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# PyInstaller example
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Table of contents:
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* [Package app](#package-app)
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* [When it succeeds](#when-it-succeeds)
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* [Fatal error](#fatal-error)
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* [Debug app](#debug-app)
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* [More details](#more-details)
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## Package app
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This is an example of using [PyInstaller](http://www.pyinstaller.org/)
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packager to build executable from one of CEF Python's examples
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(wxpython.py). Only Windows platform is currently supported.
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To install required packages type:
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```
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pip install --upgrade pyinstaller pycrypto
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```
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To package example type:
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```
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python pyinstaller.py
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```
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## When it succeeds
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If packaging succeeds you should see "dist/cefapp/" directory open
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in explorer on Windows. In there you will find "cefapp.exe" executable
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that you can launch.
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## Fatal error
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If there is a "Fatal Error!" message box appearing when running app
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then see the next section for how to debug app.
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## Debug app
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In case of a fatal error to debug app pass "--debug" flag when
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packaging app:
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```
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python pyinstaller.py --debug
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```
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After packaging completes on Windows it will open a new CMD window
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and run the cefapp.exe inside it. You should see detailed logs
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in console like these:
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```
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[6708] PyInstaller Bootloader 3.x
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[6708] LOADER: executable is \examples\pyinstaller\dist\cefapp\cefapp.exe
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[6708] LOADER: homepath is \examples\pyinstaller\dist\cefapp
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[6708] LOADER: _MEIPASS2 is NULL
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[6708] LOADER: archivename is \examples\pyinstaller\dist\cefapp\cefapp.exe
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[6708] LOADER: No need to extract files to run; setting extractionpath to homepath
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[6708] LOADER: SetDllDirectory(\examples\pyinstaller\dist\cefapp)
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[6708] LOADER: Already in the child - running user's code.
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[6708] LOADER: Python library: \examples\pyinstaller\dist\cefapp\python27.dll
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[6708] LOADER: Loaded functions from Python library.
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[6708] LOADER: Manipulating environment (sys.path, sys.prefix)
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[6708] LOADER: sys.prefix is C:\github\CEFPYT~2\examples\PYINST~1\dist\cefapp
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[6708] LOADER: Setting runtime options
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[6708] LOADER: Initializing python
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[6708] LOADER: Overriding Python's sys.path
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[6708] LOADER: Post-init sys.path is \examples\pyinstaller\dist\cefapp
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[6708] LOADER: Setting sys.argv
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[6708] LOADER: setting sys._MEIPASS
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[6708] LOADER: importing modules from CArchive
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[6708] LOADER: extracted pyimod00_crypto_key
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[6708] LOADER: callfunction returned...
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[6708] LOADER: extracted struct
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[6708] LOADER: callfunction returned...
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[6708] LOADER: extracted pyimod01_os_path
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[6708] LOADER: callfunction returned...
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[6708] LOADER: extracted pyimod02_archive
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[6708] LOADER: callfunction returned...
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[6708] LOADER: extracted pyimod03_importers
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[6708] LOADER: callfunction returned...
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[6708] LOADER: Installing PYZ archive with Python modules.
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[6708] LOADER: PYZ archive: out00-PYZ.pyz
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[6708] LOADER: Running pyiboot01_bootstrap.py
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[6708] LOADER: Running wxpython.py
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Traceback (most recent call last):
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File "wxpython.py", line 11, in <module>
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File "c:\python27\lib\site-packages\PyInstaller-3.3-py2.7.egg\
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PyInstaller\loader\pyimod03_importers.py", line 396,
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in load_module exec(bytecode, module.__dict__)
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File "site-packages\cefpython3\__init__.py", line 50, in <module>
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File "c:\python27\lib\site-packages\PyInstaller-3.3-py2.7.egg\
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PyInstaller\loader\pyimod03_importers.py", line 687,
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in load_module module = imp.load_module(fullname, fp, filename,
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ext_tuple)
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File "cefpython_py27.pyx", line 283, in init cefpython_py27
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(cefpython_py27.cpp:110881)
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ImportError: No module named json
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[6708] Failed to execute script wxpython
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[6708] LOADER: OK.
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[6708] LOADER: Cleaning up Python interpreter.
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```
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## More details
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The corresponding issue in the tracker is [Issue #135](https://github.com/cztomczak/cefpython/issues/135).
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See also the [Build executable](https://github.com/cztomczak/cefpython/blob/master/docs/Tutorial.md#build-executable)
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section in Tutorial.
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