MongoDB 和 pymongo 期望的文档类型必须是 dict、bson.son.SON、bson.raw_bson.RawBSONDocument,或者是从 collections.MutableMapping 继承的其他类型。如果提供的文档类型不符合这些要求,就会抛出此 TypeError。 注意:在你的错误信息中,“bson.son.son”和“bson.raw_bson.rawbsondocument”可能是笔误或版本差异导致...
在类里面定义的函数就是方法,类方法需要@classmethod修饰并且有个隐藏参数 cls,实例方法必须有个参数 self, 静态方法必须有@staticmethod修饰,类和实例都可以访问静态方法,实例可以访问实例方法也可以访问类方法,类可以访问类方法也可以访问实例方法,访问实例方法 必须要带参数 self, 可以理解为类其实也是一个实例,类访问...
It can reduce the temperature of the reduction reaction, shorten the reduction periods and eliminate MgCl2 in titanium sponge by using the technology of feeding raw materials from more than one places in the large-scale reactor. 而在大型反应器中采用多点加料工艺,可以降低还原反应温度,缩短还原周期,...
4) limestone raw material 石灰石生料5) blend ratio of burnt lime 生石灰配比 1. For high iron and low SiO2 sintering mix,an experimental study was made in laboratory aiming to improve the strength and productivity of sinter by means of technological measures such as increasing the blend ...
1) raw materials from coal measures 全煤化2) complete gasification gas 全气化煤气3) coal mine safety information quantification 煤矿安全信息化4) full automatic coal planer 全自动化刨煤机5) hololeims 煤化全植物体6) Coal Mine Safety Culture 煤矿安全文化 例句>> ...
5) micropolluted raw water 微污染原水 1. A process in a laboratory scale of micropolluted raw water treatment for drinking water by a fluidized bed bioreactor(FBBR) combined with conventional process was established and its performance was examined. 建立微污染原水生物流化床预处理传统工艺的组合...
1) refine raw materials from life 生活提炼2) life questioning 生活提问 例句>> 3) Raise the people's living standard 提高生活 例句>> 4) extraction [英][ɪk'strækʃn] [美][ɪk'strækʃən] 提炼 1. With practical examples, the industrial extraction process of acetone ...
1) raw sand from Fujian sea coast 福建砂例句>> 2) Fujian standard sand 福建标准砂 1. Two different contact stiffness models were used to simulate the behavior of Fujian standard sand under conventional triaxial compression condition. 利用离散单元法中的二维颗粒流方法(PFC2D),采用了两种不同接触...
2) micro-polluted raw water 微污染原水 1. Study on treatment of micro-polluted raw water from Changzhou Section of Yangtse River; 长江常州段微污染原水处理试验研究 2. Optimized design of a circumrotatory current integrative enhanced coagulation water cleaner and its effect on the treatment of ...