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本篇內(nèi)容主要講解“python運(yùn)行加速的方式有哪些”,感興趣的朋友不妨來(lái)看看。本文介紹的方法操作簡(jiǎn)單快捷,實(shí)用性強(qiáng)。下面就讓小編來(lái)帶大家學(xué)習(xí)“python運(yùn)行加速的方式有哪些”吧!
一、總結(jié)
二、全面加速(pypy)
二、減少文件的打開(kāi)即with的調(diào)用
三、if判斷靠前
1、使用pypy
2、減少函數(shù)化調(diào)用
3、減少文件的打開(kāi)即with的調(diào)用,將這一調(diào)用放在for循環(huán)前面,然后傳遞至后面需要用到的地方
4、if函數(shù)判斷條件多的盡量在前面
全面加速(pypy)
將python換為pypy,在純python代碼下,pypy的兼容性就不影響使用了,因?yàn)橐恍┘僷ython的代碼常常會(huì)用pypy進(jìn)行一下加速
測(cè)試代碼,for循環(huán)10000000次
start = time.time() for i in range(10000000): print(i,end="\r") end = time.time() print(f"耗費(fèi)時(shí)間{end-start}秒>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>")
pypy的耗時(shí)為:
而python耗時(shí)為
大致三倍,但是循環(huán)越多估計(jì)越快,據(jù)說(shuō)有6倍左右
原代碼的with在調(diào)用函數(shù)內(nèi),即每次調(diào)用函數(shù)都要打開(kāi)并關(guān)閉文件,造成大量耗時(shí)
def BMES(word,tag): with open(r"J:\PyCharm項(xiàng)目\學(xué)習(xí)進(jìn)行中\(zhòng)NLP教程\NLP教程\數(shù)據(jù)集\詞性標(biāo)注\nature2ner.txt","a+",encoding="utf-8")as f_: if len(word) == 1: """單字""" f_.write(word + " " + f"S-{tag.upper()}" + "\n") else: """多字""" for index, word_ in enumerate(word): if index == 0: f_.write(word_ + " " + f"B-{tag.upper()}" + "\n") elif 0 < index < len(word) - 1: f_.write(word_ + " " + f"M-{tag.upper()}" + "\n") else: f_.write(word_ + " " + f"E-{tag.upper()}" + "\n") #后續(xù)在多個(gè)if-elif-else中調(diào)用
耗時(shí)為
tqdm預(yù)估時(shí)間在15~25個(gè)小時(shí)左右跳動(dòng)
將with放在循環(huán)前面
如
將with的內(nèi)容作為f_傳遞進(jìn)來(lái)
后的耗時(shí)為:
測(cè)試如下:
import os, warnings,time,tqdm def txt(word): with open("ceshi.txt","a+",encoding="utf-8")as f: if len(str(word))<=2: word+=100 f.write(str(word)+"\n") elif 2<len(str(word))<=4: word+=200 f.write(str(word)+"\n") else: f.write(str(word) + "\n") if __name__=="__main__": start = time.time() for i in tqdm.tqdm(range(100000)): txt(i) end = time.time() print(f"耗費(fèi)時(shí)間{end-start}秒>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>")
耗時(shí)結(jié)果為:
將文件的打開(kāi)即with的調(diào)用放在外面
import os, warnings,time,tqdm def txt(f,word): if len(str(word))<=2: word+=100 f.write(str(word)+"\n") elif 2<len(str(word))<=4: word+=200 f.write(str(word)+"\n") else: f.write(str(word) + "\n") if __name__=="__main__": start = time.time() with open("ceshi.txt", "a+", encoding="utf-8")as f: for i in tqdm.tqdm(range(100000)): txt(f,i) end = time.time() print(f"耗費(fèi)時(shí)間{end-start}秒>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>")
耗時(shí)為
結(jié)論:快了119倍,而實(shí)際加速遠(yuǎn)遠(yuǎn)大于這個(gè)倍數(shù)
如:
if tag in ["nts", "nto", "ntc", "ntcb", "ntcf", "ntch", "nth", "ntu", "nt"]: BMES(f_,i2, tag="ORG") elif tag in ["nb", "nba", "nbc", "nbp", "nf", "nm", "nmc", "nhm", "nh"]: BMES(f_,i2, tag="OBJ") elif tag in ["nnd", "nnt", "nn"]: BMES(f_,i2, tag="JOB") elif tag in ["nr", "nrf"]: BMES(f_,i2, tag="PER") elif tag in ["t"]: BMES(f_,i2, tag="TIME") elif tag in ["ns", "nsf"]: BMES(f_,i2, tag="LOC") else: for i3 in list(i2): f_.write(i3 + " " + f"O" + "\n")
滿(mǎn)足條件的可以先跳出判斷
到此,相信大家對(duì)“python運(yùn)行加速的方式有哪些”有了更深的了解,不妨來(lái)實(shí)際操作一番吧!這里是億速云網(wǎng)站,更多相關(guān)內(nèi)容可以進(jìn)入相關(guān)頻道進(jìn)行查詢(xún),關(guān)注我們,繼續(xù)學(xué)習(xí)!
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