= obj.mod_list: return False return True class Startup(object): """Startup configuration information current: current startup configuration next: current next startup configuration """ def __init__(self): self.current, self.next = self.get_startup_info() self.is_need_clear_config = ...
}else{// 开辟内存,深究下面有点复杂op = (PyFloatObject*) PyObject_MALLOC(sizeof(PyFloatObject));if(!op)returnPyErr_NoMemory(); }/* Inline PyObject_New */// 在开辟好的内存中进行初始化/* - PyObject_Init(op, typeobj) and PyObject_InitVar(op, typeobj, n) don't allocate memory. In...
对于py 文件,Python 虚拟机会先对py 文件进行编译产生PyCodeObject 对象,然后执行了co_code 字节码,即通过执行def、class 等语句创建PyFunctionObject、PyClassObject 等对象,最后得到一个从符号映射到对象的dict,自然也就是所创建的module 对象中维护的那个dict。 import 创建的module 都会被放到全局module 集合 sys.mo...
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_Py_TPFLAGS_MATCH_SELF,/* tp_flags */// 标记dict_traverse,/* tp_traverse */// 遍历函数dict_tp_clear,/* tp_clear */// 清除函数dict_init,/* tp_init */// __init__PyType_GenericAlloc,/* tp_alloc */// 分配内存dict_new,/* tp_new */// __new__,创建实例对象PyObject_GC_Del...
Iterator is like range(11), compare to list = [0,1,...,10] all data is stored in memory. Iterator only generates values from looping through the object. # to get iterator from range function x = range(10) iter(x) x.__iter__() ...
并用memory_profiler 来监控代码占用的内存 列表推导法例子: # 如果系统没有这个模块就执行pip install memory_profiler进行安装 from memory_profiler import profile @profile def fun_try(): test = [] for i in range(20000): test.append(i) for num in [t for t in test]: print(num) fun_try()...
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'pandas.core.frame.DataFrame'> RangeIndex: 6040 entries, 0 to 6039 Data columns (total 5 columns): UserID 6040 non-null int64 Gender 6040 non-null object Age 6040 non-null int64 Occupation 6040 non-null int64 Zip-code 6040 non-null object dtypes: int64(3), object(2) memory usage: ...
clear – clear row values in memory Y - delete – delete a row from a database table Y 元组必须有唯一键或者主键。 truncate – quickly empty database tables Y - get_as_list/dict – read a table as a list or dictionary Y - escape_literal/identifier/string/bytea – escape for SQL Y...