Methods 9.1. any() 返回True如果至少一个元素存在于元组,并返回False如果元组是空的。 print( any( () ) ) # Empty tuple - False print( any( (1,) ) ) # One element tuple - True ...
How to check if dictionary/list/string/tuple is empty ? PEP 8 -- Style Guide for Python Code | Python.org https://www.python.org/dev/peps/pep-0008/ For sequences, (strings, lists, tuples), use the fact that empty sequences are false. Yes: if not seq: / if seq: No: if len...
当然,两者也可以通过list()和tuple()函数相互转换: 代码语言:javascript 代码运行次数:0 运行 复制 list((1, 2, 3)) [1, 2, 3] tuple([1, 2, 3]) (1, 2, 3) 最后,我们来看一些列表和元组常用的内置函数: 代码语言:javascript 代码运行次数:0 运行 复制 l = [3, 2, 3, 7, 8, 1] l....
重写loaded以避免调用inspect(就像示例 13-7 中的Tombola.loaded一样)。通过直接使用self._balls来工作,我们可以使其更快—不需要构建一个全新的tuple。⑤用一行代码重写inspect。示例13-10 展示了一个值得一提的习惯用法:在__init__中,self._balls存储list(iterable)而不仅仅是iterable的引用(即,我们并没有简单...
if type(p) == tuple: # this is bad Timing the code import time start = time.perf_counter() time.sleep(1) end = time.perf_counter() print(end-start) 外网内网ip 公网 curl http://httpbin.org/ip curl ifconfig.me 内网 ip addr | grep inet ...
print放到循环外面就可以了。另外，这种结构我觉得你应该考虑用dict def get_student_name(matric_num, records): for i in student_records: if i[0] == matric_num: return i[1] return "Not found"你把你的所有句子站出来