Python基础

本文记录Python基础

语句

assert x>1  # 判断为真时，程序往下执行，常用于递归结构

符号

类(Class)

参考：https://blog.csdn.net/weixin_45191386/article/details/124551799

PyTorch神经网络里的

class NeuralNetwork(nn.Module):
    def __init__(self):
        super().__init__()  # 这里
        self.flatten = nn.Flatten()
        self.linear_relu_stack = nn.Sequential(
            nn.Linear(28*28, 512),
            nn.ReLU(),
            nn.Linear(512, 512),
            nn.ReLU(),
            nn.Linear(512, 10)
        )

os模块

https://blog.csdn.net/weixin_39747511/article/details/110062344

# 获取扩展名
import os
suffix = os.path.splitext(f)[-1]

计时器

import time

start_time = time.time()

# Your code block here

end_time = time.time()
execution_time = end_time - start_time

print(f"Execution time: {execution_time} seconds")

'''
Replace # Your code block here with the code you want to measure the execution time of. The time.time() function returns the current time in seconds since the Epoch (January 1, 1970), so by taking the difference between the start and end times, you get the execution time in seconds. The final line just prints out the execution time.
'''

https://blog.csdn.net/qq_42751978/article/details/129948414