I'm new to Python and I'm having some problems trying to make PLY works. For now, all I want is to successfully run the example from the PLY homepage.
At first I tried to just download PLY-3.8, put the ply folder in the same directory I saved the example (calc.py) and ran it. The calc.py file is at the C:\Users\...\Python directory and the ply folder is the C:\Users\...\Python\ply, just to make it clearer. But I got an ImportError: No module named 'ply'.
Then I searched for a while, tried to update something called distutils and install the modules through the Windows PowerShell and so on and so forth, but none of that worked and I just reset the whole thing (reinstalling Python and all of that). But then I finally got it to work by simply inserting into the sys.path the directory path where the script I was running (edit: in interactive mode) was, by doing this:
import sys
sys.path.insert(0,'C:\\Users\\ ... \\Python')
This fixed the ImportError but, and this is where I am now, there are a bunch of other errors:
Traceback (most recent call last):
File "C:\Users\...\Python\calc.py", line 48, in <module>
lexer = lex.lex()
File "C:\Users\...\Python\ply\lex.py", line 906, in lex
if linfo.validate_all():
File "C:\Users\...\Python\ply\lex.py", line 580, in validate_all
self.validate_rules()
File "C:\Users\...\Python\ply\lex.py", line 822, in validate_rules
self.validate_module(module)
File "C:\Users\...\Python\ply\lex.py", line 833, in validate_module
lines, linen = inspect.getsourcelines(module)
File "c:\users\...\python\python35\lib\inspect.py", line 930, in getsourcelines
lines, lnum = findsource(object)
File "c:\users\...\python\python35\lib\inspect.py", line 743, in findsource
file = getsourcefile(object)
File "c:\users\...\python\python35\lib\inspect.py", line 659, in getsourcefile
filename = getfile(object)
File "c:\users\...\python\python35\lib\inspect.py", line 606, in getfile
raise TypeError('{!r} is a built-in module'.format(object))
TypeError: <module '__main__'> is a built-in module
Now I have absolutely no idea what to do. I tried to search for a solution but had no luck. I appreciate if anyone can help me out.
I'm on Windows 10, using Python 3.5.0 and iep as my IDE (www.iep-project.org) if these informations are of any importance.
In short: I just want to successfully run the example from the PLY homepage and then I think I can figure out the rest.
EDIT: I found out that if I do:
import inspect
inspect.getfile(__main__)
I get the exact same (last) error from before:
Traceback (most recent call last):
File "<console>", line 1, in <module>
File "c:\users\...\python\python35\lib\inspect.py", line 606, in getfile
raise TypeError('{!r} is a built-in module'.format(object))
TypeError: <module '__main__'> is a built-in module
I think this is the culprit, but I still don't know how to fix it.
EDIT 2: I got it to work and answered the question explaining how, but if someone have a more complete answer, I would love to hear it.
To anyone having this problem, I found what was the issue. I still don't know why exactly is like that, so if anyone have a more complete answer to provide I would appreciate (I'm still a newbie at Python).
Anyway, it seems this code can't be executed in Interactive mode, it needs to be executed as a script. To do that on IEP it's Run > Run file as script or Ctrl+Shift+E. On IDLE you need to Open... the file (Ctrl+O) and then Run Module (F5).
As to why it can't be executed in Interactive mode, here's a little bit about the difference between interactive mode and running as script from the IEP wizard:
Interactive mode vs running as script
You can run the current file or the main file normally, or as a script. When run as script, the shell is restared (sic) to provide a clean environment. The shell is also initialized differently so that it closely resembles a normal script execution.
In interactive mode, sys.path[0] is an empty string (i.e. the current dir), and sys.argv is set to [''].
In script mode, __file__ and sys.argv[0] are set to the scripts filename, sys.path[0] and the working dir are set to the directory containing the script.
That explains a bit about why the inspect.getfile(__main__) was throwing an error: the __main__ had no attribute __file__. And also why I had to insert the current directory into sys.path: sys.path didn't had the current directory in interactive mode.
I hope this helps someone.
Related
my issue is that i've been trying to make an exe file with a .py that I created, but it doesn't work. I executed the converted .exe file from the console to see the log and I got this:
Traceback (most recent call last):
File "professors.py", line 10, in <module>
File "PyInstaller\loader\pyimod03_importers.py", line 531, in exec_module
File "docx2pdf\__init__.py", line 13, in <module>
File "importlib\metadata.py", line 551, in version
File "importlib\metadata.py", line 524, in distribution
File "importlib\metadata.py", line 187, in from_name
importlib.metadata.PackageNotFoundError: docx2pdf
[6940] Failed to execute script professors
I've been reading about the issue and it seems that pyinstaller doesn't recognize the docx2pdf import. I read in a website that I have to add it in a folder called site-packages, but it is supposed to have another folder inside called pyInstaller, which is not there. I also tried adding the folder manually but it still didn't work. I also tried with the --hidden-imports method but im not sure how to exactly use it.
I will have to apply this to other imports that I have also.
Any ideas? Thanks in advance!
I had a identical issue. I removed lines 7-13 from the docx2pdf module:
try:
# 3.8+
from importlib.metadata import version
except ImportError:
from importlib_metadata import version
__version__ = version(__package__)
and line 119...
print(__version__)
After that, it worked. Modifying the module probably isn't the best solution, and of course I'd recommend backing up the module before modifying it, but I hope it works for you too.
I am writing a simple network scanner with python using scapy following is my code :
import scapy.all as scapy
def scan(ip):
scapy.arping(ip)
scan("192.168.1.1/24")
Error I am getting :
Traceback (most recent call last):
File "ipScanner.py", line 10, in <module>
scan("192.168.1.1/24")
File "ipScanner.py", line 8, in scan
scapy.arping(ip)
File "/Users/omairkhan/opt/anaconda3/lib/python3.7/site-packages/scapy/layers/l2.py", line 648, in arping
filter="arp and arp[7] = 2", timeout=timeout, iface_hint=net, **kargs) # noqa: E501
File "/Users/omairkhan/opt/anaconda3/lib/python3.7/site-packages/scapy/sendrecv.py", line 553, in srp
filter=filter, nofilter=nofilter, type=type)
File "/Users/omairkhan/opt/anaconda3/lib/python3.7/site-packages/scapy/arch/bpf/supersocket.py", line 242, in __init__
super(L2bpfListenSocket, self).__init__(*args, **kwargs)
File "/Users/omairkhan/opt/anaconda3/lib/python3.7/site-packages/scapy/arch/bpf/supersocket.py", line 62, in __init__
(self.ins, self.dev_bpf) = get_dev_bpf()
File "/Users/omairkhan/opt/anaconda3/lib/python3.7/site-packages/scapy/arch/bpf/core.py", line 114, in get_dev_bpf
raise Scapy_Exception("No /dev/bpf handle is available !")
scapy.error.Scapy_Exception: No /dev/bpf handle is available !
Exception ignored in: <function _L2bpfSocket.__del__ at 0x105984c20>
Traceback (most recent call last):
File "/Users/omairkhan/opt/anaconda3/lib/python3.7/site-packages/scapy/arch/bpf/supersocket.py", line 139, in __del__
self.close()
File "/Users/omairkhan/opt/anaconda3/lib/python3.7/site-packages/scapy/arch/bpf/supersocket.py", line 211, in close
if not self.closed and self.ins is not None:
AttributeError: 'L2bpfSocket' object has no attribute 'ins'
Can anyone please help understand it.
NOTE: I am running it on mac OS.
I wrote this exact program when I first started programming with matching syntax, and it ran correctly on my systems when run as administrator. I develop on Linux and Windows rather than Mac, but I will offer what I can.
Are you running this script through your IDE or calling it from the shell?
I recommend only running it from the shell. This simply gives you more control over the files like specifying which version of python the script is, and if you need administrative privileges for a script, you can elevate the script permissions in the shell.
Also, in my OS, I was taught to always use, and have experienced the mistakes of forgetting this, always add:
#!/usr/bin/env python
as the first line of every script. At least in Linux, it tells the PC how to treat the file (it tells it to treat the file as a python file--yes I acknowledge that its already running it as python). I would check to see if that is valid for MacOS file system.
Most of what I have recommended so far comes down to no /dev/bpf handle is available, only ever being an issue for me when I'm not running script as an administrator (although Linux states permission denied). And I shouldn't leave out that using Anaconda on Windows in the past (before I understood the structure of my file systems) prevented me from using common modules like pygame and scapy. I could only guess in that case Anaconda prevented the PC from knowing where to find every piece of that module by making the computer think it had its own one of that module under Anaconda directory when it was in a different PATH.
I am new to python and I found a very intesting library I need to play with which is only written in python
here us part of my code
from pkgutil import get_data
grammar = get_data(__name__, "thl.lark").decode("utf-8")
Now when I run it I get
Traceback (most recent call last):
File "/Users/xxx/thl/thl-jupyter-2020/thl/test.py", line 6, in <module>
grammar = get_data(__name__, "thl.lark").decode("utf-8")
File "/xxx/.pyenv/versions/3.9.0/lib/python3.9/pkgutil.py", line 620, in get_data
spec = importlib.util.find_spec(package)
File "/xxx/.pyenv/versions/3.9.0/lib/python3.9/importlib/util.py", line 114, in find_spec
raise ValueError('{}.__spec__ is None'.format(name))
ValueError: __main__.__spec__ is None
Any idea what is going on?
If you run your script with -m flag provided it will work.
It means that your script will be executed as a module rather than a standalone script. I can assume that pkgutil requires a module to work.
python -m your_script.py
There's a great blog post about python modules and the difference between standalone scripts.
Start with solving line 6 and peel off parts you are unsure of, then adding them piece by piece.
pkgutil.get_data is a function for retrieving resource files from packages.
Your test.py is not a package. It makes no sense to try to use pkgutil.get_data with it, as your file is an ordinary module, not a package, and it cannot contain any resource files.
When I run my py program it works the way I intended it to. If I am on a Linux box and build an executable using Pyinstaller, it builds without issue and executes without issue. I have scoured the Pyinstaller docs, git, etc. none of the posted fixes helped
I am still very new at python and feel like it might be a simple fix and might be over thinking the issue
Why can I no build a functional .exe on a windows based system using pyinstaller?
Windows 10 system
Pyinstaller version 3.2
Python version 3.5.2
This is a GUI program using appJar which is also up to date.
The file does build, but errors "Could not execute script"
EDIT
Not sure if this is best to edit in line like this but...
So studying the output and making adjustments, the issue seems to be appJar.py. For some reason it is missing assets, I am looking into it. The trouble is that I am still not used to looking at this kind of output and am not sure where to start.
C:\Users\_User_>C:\temp\fileCreatorGUI\fileCreatorGUI.exe
Traceback (most recent call last):
File "F:\Users\_User_\python_working\fileCreatorGUI.py", line 73, in <module>
app = gui()
File "C:\Users\_User_\AppData\Local\Programs\Python\Python35\lib\site-packages\appJar\appjar.py", line 509, in __init__
self.topLevel.wm_iconbitmap(self.appJarIcon)
File "C:\Users\_User_\AppData\Local\Programs\Python\Python35\lib\tkinter\__init__.py", line 1716, in wm_iconbitmap
return self.tk.call('wm', 'iconbitmap', self._w, bitmap)
_tkinter.TclError: bitmap "C:\temp\fileCreatorGUI\appJar\resources\icons\favicon.ico" not defined
Failed to execute script fileCreatorGUI
Edit 2
See answer below, but I was barking up the wrong tree on this one,
The Pyinstaller output chokes on the .dll's:
api-ms-win-core-console-l1-1-0.dll
api-ms-win-core-datetime-l1-1-0.dll
(There are like ~40 of these)
I added those .dll's to the python path, I declared them in the bianaries in the .spec file.
here is a truncated log:
2414 WARNING: Can not get binary dependencies for file: C:\Windows\system32\api-
ms-win-crt-stdio-l1-1-0.dll
Traceback (most recent call last):
File "C:\Users\_USER_NAME\AppData\Local\Programs\Python\Python35-32\lib\site-pa
ckages\PyInstaller\depend\bindepend.py", line 695, in getImports
return _getImports_pe(pth)
File "C:\Users\_USER_NAME\AppData\Local\Programs\Python\Python35-32\lib\site-pa
ckages\PyInstaller\depend\bindepend.py", line 122, in _getImports_pe
dll, _ = sym.forwarder.split('.')
TypeError: a bytes-like object is required, not 'str'
2423 WARNING: Can not get binary dependencies for file: C:\Windows\system32\api-
ms-win-crt-heap-l1-1-0.dll
I tried the fix listed here:
https://github.com/pyinstaller/pyinstaller/pull/1981
but it did not seem to make a difference.
Someone recommended adding the sys.path.insert() route but it did not make a difference either way
I also tried this in a VM with windows 7, clean install, no change. My next step is to try to use Wine in Debian, but I don't really want to go that route. Any help would be appreciated. Thank you
Turns out this was an appJar/packaging issue, the pyinstaller was not looking in the correct directory for the assets. per the dev of appJar, I commented out two lines of code in the appJar.py, lines 508-509:
if self.platform == self.WINDOWS:
self.topLevel.wm_iconbitmap(self.appJarIcon)
More on the specifics here: https://github.com/jarvisteach/appJar/issues/84
I probably can fix this by using the --path argument with pyinstaller but for the moment, the issue is fully resolved
I am trying to understand a project's source code these days. I run the project, line by line, everything works fine until this line:
res = subprocess.call(command, env=os.environ)
I checked the variable "command" and realized that this function just throw a command to another python script and try to execute it in a subprocess. So I jumped out of Eclipse, and tried to execute the command through Terminal while under the same directory.
Now this is what I got:
Traceback (most recent call last):
File "/home/elderry/Projects/git/tahoe-lafs/support/bin/tahoe", line 6, in <module>
from pkg_resources import load_entry_point
File "/usr/lib/python2.7/site-packages/pkg_resources.py", line 2850, in <module>
working_set.require(__requires__)
File "/usr/lib/python2.7/site-packages/pkg_resources.py", line 696, in require
needed = self.resolve(parse_requirements(requirements))
File "/usr/lib/python2.7/site-packages/pkg_resources.py", line 594, in resolve
raise DistributionNotFound(req)
pkg_resources.DistributionNotFound: allmydata-tahoe==1.10.0.post27
Then I completely lost my direction, where did the subprocess continue to run? Why did the script work well in program but not in Terminal? Since that script is also included in the project, with some hope I set some break points in it in Eclipse, which didn't catch anything. Is there any way to debug into the subprocess, not dive into the code of subprocess module's code itself?
I guess your main project alters PYTHONPAH (sys.path). Look in os.environ of your project and try to run second script with this environment.