02 2022 档案
摘要：Django ORM 连接超时的坑 数据库链接丢失异常 django.db.utils.OperationalError: (2013, 'Lost connection to MySQL server during query') 查询mysql全局变量SHOW GLOBAL VARIABLES;
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摘要：# 赋值 a = 1 b = a print(a, b) print(id(a), id(b)) # id是相同的 c = [1, 2, 3] d = c c[0] = "xiongsheng" print(c, d) # 浅拷贝 import copy li1 = [1, 2, 3] li2 =
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