argparse | 易学教程

Run python script with some of the argument that are optional

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问题 I have gone through the sys documentation, however there is something that is still unclear to me. I have looked for some similar question on stackoverflow, but I haven't find anything useful (clearly any reference is appreciated!). I want to create a script - say foo.py - in which I want pass from 3 to 6 arguments: $ python foo.py arg1 arg2 arg3 The first 3 arguments must be given in any case; the last 3 arguments are used in a function that have default argument values if nothing is passed.

Argparse and ArgumentDefaultsHelpFormatter. Formatting of default values when sys.stdin/stdout are selected as default

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问题 I am interested in using the ArgumentDefaultsHelpFormatter class formatter of argparse (my program has several sub-commands). By default, the input and output arguments are set to sys.stdin and sys.stdout respectively. However, the formatting for these two arguments may be a little bit confusing for users (e.g (default: ', mode 'r' at 0x10028e0c0>). Is there a way to specifically and easily change the output format for these two arguments to get something like 'default: STDIN' or 'default:

Argparse and ArgumentDefaultsHelpFormatter. Formatting of default values when sys.stdin/stdout are selected as default

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Prevent expansion of wildcards in non-quoted python script argument when running in UNIX environment

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问题 I have a python script that I'd like to supply with an argument (usually) containing wildcards, referring to a series of files that I'd like to do stuff with. Example here: #!/usr/bin/env python import argparse import glob parser = argparse.ArgumentParser() parser.add_argument('-i', action="store", dest="i") results = parser.parse_args() print 'argument i is: ', results.i list_of_matched_files = glob.glob(results.i) In this case, everything works great if the user adds quotes to the passed

How to call parse_args() twice on the same set of arguments in Python's argparse?

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问题 Simplified test case: I have a script that takes two arguments. The first is a list of integers. The second is a single integer that must be contained in the first argument's set of integers. For example: $ python argtest.py --valid_nums 1 2 3 --num 2 Should work, but: $ python argtest.py --valid_nums 1 2 3 --num 4 Should not work, since num is not in valid_nums . However, I have had some difficulty (read: I suspect it is more trouble than it's worth, but I really want it to work)

Python Argparse - Set default value of a parameter to another parameter

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问题 I've added a parameter -c, now I want to add another parameter called -ca. How can I set the default value of -ca as -c? What I want to do is if -ca is not specified, assign -c to -ca. parser.add_argument("-c", type=str) parser.add_argument("-ca", type=str, default=XXX) Thanks. 回答1: Normally, single dash flags are single characters. So -ca is unwise, though not illegal. In normal POSIX practice it could be interpreted as -c a or -c -a . Also argparse allows flagged arguments ( optionals ) to

【经验分享】批量修改文件后缀名，python来帮你

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本例子使用Python的os模块和 argparse模块，将工作目录work_dir下所有后缀名为old_ext的文件修改为后缀名为new_ext 通过本例子，大家将会大概清楚argparse模块的主要用法。 1 导入模块 import argparseimport os 2 定义脚本参数 3 后缀批量重命名 4 实现main函数如果使用Pycharm，直接在configuration界面配置即可，如果使用vs code，可在launch.json文件提前设置好参数： 5 直接调用如果提前设置好了参数，则直接执行 batch_file_rename.py 如果未设置三个参数，需要在命令行这么传入： batch_file_rename.py a py txt 为解决初学者学习上的困难，专门建立的Python学习扣QUN：⑧⑤⑤-④零⑧-⑧⑨③从零基础开始到Python各领域的项目实战教程、开发工具与电子书籍。与你分享企业当下对于python人才需求及学好python的高效技巧，不停更新最新教程！来源： oschina 链接： https://my.oschina.net/u/4380311/blog/4267245

openmv caffe专栏 1

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本专栏参考的原作者文章声明如下。 PS：本专栏对原作者的文章存在适当的修改与补充，使之更适合本作者所阐述的训练要求！如有侵权，请联系13512076879@163.com。 ———————————————— 版权声明：本文为CSDN博主「欣欣以向荣」的原创文章，遵循 CC 4.0 BY-SA 版权协议，转载请附上原文出处链接及本声明。原文链接： https://blog.csdn.net/qq_37783617/article/details/96866163 ———————————————— 1. caffe框架下openmv的训练步骤目前 OPenMV 只提供Caffe模型到network网络的转换，未来可能会支持TensorFlow，但目前不行。通过Caffe框架学习，我们最终的目标肯定是得到 ******.network 的网络库文件训练网络的主要步骤如下：配置环境，安装Caffe 采集数据集训练网络量化模型将模型转换为二进制格式在OPenMV上部署模型运行网络故障排除 2.caffe环境的搭建(以本文环境为例介绍) windows 10 python 2.7 pycharm vs2013 openmv cam h4 openmv ide 3.vs2013 编译caffe 本专题请参考我的另一篇文章： https://www.cnblogs.com

openmv caffe专栏 1

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openmv caffe专栏 1

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