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Python __call__()方法 __init__()方法

程序员文章站 2022-04-02 10:53:28
__call__()方法作用在于:类–>实例化–>实例也能当成一个可调用对象net = Net() #类的实例out = net(input) #实例也能当成一个可调用对象import torchimport torch.nn as nnimport torch.nn.functional as Fclass Net(nn.Module): def __init__(self): super(Net, self).__init__()...

__call__()方法作用在于:
类–>实例化–>实例也能当成一个可调用对象
net = Net() #类的实例
out = net(input) #实例也能当成一个可调用对象

import torch
import torch.nn as nn
import torch.nn.functional as F


class Net(nn.Module):

    def __init__(self):
        super(Net, self).__init__()
        # 输入图像channel:1;输出channel:6;5x5卷积核
        self.conv1 = nn.Conv2d(1, 6, 5)
        self.conv2 = nn.Conv2d(6, 16, 5)
        # an affine operation: y = Wx + b
        self.fc1 = nn.Linear(16 * 5 * 5, 120)
        self.fc2 = nn.Linear(120, 84)
        self.fc3 = nn.Linear(84, 10)

    def forward(self, x):
        # 2x2 Max pooling
        x = F.max_pool2d(F.relu(self.conv1(x)), (2, 2))
        # 如果是方阵,则可以只使用一个数字进行定义
        x = F.max_pool2d(F.relu(self.conv2(x)), 2)
        x = x.view(-1, self.num_flat_features(x))
        x = F.relu(self.fc1(x))
        x = F.relu(self.fc2(x))
        x = self.fc3(x)
        return x

    def num_flat_features(self, x):
        size = x.size()[1:]  # 除去批处理维度的其他所有维度
        num_features = 1
        for s in size:
            num_features *= s
        return num_features


net = Net()
print(net)

params = list(net.parameters())
print(len(params))
print(params[0].size())  # conv1's .weight

input = torch.randn(1, 1, 32, 32)
out = net(input)
print(out)


文章:
http://c.biancheng.net/view/2380.html

class CLanguage:
    # 定义__call__方法
    def __call__(self,name,add):
        print("调用__call__()方法",name,add)

clangs = CLanguage()
clangs("C语言中文网","http://c.biancheng.net")

Python 中,凡是可以将 () 直接应用到自身并执行,都称为可调用对象。可调用对象包括自定义的函数、Python 内置函数以及本节所讲的类实例对象。

文章:
https://blog.csdn.net/Yaokai_AssultMaster/article/details/70256621

本文地址:https://blog.csdn.net/x1131230123/article/details/110943513

相关标签: python语言