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python在ruby中的uuu文件的等价物是什么?

module path ruby python

1

miku · 技术社区 · 15 年前

在导入后的python中,可以看到已加载的文件/模块的来源。

>>> import os
>>> os.__file__
'/Users/tm/lib/python2.6/os.pyc'

>> require 'xmlrpc/client'
=> true
>> ...

3 回复 | 直到 15 年前

1

Jörg W Mittag 15 年前

没有完全相同的。

所有已删除的文件 required 列在 $LOADED_FEATURES require d。所以,如果你想知道一个文件是从哪里来的 要求 d、你只需要看看结尾:

$LOADED_FEATURES.last if require 'yaml'
# => 'C:/Program Files/Ruby/lib/ruby/1.9.1/yaml.rb'

很难找出哪个条目对应哪个调用。另外,如果文件已经在 ,则不会再次加载:

require 'yaml'
# => true
# true means: the file was loaded

$LOADED_FEATURES.last
# => 'C:/Program Files/Ruby/lib/ruby/1.9.1/yaml.rb'

require 'json'
$LOADED_FEATURES.last
# => 'C:/Program Files/Ruby/lib/ruby/1.9.1/json.rb'

require 'yaml'
# => false
# false means: the file wasn't loaded again, because it has already been loaded

$LOADED_FEATURES.last
# => 'C:/Program Files/Ruby/lib/ruby/1.9.1/json.rb'
# Last loaded feature is still JSON, because YAML wasn't actually loaded twice

要求 要求 . 以我为例, require 'yaml' 不仅仅是负载 yaml.rb

C:/Program Files/Ruby/lib/ruby/1.9.1/i386-mingw32/stringio.so
C:/Program Files/Ruby/lib/ruby/1.9.1/i386-mingw32/syck.so
C:/Program Files/Ruby/lib/ruby/1.9.1/syck/error.rb
C:/Program Files/Ruby/lib/ruby/1.9.1/syck/basenode.rb
C:/Program Files/Ruby/lib/ruby/1.9.1/syck/syck.rb
C:/Program Files/Ruby/lib/ruby/1.9.1/syck/tag.rb
C:/Program Files/Ruby/lib/ruby/1.9.1/syck/stream.rb
C:/Program Files/Ruby/lib/ruby/1.9.1/syck/constants.rb
C:/Program Files/Ruby/lib/ruby/1.9.1/date/format.rb
C:/Program Files/Ruby/lib/ruby/1.9.1/date.rb
C:/Program Files/Ruby/lib/ruby/1.9.1/syck/rubytypes.rb
C:/Program Files/Ruby/lib/ruby/1.9.1/syck/types.rb
C:/Program Files/Ruby/lib/ruby/1.9.1/yaml/syck.rb
C:/Program Files/Ruby/lib/ruby/1.9.1/syck.rb
C:/Program Files/Ruby/lib/ruby/1.9.1/yaml.rb

2

1

BaroqueBobcat 15 年前

假设您使用的是rubygems,您可以通过使用 Gem.find_files(file) .

例如。:

>> puts Gem.find_files('active_record')
/Library/Ruby/Gems/1.8/gems/activerecord-3.0.0.beta2/lib/active_record.rb
/Library/Ruby/Gems/1.8/gems/activerecord-2.3.8/lib/active_record.rb
/Library/Ruby/Gems/1.8/gems/activerecord-2.3.5/lib/active_record.rb
/Library/Ruby/Gems/1.8/gems/activerecord-2.3.4/lib/active_record.rb
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/gems/1.8/gems/activerecord-2.2.2/lib/active_record.rb
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/gems/1.8/gems/activerecord-1.15.6/lib/active_record.rb

数组的第一个元素是 require 'active_record' .

$ gem which foo 从命令行。

3

1

John Feminella 15 年前

没有完全匹配的。不过,你自己很容易找到:

# Find where a path `p` was loaded from.
def locate(p)
  # Find the first path in your load-paths that contains a file matching `p`.
  $:.find { |l|
    File.exists?(File.join(l, p))
  }
end

ruby-1.9.1-p378 > locate('yaml')
 => "/home/johnf/.rvm/rubies/ruby-1.9.1-p378/lib/ruby/1.9.1" 
# --> This tells you that 'yaml.rb' was loaded from here.

ruby-1.9.1-p378 > locate('zzz')
 => nil
# --> There's no matches for this library.

ruby-1.9.1-p378 > locate('haml')
 => "/home/johnf/.rvm/gems/ruby-1.9.1-p378@standard/gems/haml-3.0.12/bin" 
# --> Here's a third-party library from my gems.