pip3 install --upgrade tesserocr got tesserocr.cpp(629): fatal error

On Win7 32bit
C:\Users\i>pip3 install  --upgrade tesserocr
Looking in indexes: https://pypi.tuna.tsinghua.edu.cn/simple
Collecting tesserocr
  Using cached https://pypi.tuna.tsinghua.edu.cn/packages/97/14/2297039bd74baf2c
e970549d4fec383fb6e435d0a48f79813f195834937f/tesserocr-2.4.1.tar.gz
Installing collected packages: tesserocr
  Found existing installation: tesserocr 2.4.0
    Uninstalling tesserocr-2.4.0:
      Successfully uninstalled tesserocr-2.4.0
  Running setup.py install for tesserocr ... error
    Complete output from command c:\users\i\appdata\local\programs\python\python
36-32\python.exe -u -c "import setuptools, tokenize;__file__='C:\\Users\\Public\
\Documents\\iSkysoft\\CreatorTemp\\pip-install-jbdv5ade\\tesserocr\\setup.py';f=
getattr(tokenize, 'open', open)(__file__);code=f.read().replace('\r\n', '\n');f.
close();exec(compile(code, __file__, 'exec'))" install --record C:\Users\Public\
Documents\iSkysoft\CreatorTemp\pip-record-kbtq9hf2\install-record.txt --single-v
ersion-externally-managed --compile:
    Failed to extract tesseract version from executable: [WinError 2] 系统找不到
指定的文件。
    Supporting tesseract v3.04.00
    Building with configs: {'libraries': ['tesseract', 'lept'], 'cython_compile_
time_env': {'TESSERACT_VERSION': 50593792}}
    c:\users\i\appdata\local\programs\python\python36-32\lib\distutils\dist.py:2
61: UserWarning: Unknown distribution option: 'long_description_content_type'
      warnings.warn(msg)
    running install
    running build
    running build_ext
    building 'tesserocr' extension
    creating build
    creating build\temp.win32-3.6
    creating build\temp.win32-3.6\Release
    C:\Program Files\Microsoft Visual Studio 14.0\VC\BIN\cl.exe /c /nologo /Ox /
W3 /GL /DNDEBUG /MD -Ic:\users\i\appdata\local\programs\python\python36-32\inclu
de -Ic:\users\i\appdata\local\programs\python\python36-32\include "-IC:\Program
Files\Microsoft Visual Studio 14.0\VC\INCLUDE" "-IC:\Program Files\Windows Kits\
10\include\10.0.10240.0\ucrt" "-IC:\Program Files\Windows Kits\8.1\include\share
d" "-IC:\Program Files\Windows Kits\8.1\include\um" "-IC:\Program Files\Windows
Kits\8.1\include\winrt" /EHsc /Tptesserocr.cpp /Fobuild\temp.win32-3.6\Release\t
esserocr.obj
    tesserocr.cpp
    tesserocr.cpp(629): fatal error C1083: Cannot open include file: 'leptonica/
allheaders.h': No such file or directory
    error: command 'C:\\Program Files\\Microsoft Visual Studio 14.0\\VC\\BIN\\cl
.exe' failed with exit status 2

    ----------------------------------------
sirfz / tesserocr

pip3 install --upgrade tesserocr got tesserocr.cpp(629): fatal error #201
