# 好的实践:直接创建frozenset fs = frozenset([1, 2, 3]) # 避免:先创建set再转换 s = set([1, 2, 3]) fs = frozenset(s) # 额外的转换步骤 错误处理: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 def safe_create_frozenset(data): try: return frozenset(data) except TypeError as e...
import pygame as p import random as r # Initialize the pygame p.init() color_code_black = [0, 0, 0] color_code_white = [255, 255, 255] # Set the height and width of the screen DISPLAY = [500, 500] WINDOW = p.display.set_mode(DISPLAY) # Create an empty list to store posit...
defcreate_template(ip,port,**kwargs):# kwargs 作为可选参数,用来配置settings和其他项 header={"X-ApiKeys":"accessKey={accesskey};secretKey={secretkey}".format(accesskey=accesskey,secretkey=secretkey),"Content-Type":"application/json","Accept":"text/plain"}policys={}# 这里 grouppolicy_set ...
# Create your views here. from django.template import Context, loader from django.http import HttpResponse from myproj.myapp.models import locations def index(request): location_list = locations.objects.all().order_by('location_id') tmpl = loader.get_template("index.html") cont = Context({...
create table person( id int auto_increment primary key not null, name varchar(10) not null, age int not null )charset=utf8 """ # 执行sql语句; cursor.execute(sql) # 断开数据库的连接; db.close() 1. 2. 3. 4. 5. 6. 7.
get/set_namedresult – conversion to named tuples Y - get/set_decimal – decimal type to be used for numeric values Y - get/set_decimal_point – decimal mark used for monetary values Y - get/set_bool – whether boolean values are returned as bool objects Y - get/set_array – whether...
import plotly.graph_objects as goimport numpy as npimport pandas as pd# 读取数据temp = pd.read_csv('2016-weather-data-seattle.csv')# 数据处理, 时间格式转换temp['year'] = pd.to_datetime(temp['Date']).dt.year# 选择几年的数据展示即可year_list = [1950, 1960, 1970, 1980, 1990, 2000...
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setvalue(pos, value) 用于在给定位置设置值 为了进行一些 LOB 试验,我们使用下面的 DDL 创建如下所列的一些对象: CREATE TABLE lobs ( c CLOB, nc NCLOB, b BLOB, bf BFILE ); CREATE VIEW v_lobs AS SELECT ROWID id, c, nc, b, bf,
static PyObject * make_new_set(PyTypeObject *type, PyObject *iterable) { PySetObject *so = NULL; /* create PySetObject structure */ so = (PySetObject *)type->tp_alloc(type, 0); if (so == NULL) return NULL; // 集合当中目前没有任何对象,因此 fill 和 used 都是 0 so->fill = ...