1 #将字符串中得到所有大写字符转换成小写后,生成字符串 2 s = "ALEX" 3 s1 = "ß" #德语 4 string = s.casefold() 5 string1 = s1.casefold() 6 string2 = s.lower() 7 string3 = s1.lower() 8 print(string) 9 print(string1) 10 print(string2) 11 print(string3) 1. 2. 3. 4...
可以使用大括号 { } 或者 set() 函数创建集合, 创建格式: parame = {value01,value02,...} 或者 set(value) 1. 2. 3. ==注意:创建一个空集合必须用 set() 而不是 { },因为 { } 是用来创建一个空字典。== # 创建空集合 empty_set = set() print(type(empty_set)) # 输出 <class 'set'...
from random import randrange from tombola import Tombola @Tombola.register #① class TomboList(list): #② def pick(self): if self: #③ position = randrange(len(self)) return self.pop(position) #④ else: raise LookupError('pop from empty TomboList') load = list.extend #⑤ def loaded(se...
Decodes the string using the codec registered for encoding. encoding defaults to the default string encoding. errors may be given to set a different error handling scheme. The default is 'strict', meaning that encoding errors raise UnicodeError. Other possible values are 'ignore', 'replace' and...
*/ if (size < 0) { PyErr_SetString(PyExc_SystemError, "Negative size passed to PyUnicode_New"); return NULL; } if (size > ((PY_SSIZE_T_MAX - struct_size) / char_size - 1)) return PyErr_NoMemory(); /* 来自_PyObject_New()的重复分配代码,而不是对PyObject_New()的调用, 因此...
```# Python script to remove empty folders in a directoryimport osdef remove_empty_folders(directory_path):for root, dirs, files in os.walk(directory_path, topdown=False):for folder in dirs:folder_path = os.path.join(root,...
part = MIMEBase('application', 'octet-stream') part.set_payload(attachment.read()) encoders.encode_base64(part) part.add_header('Content-Disposition', f"attachment; filename= {file_path}") message.attach(part) server.sendmail(sender_email, recipient_email, message.as_string()) server.quit...
作用:去重,因为set集合的本质是无序,不重复的集合。所以转变为set集合的过程就是去重的过程 1# emptyset2print(set())34#fromstring5print(set('google'))67#fromtuple8print(set(('a','e','i','o','u')))910#fromlist11print(set(['g','o','o','g','l', 'e'])) ...
'NAME': 'supcon', # Your db name, Or path to database file if using sqlite3 'USER': 'root', # Your db user name, Not used withsqlite3'PASSWORD': '', # Your db password, Not used with sqlite3 'HOST': '127.0.0.1', # Your db host, set to empty string('') for default fo...
如果是空集合一定要使用set()来定义,如果包含元素则可以使用 “{}” 来定义,在集合中可以使用add来添加对应的元素,也可以使用remove来移除集合中的数,但是不能用来移除不存在的数,不然Python会报错。 empty = set() # 注意空集合不能使用{}定义print("空集合", empty)number = {1, 5, 1, 10}print("...