极客观点
项目管理
HarmonyOS
我是 python 新手。最近我有一个用python写的项目，它需要一些安装。我运行以下命令进行安装，但出现错误。
# pip install requirements.txt
Collecting requirements.txt
Could not find a version that satisfies the requirement requirements.txt (from versions: )
No matching distribution found for requirements.txt
我在谷歌上搜索并找到了这个链接 http://stackoverflow.com/questions/28167987/python-pip-trouble-installing-from-requirements-txt 但我不太明白那个帖子中的解决方案是什么。
下面是我的 requirements.txt 文件：
# cat requirements.txt
ordereddict==1.1
argparse==1.2.1
python-dateutil==2.2
matplotlib==1.3.1
nose==1.3.0
numpy==1.8.0
pymongo==3.3.0
psutil>=2.0
有没有一种简单的方法可以在这个 python 项目中安装所有必需的依赖项？
编辑1
下面是 pip3 install -r requirements.txt 的输出。
# pip3 install -r requirements.txt
Requirement already satisfied: ordereddict==1.1 in /usr/local/lib/python3.5/dist-packages (from -r requirements.txt (line 1))
Collecting argparse==1.2.1 (from -r requirements.txt (line 2))
Using cached argparse-1.2.1.tar.gz
Collecting python-dateutil==2.2 (from -r requirements.txt (line 3))
Using cached python-dateutil-2.2.tar.gz
Collecting matplotlib==1.3.1 (from -r requirements.txt (line 4))
Using cached matplotlib-1.3.1.tar.gz
Complete output from command python setup.py egg_info:
============================================================================
Edit setup.cfg to change the build options
BUILDING MATPLOTLIB
matplotlib: yes [1.3.1]
python: yes [3.5.2 (default, Nov 17 2016, 17:05:23) [GCC
5.4.0 20160609]]
platform: yes [linux]
REQUIRED DEPENDENCIES AND EXTENSIONS
numpy: yes [version 1.11.3]
dateutil: yes [using dateutil version 2.6.0]
tornado: yes [tornado was not found. It is required for the
WebAgg backend. pip/easy_install may attempt to
install it after matplotlib.]
pyparsing: yes [using pyparsing version 2.1.10]
pycxx: yes [Official versions of PyCXX are not compatible
with Python 3.x. Using local copy]
libagg: yes [pkg-config information for 'libagg' could not
be found. Using local copy.]
freetype: no [The C/C++ header for freetype2 (ft2build.h)
could not be found. You may need to install the
development package.]
png: yes [pkg-config information for 'libpng' could not
be found. Using unknown version.]
OPTIONAL SUBPACKAGES
sample_data: yes [installing]
toolkits: yes [installing]
tests: yes [using nose version 1.3.7]
OPTIONAL BACKEND EXTENSIONS
macosx: no [Mac OS-X only]
qt4agg: no [PyQt4 not found]
gtk3agg: no [gtk3agg backend does not work on Python 3]
gtk3cairo: no [Requires cairo to be installed.]
gtkagg: no [Requires pygtk]
tkagg: no [TKAgg requires Tkinter.]
wxagg: no [requires wxPython]
gtk: no [Requires pygtk]
agg: yes [installing]
cairo: no [cairo not found]
windowing: no [Microsoft Windows only]
OPTIONAL LATEX DEPENDENCIES
dvipng: no
ghostscript: no
latex: no
pdftops: no
============================================================================
* The following required packages can not be built:
* freetype
----------------------------------------
Command "python setup.py egg_info" failed with error code 1 in /tmp/pip-build-don4ne_2/matplotlib/
我已经安装了 libfreetype6-dev 但是 pip 命令仍然报告缺少这个依赖。
# apt-get install libfreetype6-dev
Reading package lists... Done
Building dependency tree
Reading state information... Done
libfreetype6-dev is already the newest version (2.6.1-0.1ubuntu2).
0 upgraded, 0 newly installed, 0 to remove and 4 not upgraded.
原文由 Joey Yi Zhao 发布，翻译遵循 CC BY-SA 4.0 许可协议
python
如果您使用的是 Linux 操作系统：
matplotlib==1.3.1中删除 ---requirements.txtsudo apt-get install python-matplotlibpip install -r requirements.txt（Python 2），或pip3 install -r requirements.txt（Python 3）pip freeze > requirements.txt如果您使用的是 Windows 操作系统：
python -m pip install -U pip setuptoolspython -m pip install matplotlib