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import time import numpy as np import pandas as pd from multiprocessing import Pool from multiprocessing.dummy import Pool as ThreadPool def myfun(i): time.sleep(0.2) print(np.sin(i)+np.cos(i)*np.tan(i),end=' ') start = time.time() for i in range.

1、直接安装scrapy一般会出现错误 pip install scrapy 会出现以下错误： Command "d:\anaconda\python.exe -u -c "import setuptools, tokenize;__file__='C:\\Users\\95\\AppData\\Local\\Temp\\pip-install-tfqwb8 5p\\Twisted\\set...