StartingPython

last edited 7 years ago by telion

Python Startup process

Executable is invoked via:

1. Shortcut to the executable itself
2. Shortcut to a Python script
3. Shortcut to a batch file (HPC only?)
4. From StartMenu?/Run (HPC only?)
5. From CMD.EXE console (HPC only)
6. From other programs

Possible causes of problem at this stage and the solutions are:

• Wrong link in shortcut file.

  Edit the shortcut file (mostly in \Windows\Start Menu) or Delete that shortcut and recreate new one using Explorer.

• Wrong RegistrySettings? for .py or .pyc extension.

  Use a tool like SmallTweak? of PocketTweak? to verify and corret them.

  • For HPC http://tillanosoft.com/ce/stweak.html
  • For PPC http://tillanosoft.com/ce/ptweak.html
• Missing dll and/or wrong OS version/platform

  When you get an error saying "One or more components missing", or error 126 (module not found), etc., usually it means Windows CE could not find necessary .dll or .pyd files.

  • It may caused by putting Python's dll files in somewhere other than SystemPath? setting.

    Windows CE will find necessary dll if it is in the same directory as EXE file, \Windows directory, or anywhere specified by Systempath Key in the registry.

    Try to consolidate all Python's components in one directory (easiest), or use systempath utility made by "homin" to set dll(pyd) search path.

    http://www.geocities.co.jp/SiliconValley-Cupertino/2039/systempath.lzh

  • Maybe you deleted accidently one of Python's dll.

    Reinstall if this is suspected.

  • Maybe you are trying to use PPC version on HPC.

    Download and use appropriate distribution.

  • Some CE devices are customized by its manufacture. And it may not contain all dlls.

    We may not be able to provide a solution in this case.

    Check if substituting dll is available somewhere.

    To use PPC version of PythonCE, you need at least aygshell.dll.

    HPC version of PythonCE requires less components than PPC version.

• Wrong PATH setting or current directory in batch file.

  Verifiy and correct batch file.

site.py is loaded from

1. Same directory as PythonExecutable? file.
2. Python's Lib direcotry.
3. root directory
4. Somewhere else ( When python is embedded or called by other programs)

Sympton and remedies:

• On HPC, CMD console opens up and complains "import site failed"

  Either site.py is not found, or it has syntax error or runtime error. Verify if site.py is loaded, if it cause some sort of error, and correct them.

• On HPC, DebugDialog? opens up and tells you traceback cant be loaded.

  Most probably, sys.path setting is wrong...as a consequence of missing or bad site.py. So, verify site.py.

pcceshell.py is loaded from

1. Anywhere specified by sys.path
2. Same directory as PythonExecutable?

Symptons and fix

• Python's InterpreterConsole? does not come up

  Check sys.path setting in site.py.
  If your distribution contains only site.pyc, rename and keep the site.pyc and download site.py here to test with it.

  site.py.mbcs_and_getcwd

• DebugDialog? comes up and tell you some error in pcceshell.py

  There is an error in pcceshell.py. Correct it if you can.
  If you don't know what is causing that error, download and try with new pcceshell.py.

  PPC: pcceshell.py.ppc_with_input.txt

Any question and/or suggestion ?

Please use the form bellow.

(If Add comment does not work, please send E-mail to PythonCEMailingList: mailto:pythonce@python.org )