(self.worker_id) if self.counter > 0: result += self._encode(self.counter) result += self._encode(seconds) return result _worker_id = os.environ.get('shortid_worker', 0) _short_id = ShortId(_worker_id) set_alphabet = _short_id.set_alphabet generate = _short_id.generate reset_...
UUID(Universally Unique Identifier)是通用唯一识别码,在许多领域用作标识,比如我们常用的数据库也可以用它来作为主键,原理上它是可以对任何东西进行唯一的编码的。 import uuid name = "Li" namespace = "Frank" ''' 基于MAC地址,时间戳,随机数来生成唯一的uuid,可以保证全球范围内的唯一性。 ''' print(uuid...
import constants from django.http import HttpResponse #日志器 logger =logging.getLogger('django') def image_code_view(request): """ 生成验证码 url:/image_code/ :param request: :return: """ #1.生成一个验证码,随机生成字符串,生成图片 text, image = captcha.generate_captcha() #2.在后端保持...
print("\nUnique BearingIDs:") print(df['BearingID'].unique()) print(f"Total unique bearings: {df['BearingID'].nunique()}") # Count records per bearing print("\nRecords per bearing:") bearing_counts = df.groupby('BearingID').size() print(bearing_counts) # Convert Timestamp to dat...
简介:Python pandas库|任凭弱水三千,我只取一瓢饮(2) I~Q: Function10~25 Types['Function'][9:25]['infer_freq', 'interval_range', 'isna', 'isnull', 'json_normalize', 'lreshape', 'melt', 'merge', 'merge_asof', 'merge_ordered', 'notna', 'notnull', 'period_range', 'pivot', ...
https://www.dataquest.io/blog/jupyter-notebook-tips-tricks-shortcuts/ df = pd.read_csv("../data/titanic_train.csv") 我们的分析采用Titanic Dataset的训练数据集。 数据集链接: https://www.kaggle.com/c/titanic 现在我们已经加载了数据,后面将删除所有可识别个人身份的信息。列[“PassengerId”,“Nam...
IntegrityError:UNIQUEconstraintfailed: table_juzicode._id 错误原因: 1、建表时 _id字段是主键必须唯一:_id INTEGER PRIMARY KEY AUTOINCREMENT,当上述程序第1次执行时已经写入了_id=1的记录,第2次执行时_id=1的记录因为已经存在,所以再次插入就会导致IntegrityError。
result=[mapping_exprforvalueiniterableiffilter_expr]result=[{'key':value}forvalueiniterableifa_long_filter_expression(value)]result=[complicated_transform(x)forxiniterableifpredicate(x)]descriptive_name=[transform({'key':key,'value':value},color='black')forkey,valueingenerate_iterable(some_input)...
It must be globally unique. df_name = '<factory name>' # Specify your Active Directory client ID, client secret, and tenant ID credentials = ClientSecretCredential(client_id='<service principal ID>', client_secret='<service principal key>', tenant_id='<tenant ID>') resource_client = ...
{shortuuid} A shorter representation of photo's internal universally unique identifier (UUID) for the photo, a 22-character string unique to the photo, e.g. 'JYsxugP9UjetmCbBCHXcmu' {id} A unique number for the photo based on its primary key in the Photos database. A sequential integ...