OSError WinError 193 1 is not a valid Win32 application

Question

I am trying to call a python file  hello py  from within the python interpreter with subprocess  But I am unable to resolve this error   Python 3 4 1     import subprocess     subprocess call   hello py    htmlfilename htm    Traceback  most recent call last     File   lt pyshell 42 gt    line 1  in  lt module gt      subprocess call   hello py    htmlfilename htm      File  C  Python34 lib subprocess py   line 537  in call     with Popen  popenargs    kwargs  as p    File  C  Python34 lib subprocess py   line 858  in   init       restore signals  start new session    File  C  Python34 lib subprocess py   line 1111  in  execute child     startupinfo  OSError   WinError 193   1 is not a valid Win32 application   Also is there any alternate way to  call a python script with arguments  other than using subprocess  Thanks in advance

User · Answer

For me issue got resolved after following steps :

Installing python 32 bit version on windows.
Add newly installed python and it's script folder(where pip resides in environment variable)

Issue comes when any application you want to run needs python 32 bit variants and you have 64 bit variant

Note : Once you install python 32 bit variant,dont forget to install all required packages using pip of this new python 32 bit variant

User · Answer

All above solution are logical and I think covers the root cause  but for me  none of the above worked  Hence putting it here as may be helpful for others      My environment was messed up  As you can see from the traceback  there are two python environments involved here     C  Users example AppData Roaming Python Python37 C  Users example Anaconda3   I cleaned up the path and just deleted all the files from C  Users example AppData Roaming Python Python37   Then it worked like the charm   I hope others may find this helpful   This link helped me to found the solution

User · Answer

I solved this by Following steps   Uninstalled python removed Python37 Folder from C program files  and user sukhendra AppData removed all python37 paths  then only Anaconda is remaining in my PC so opened Anaconda and then it s all working fine for me

User · Answer

Python installers usually register  py files with the system  If you run the shell explicitly  it works   import subprocess subprocess call   hello py    htmlfilename htm    shell True    --- or ---- subprocess call  hello py htmlfilename htm   shell True    You can check your file associations on the command line with  C   gt assoc  py  py Python File  C   gt ftype Python File Python File  C  Python27 python exe    1

User · Answer

I got the same error while I forgot to use shell True in the subprocess call  subprocess call  python modify depth images py   shell True   Running External Command  To run an external command without interacting with it  such as one would do with os system    Use the call   function  import subprocess  Simple command subprocess call   ls    -1    shell True

User · Answer

OSError   WinError 193   1 is not a valid Win32 application  This error is most probably due to this line import subprocess   I had the same issue and had solved it by uninstalling and reinstalling python and anaconda then i used jupyter and wrote pip install numpy this gave me the whole path where it was getting my site-packages from i deleted my site-packages folder and then the error dissappeared  Actually because i had 2 folders for site-packages one with anaconda and other somewhere in app data which had some issues in it   since i deleted that site-package folder then it automatically started taking my libraries from site-package folder which was with anaconda hence the problem was solved

User · Answer

The error is pretty clear  The file hello py is not an executable file  You need to specify the executable   subprocess call   python exe    hello py    htmlfilename htm      You ll need python exe to be visible on the search path  or you could pass the full path to the executable file that is running the calling script   import sys subprocess call  sys executable   hello py    htmlfilename htm

User · Answer

For anyone experiencing this on windows after an update What happened was that Windows Defender made some changes  Possibly cause running data extraction scripts  but python exe got reduced to 0kb for that project  Copying the python exe from another project and replacing it solved for now

User · Answer

The file hello py is not an executable file  You need to specify a file like python exe try following  import sys subprocess call  sys executable   hello py    htmlfilename htm

User · Answer

I too faced same issue and following steps in resolution of this   I removed unnecessary python path from system except anaconda path  C  Users lt user-Name gt  AppData Roaming lt python gt    remove any unnecessary python files  folder  these files may interfere with current execution   Regards Vj

User · Answer

Uninstalling numpy from command line   terminal through pip fixed the error for me   pip uninstall numpy

[python] OSError: [WinError 193] %1 is not a valid Win32 application

For me issue got resolved after following steps :

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