小编kev*_*kev的帖子

我尝试运行AWS CLI时遇到以下错误.我已经尝试安装六个,但它仍然无法正常工作.

有人可以告诉我什么是错的吗？

我之前从未设法在此计算机上运行AWS CLI.

Traceback (most recent call last):
  File "/usr/local/bin/aws", line 23, in <module>
    sys.exit(main())
  File "/usr/local/bin/aws", line 19, in main
    return awscli.clidriver.main()
  File "/usr/local/lib/python3.3/site-packages/awscli/clidriver.py", line 49, in main
    driver = create_clidriver()
  File "/usr/local/lib/python3.3/site-packages/awscli/clidriver.py", line 58, in create_clidriver
    event_hooks=emitter)
  File "/usr/local/lib/python3.3/site-packages/awscli/plugin.py", line 44, in load_plugins
    modules = _import_plugins(plugin_mapping)
  File "/usr/local/lib/python3.3/site-packages/awscli/plugin.py", line 61, in _import_plugins
    module = __import__(path, fromlist=[module])
  File "/usr/local/lib/python3.3/site-packages/awscli/handlers.py", line 61, in <module>
    from awscli.customizations.opsworks import initialize as opsworks_init
  File "/usr/local/lib/python3.3/site-packages/awscli/customizations/opsworks.py", line 24, in <module>
    from six.moves …

我的GEMFILE中有以下内容:

group :development do 
  gem 'rspec-rails'
  gem 'annotate-models'
end 

group :test do 
  gem 'rspec'
  gem 'webrat'
  gem 'spork'
  gem 'factory_girl_rails'
end 

'rspec'和'rspec-rails'之间有什么区别？

我查看了文档,但是没有找到任何让我知道我通过cursor.execute("...")执行的最后一个命令是否成功的信息.

我期待一个像"1行受影响"的回复.

我在我的源代码中包含了 openssl/md5.h。

#include <openssl/md5.h>

这是我的（部分）我的代码：

char *pf_generate_pfdhr_string(int firstfree, int numpages)
{
    const int md5_digest_len = 16;
    char hash[md5_digest_len];

    MD5_CTX md5_ctx;
    MD5_Init(&md5_ctx);
    int hdr_arr[2] = {firstfree, numpages};
    MD5_Update(&md5_ctx, hdr_arr, 2*sizeof(int));
    MD5_Final(hash, &md5_ctx);

    return hash;
}

这是我的输出

ranlib build/libpf.a
cc -g -O2 -Wall -Wextra -Isrc -rdynamic     tests/pf_tests.c build/libpf.a   -o tests/pf_tests
Undefined symbols for architecture x86_64:
  "_MD5_Final", referenced from:
      _pf_generate_pfdhr_string in libpf.a(pf.o)
  "_MD5_Init", referenced from:
      _pf_generate_pfdhr_string in libpf.a(pf.o)
  "_MD5_Update", referenced from:
      _pf_generate_pfdhr_string in libpf.a(pf.o)
ld: symbol(s) not found for architecture x86_64
clang: error: …

我希望在状态栏下方设置一条消息，并可能更改消息的颜色（参见照片 - 我希望在“睡眠周期”所在的位置设置一条消息）。

但是，我查看了 iOS 的 Human Design Guidelines，但无法确定此控件的名称。

https://developer.apple.com/ios/human-interface-guidelines/ui-bars/navigation-bars/

只要在正确的方向上指出一点就会有很大帮助。