如何在 python 3 控制台中打印出导入库的成员函数?
How to print out member functions of a imported library in a python 3 console?
注意:示例输出是 ipython(增强的 python 编程控制台)功能,而不是 python 3 标准 (@DTing)。使用默认控制台时,可以通过dir(libname)
命令获取成员函数列表(@Matthew Runchey)。
在 python 2.7 控制台中,可以使用命令 libname.
打印出导入库 libname
的成员函数。
预期的输出应该是这样的:
>>> import hashlib
>>> hashlib.
hashlib.algorithms hashlib.new hashlib.sha224 hashlib.sha384
hashlib.md5 hashlib.sha1 hashlib.sha256 hashlib.sha512
(示例取自本视频中的 0:13 左右:https://youtu.be/dG3tOsGEYP4 )
但是,我的 python 3.4 控制台 (Win7 x64) 出现语法错误。
>>> import hashlib
>>> hashlib.
File "<stdin>", line 1
hashlib.
^
SyntaxError: invalid syntax
那么在 python 3 中做同样事情的正确方法是什么?
这不是 python 的功能,而是 ipython 选项卡完成功能。
见下文:
$ python
Python 2.7.9 (default, Apr 7 2015, 07:58:25)
[GCC 4.2.1 Compatible Apple LLVM 6.0 (clang-600.0.57)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import hashlib
>>> hashlib.
File "<stdin>", line 1
hashlib.
^
SyntaxError: invalid syntax
>>>
点击 .
之后的标签:
$ ipython
Python 2.7.9 (default, Apr 7 2015, 07:58:25)
Type "copyright", "credits" or "license" for more information.
IPython 3.1.0 -- An enhanced Interactive Python.
? -> Introduction and overview of IPython's features.
%quickref -> Quick reference.
help -> Python's own help system.
object? -> Details about 'object', use 'object??' for extra details.
In [1]: import hashlib
In [2]: hashlib.
hashlib.algorithms hashlib.md5 hashlib.sha1 hashlib.sha384
hashlib.algorithms_available hashlib.new hashlib.sha224 hashlib.sha512
hashlib.algorithms_guaranteed hashlib.pbkdf2_hmac hashlib.sha256
也适用于 python3:
$ ipython
Python 3.4.3 (default, Apr 7 2015, 08:05:21)
Type "copyright", "credits" or "license" for more information.
IPython 3.1.0 -- An enhanced Interactive Python.
? -> Introduction and overview of IPython's features.
%quickref -> Quick reference.
help -> Python's own help system.
object? -> Details about 'object', use 'object??' for extra details.
In [1]: import hashlib
In [2]: hashlib.
hashlib.algorithms_available hashlib.new hashlib.sha224 hashlib.sha512
hashlib.algorithms_guaranteed hashlib.pbkdf2_hmac hashlib.sha256
hashlib.md5 hashlib.sha1 hashlib.sha384
如果您使用的是 ipython,这可能是一个相关问题 IPython tab completion not working
dir(module_name)
这将打印您导入的任何函数的列表。
>>>import hashlib
>>>dir(hashlib)
['__all__', '__builtin_constructor_cache', '__builtins__', '__cached__', '__doc__', '__file__', '__get_builtin_constructor', '__loader__', '__name__', '__package__', '__spec__', '_hashlib', 'algorithms_available', 'algorithms_guaranteed', 'md5', 'new', 'pbkdf2_hmac', 'sha1', 'sha224', 'sha256', 'sha384', 'sha512']
注意:示例输出是 ipython(增强的 python 编程控制台)功能,而不是 python 3 标准 (@DTing)。使用默认控制台时,可以通过dir(libname)
命令获取成员函数列表(@Matthew Runchey)。
在 python 2.7 控制台中,可以使用命令 libname.
打印出导入库 libname
的成员函数。
预期的输出应该是这样的:
>>> import hashlib
>>> hashlib.
hashlib.algorithms hashlib.new hashlib.sha224 hashlib.sha384
hashlib.md5 hashlib.sha1 hashlib.sha256 hashlib.sha512
(示例取自本视频中的 0:13 左右:https://youtu.be/dG3tOsGEYP4 )
但是,我的 python 3.4 控制台 (Win7 x64) 出现语法错误。
>>> import hashlib
>>> hashlib.
File "<stdin>", line 1
hashlib.
^
SyntaxError: invalid syntax
那么在 python 3 中做同样事情的正确方法是什么?
这不是 python 的功能,而是 ipython 选项卡完成功能。
见下文:
$ python
Python 2.7.9 (default, Apr 7 2015, 07:58:25)
[GCC 4.2.1 Compatible Apple LLVM 6.0 (clang-600.0.57)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import hashlib
>>> hashlib.
File "<stdin>", line 1
hashlib.
^
SyntaxError: invalid syntax
>>>
点击 .
之后的标签:
$ ipython
Python 2.7.9 (default, Apr 7 2015, 07:58:25)
Type "copyright", "credits" or "license" for more information.
IPython 3.1.0 -- An enhanced Interactive Python.
? -> Introduction and overview of IPython's features.
%quickref -> Quick reference.
help -> Python's own help system.
object? -> Details about 'object', use 'object??' for extra details.
In [1]: import hashlib
In [2]: hashlib.
hashlib.algorithms hashlib.md5 hashlib.sha1 hashlib.sha384
hashlib.algorithms_available hashlib.new hashlib.sha224 hashlib.sha512
hashlib.algorithms_guaranteed hashlib.pbkdf2_hmac hashlib.sha256
也适用于 python3:
$ ipython
Python 3.4.3 (default, Apr 7 2015, 08:05:21)
Type "copyright", "credits" or "license" for more information.
IPython 3.1.0 -- An enhanced Interactive Python.
? -> Introduction and overview of IPython's features.
%quickref -> Quick reference.
help -> Python's own help system.
object? -> Details about 'object', use 'object??' for extra details.
In [1]: import hashlib
In [2]: hashlib.
hashlib.algorithms_available hashlib.new hashlib.sha224 hashlib.sha512
hashlib.algorithms_guaranteed hashlib.pbkdf2_hmac hashlib.sha256
hashlib.md5 hashlib.sha1 hashlib.sha384
如果您使用的是 ipython,这可能是一个相关问题 IPython tab completion not working
dir(module_name)
这将打印您导入的任何函数的列表。
>>>import hashlib
>>>dir(hashlib)
['__all__', '__builtin_constructor_cache', '__builtins__', '__cached__', '__doc__', '__file__', '__get_builtin_constructor', '__loader__', '__name__', '__package__', '__spec__', '_hashlib', 'algorithms_available', 'algorithms_guaranteed', 'md5', 'new', 'pbkdf2_hmac', 'sha1', 'sha224', 'sha256', 'sha384', 'sha512']