在QGIS自帶的python中安裝第三方庫
如果安裝了QGIS,在所有程序中搜OSGeo4W Shell，以管理員身份打開，可以安裝第三方庫
環境設置
錯誤嘗試：
- 直接安裝，不是QGIS中的python
- 切換路徑，再次嘗試，還是不對
C:\> python3 -m pip install --upgrade pip Requirement already up-to-date: pip in d:\anaconda3\lib\site-packages (20.1.1) C:\>cd /d D:\QGIS 3.12\apps\Python37 D:\QGIS 3.12\apps\Python37> python3 -m pip install --upgrade pip Requirement already up-to-date: pip in d:\anaconda3\lib\site-packages (20.1.1)
正確方法：
D:\QGIS 3.12\apps\Python37>py3_env.bat
D:\QGIS 3.12\apps\Python37>SET PYTHONHOME=D:\QGIS3~1.12\apps\Python37
D:\QGIS 3.12\apps\Python37>SET PYTHONPATH=D:\QGIS3~1.12\apps\Python37;D:\QGIS3~1.12\apps\Python37\Scripts
D:\QGIS 3.12\apps\Python37>PATH D:\QGIS3~1.12\apps\Python37;D:\QGIS3~1.12\apps\Python37\Scripts;D:\QGIS3~1.12\bin;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\system32\WBem
更新一下pip包
D:\QGIS 3.12\apps\Python37> python3 -m pip install --upgrade pip
Collecting pip
Downloading pip-20.1.1-py2.py3-none-any.whl (1.5 MB)
|████████████████████████████████| 1.5 MB 819 kB/s
Installing collected packages: pip
Attempting uninstall: pip
Found existing installation: pip 20.0.2
Uninstalling pip-20.0.2:
Successfully uninstalled pip-20.0.2
Successfully installed pip-20.1.1
查看一下包
D:\QGIS 3.12\apps\Python37>pip list
Package Version
---------------- ----------
certifi 2019.11.28
chardet 3.0.4
coverage 4.5.1
cycler 0.10.0
decorator 4.4.1
ExifRead 2.1.2
future 0.16.0
GDAL 3.0.4
geographiclib 1.50
httplib2 0.11.3
idna 2.8
ipython-genutils 0.2.0
Jinja2 2.11.1
jsonschema 2.6.0
jupyter-core 4.4.0
kiwisolver 1.1.0
lxml 4.3.3
MarkupSafe 1.1.1
matplotlib 3.1.3
mock 2.0.0
nbformat 4.4.0
networkx 2.2
nose2 0.8.0
numpy 1.18.3
OWSLib 0.17.0
pandas 1.0.1
pbr 4.3.0
Pillow 5.3.0
pip 20.1.1
plotly 3.3.0
ply 3.11
psycopg2-binary 2.8.4
Pygments 2.5.2
pyodbc 4.0.24
PyOpenGL 3.1.0
pyparsing 2.4.6
pypiwin32 223
pyproj 2.5.0
PyQt5 5.11.3
pyqt5-tools 5.13.0.1.5
python-dateutil 2.8.1
python-dotenv 0.10.3
pytz 2019.3
pywin32 224
PyYAML 5.3
requests 2.22.0
retrying 1.3.3
scipy 1.4.1
setuptools 45.2.0
Shapely 1.7.0
simplejson 3.16.0
sip 4.19.14
six 1.14.0
traitlets 4.3.3
urllib3 1.25.8
wxPython 4.0.7
xlrd 1.1.0
xlwt 1.3.0
安裝個圖像包
安裝個圖像包scikit-image==0.16.1表示庫名+版本號，可以自行更改成其他的
python3 -m pip install scikit-image==0.16.1 --user
示例：
D:\QGIS 3.12\apps\Python37> python3 -m pip install scikit-image==0.16.1 --user
Collecting scikit-image==0.16.1
Downloading scikit_image-0.16.1-cp37-cp37m-win_amd64.whl (25.7 MB)
|████████████████████████████████| 25.7 MB 392 kB/s
Requirement already satisfied: pillow>=4.3.0 in d:\qgis3~1.12\apps\python37\lib\site-packages (from scikit-image==0.16.1) (5.3.0)
Collecting imageio>=2.3.0
Downloading imageio-2.8.0-py3-none-any.whl (3.3 MB)
|████████████████████████████████| 3.3 MB 3.3 MB/s
Requirement already satisfied: networkx>=2.0 in d:\qgis3~1.12\apps\python37\lib\site-packages (from scikit-image==0.16.1) (2.2)
Requirement already satisfied: matplotlib!=3.0.0,>=2.0.0 in d:\qgis3~1.12\apps\python37\lib\site-packages (from scikit-image==0.16.1) (3.1.3)
Collecting PyWavelets>=0.4.0
Downloading PyWavelets-1.1.1-cp37-cp37m-win_amd64.whl (4.2 MB)
|████████████████████████████████| 4.2 MB 3.3 MB/s
Requirement already satisfied: scipy>=0.19.0 in d:\qgis3~1.12\apps\python37\lib\site-packages (from scikit-image==0.16.1) (1.4.1)
Requirement already satisfied: numpy in d:\qgis3~1.12\apps\python37\lib\site-packages (from imageio>=2.3.0->scikit-image==0.16.1) (1.18.3)
Requirement already satisfied: decorator>=4.3.0 in d:\qgis3~1.12\apps\python37\lib\site-packages (from networkx>=2.0->scikit-image==0.16.1) (4.4.1)
Requirement already satisfied: kiwisolver>=1.0.1 in d:\qgis3~1.12\apps\python37\lib\site-packages (from matplotlib!=3.0.0,>=2.0.0->scikit-image==0.16.1) (1.1.0)
Requirement already satisfied: cycler>=0.10 in d:\qgis3~1.12\apps\python37\lib\site-packages (from matplotlib!=3.0.0,>=2.0.0->scikit-image==0.16.1) (0.10.0)
Requirement already satisfied: pyparsing!=2.0.4,!=2.1.2,!=2.1.6,>=2.0.1 in d:\qgis3~1.12\apps\python37\lib\site-packages (from matplotlib!=3.0.0,>=2.0.0->scikit-image==0.16.1) (2.4.6)
Requirement already satisfied: python-dateutil>=2.1 in d:\qgis3~1.12\apps\python37\lib\site-packages (from matplotlib!=3.0.0,>=2.0.0->scikit-image==0.16.1) (2.8.1)
Requirement already satisfied: setuptools in d:\qgis3~1.12\apps\python37\lib\site-packages (from kiwisolver>=1.0.1->matplotlib!=3.0.0,>=2.0.0->scikit-image==0.16.1) (45.2.0)
Requirement already satisfied: six in d:\qgis3~1.12\apps\python37\lib\site-packages (from cycler>=0.10->matplotlib!=3.0.0,>=2.0.0->scikit-image==0.16.1) (1.14.0)
Installing collected packages: imageio, PyWavelets, scikit-image
WARNING: The scripts imageio_download_bin.exe and imageio_remove_bin.exe are installed in 'C:\Users\67231\AppData\Roaming\Python\Python37\Scripts' which is not on PATH.
Consider adding this directory to PATH or, if you prefer to suppress this warning, use --no-warn-script-location.
WARNING: The script skivi.exe is installed in 'C:\Users\67231\AppData\Roaming\Python\Python37\Scripts' which is not on PATH.
Consider adding this directory to PATH or, if you prefer to suppress this warning, use --no-warn-script-location.
Successfully installed PyWavelets-1.1.1 imageio-2.8.0 scikit-image-0.16.1
進入qgis中的python下測試
import skimage
skimage.__version__
'0.16.1'