April 2023
Intermediate to advanced
769 pages
25h 16m
Chinese
Content preview from 流畅的Python（第2版）
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并发执行器
｜
587
flags2
系列示例的另一个特色是提供了命令行接口。
3
个脚本接受的选项相同，运行任意
一个脚本时指定
-h
选项就能看到所有选项。示例
20-10
显示的是帮助文本。
示例
20-10
flags2
系列脚本的帮助界面
$ python3 flags2_threadpool.py -h
usage: flags2_threadpool.py [-h] [-a] [-e] [-l N] [-m CONCURRENT] [-s LABEL]
[-v]
[CC [CC ...]]
Download flags for country codes. Default: top 20 countries by population.
positional arguments:
CC country code or 1st letter (eg. B for BA...BZ)
optional arguments:
-h, --help show this help message and exit
-a, --all get all available flags (AD to ZW)
-e, --every get flags for every possible code (AA...ZZ)
-l N, --limit N limit to N first codes
-m CONCURRENT, --max_req CONCURRENT
maximum concurrent ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.