python2.7 使用super关键词报错 TypeError: must be type, not&n

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python2.7 使用super关键词报错 TypeError: must be type, not&n

错误试验代码: class Base(): def meth(self): print "i'm base" class Derived(Base): def meth(self): super(Derived,self).meth() print "this is derived" print Derived().meth() 报错原因: super只能用于python的新类中,如果基类是经典类,则会报这个错. 新类和经典类又是什么呢? 新类:所有类都必须要有继承…

python pip install 报错TypeError: unsupported operand type(s) for -=: 'Retry' and 'int' Command "python setup.py egg_info" failed with error code 1 in

pip install http://download.pytorch.org/whl/cu80/torch-0.2.0.post3-cp27-cp27mu-manylinux1_x86_64.whl pip install torchvision 今天在按照上面的命令安装pytorch的时候,首先将whl文件下载到本地,然后直接pip install该文件,再安装的时候报错,TypeError: unsupported operand type(s) for -=: 'Retry' and '…

【转】python 调用super()初始化报错“TypeError: super() takes at least 1 argument”

一.实验环境 1.Windows7x64_SP1 2.Anaconda2.5.0 + python2.7(anaconda集成,不需单独安装) 二.实验步骤 2.1 在python中有如下代码: class father(): def __init__(self,age): self.age = age; def get_age(self): print(self.age); class son(father): def __init__(self,age): super().__init__(…

解决pip安装时出现报错TypeError unsupported operand type(s) for -= 'Retry' and 'int'

1.参考 https://stackoverflow.com/questions/42610545/typeerror-unsupported-operand-types-for-retry-and-int-during-pip 需要设置代理 2.参考https://zhang0peter.com/2018/11/02/pip/ 使用 python -m pip install --upgrade pip更新pip 3.参考https://www.cnblogs.com/YenKoc/p/133…