用pip install升级已安装的附加包, 以tabulate包为例
去pypi官网查看tabulate包的介绍, 发现tabulate 0.7.6才开始支持宽字符的美化打印.
而且还需要安装它的附加包: widechars
然而我的机器里的tabulate的版本是0.7.5.
下面是升级步骤以及log记录:
pip install --upgrade tabulate
pip install tabulate[widechars]
C:Documents and SettingsAdministrator>pip help install
Usage:
pip install [options] <requirement specifier> [package-index-options] ...
pip install [options] -r <requirements file> [package-index-options] ...
pip install [options] [-e] <vcs project url> ...
pip install [options] [-e] <local project path> ...
pip install [options] <archive url/path> ...
Description:
Install packages from:
- PyPI (and other indexes) using requirement specifiers.
- VCS project urls.
- Local project directories.
- Local or remote source archives.
pip also supports installing from "requirements files", which provide
an easy way to specify a whole environment to be installed.
Install Options:
-c, --constraint <file> Constrain versions using the given constraints
file. This option can be used multiple times.
-e, --editable <path/url> Install a project in editable mode (i.e.
setuptools "develop mode") from a local project
path or a VCS url.
-r, --requirement <file> Install from the given requirements file. This
option can be used multiple times.
-b, --build <dir> Directory to unpack packages into and build in.
-t, --target <dir> Install packages into <dir>. By default this
will not replace existing files/folders in
<dir>. Use --upgrade to replace existing
packages in <dir> with new versions.
-d, --download <dir> Download packages into <dir> instead of
installing them, regardless of what's already
installed.
--src <dir> Directory to check out editable projects into.
The default in a virtualenv is "<venv
path>/src". The default for global installs is
"<current dir>/src".
-U, --upgrade Upgrade all specified packages to the newest
available version. The handling of dependencies
depends on the upgrade-strategy used.
C:Documents and SettingsAdministrator>pip install --upgrade tabulate
Collecting tabulate
Downloading tabulate-0.7.7-py2.py3-none-any.whl
Installing collected packages: tabulate
Found existing installation: tabulate 0.7.5
Uninstalling tabulate-0.7.5:
Successfully uninstalled tabulate-0.7.5
Successfully installed tabulate-0.7.7
C:Documents and SettingsAdministrator>pip install tabulate[widechars]
Requirement already satisfied: tabulate[widechars] in d:anaconda2libsite-packages
Collecting wcwidth; extra == "widechars" (from tabulate[widechars])
Using cached wcwidth-0.1.7-py2.py3-none-any.whl
Installing collected packages: wcwidth
Successfully installed wcwidth-0.1.7