本文實例總結了python動態載入套件的方法。分享給大家供大家參考,具體如下:
動態載入模組有三種方法
1. 使用系統函數__import_()
stringmodule = __import__('string')
2. 使用imp 模組
#import imp stringmodule = imp.load_module('string',*imp.find_module('string')) imp.load_source("TYACMgrHandler_"+app.upper(), filepath)
3. 用exec
#import_string = "import string as stringmodule" exec import_string
變數是否存在
#1. hasattr(Test,'t')
2. 'var' in locals ().keys()
3. 'var' in dir()
4. vars().has_key('s')
# 動態增加屬性
class Obj(object): pass def main(): list=["a","b", "c"] for i inrange(1,len(list),2): Obj = type('Obj',(),{list[i]:lambdaself,s:obj.__setattr__(s.split(" = ")[0],s.split(" = ")[1])}) obj =Obj() for i inrange(0,len(list),2): obj.__setattr__(list[i],list[i]) obj.a =1 obj.b("a =2") obj.b("c =3") printobj.a printobj.c if __name__ == '__main__': main()
動態載入套件:
def test(s,e): print s print e class C(): def __init__(self,name): print name def test(self): print 'class!!!'
載入器程式碼:
class Dynload(): def __init__(self,package,imp_list): self.package=package self.imp=imp_list def getobject(self): return __import__(self.package,globals(),locals(),self.imp,-1) def getClassInstance(self,classstr,*args): return getattr(self.getobject(),classstr)(*args) def execfunc(self,method,*args): return getattr(self.getobject(),method)(*args) def execMethod(self,instance,method,*args): return getattr(instance,method)(*args) #Test: dyn=Dynload('util.common',['*']) ins=dyn.getClassInstance('C','gao') dyn.execMethod(ins,'test') dyn.execfunc('test','Hello','function!')
#根據名字載入指定檔案
##
def loadapp(self, app): filepath="mgr/"+app+".py" if os.path.exists(filepath): imp.load_source("TYACMgrHandler_"+app.upper(), filepath) //修改了app.py,从新调用这个函数,新的代码自动生效
根據名字呼叫對應方法
return getattr(self, op)(args.get("port"), args) //op="start" args=dict getattr(self, self.request.method.lower())(*args, **kwargs)更多python動態載入套件的方法詳細介紹相關文章請關注PHP中文網!
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