Comments (19)
belono
commented on May 29, 2024
1
It seems like a python version mismatch.
Yes! When I ran it with
python3.9 qrcode_linktree.py, it worked.
Each python version has its own sites-packages folder so you can't import a library that was installed with a different python version.
- Do you have different versions of python installed on your system?
Yes, for compatibility reasons, I do. Ok, so how do I fix this long-term?
Well, virtual environments are a good solution. I use pyenv for simplicity and power. In addition to managing the virtual environment automatically by folder, it allows you to install the version of python you want on your system. Also, it integrates very well with the most popular IDEs.
There are plenty of pyenv tutorials out there that will provide you with the information you need to use it.
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patkan
commented on May 29, 2024
Hi, on which version of the library are you working? Please try adding --pre to pip, as currently the version that supports all of this is not in pypi yet. (We are in the process of finishing the release)
Otherwise, I would suspect that pip has installed version 2.2.0
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matiasw
commented on May 29, 2024
The thing is, I used to have some ancient version of python-escpos which worked. I only tried installing again after running into these problems.
I noticed a warning from the install process that I did not catch before: WARNING: python-escpos 2.2.0 does not provide the extra 'all'. Otherwise, it seems you are correct, and the installed version is 2.2.0: Requirement already satisfied: python-escpos [...] (2.2.0)
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patkan
commented on May 29, 2024
OK, so either you try to install that old version, or you try it with --pre in order to install the most recent pre-release.
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matiasw
commented on May 29, 2024
I should have clarified that I already did the install with pip install python-escpos --pre, but only got the Requirement already satisfied message. With pip install python-escpos[all] --pre, I get the same, but with an added WARNING: python-escpos 2.2.0 does not provide the extra 'all'. As for the old version, I wish I could go back to it, but I no longer have it installed and do not know what version it was.
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belono
commented on May 29, 2024
Hi @matiasw and thanks for your interest in python-escpos.
The latest version published to pypi was v.3.0a9 on May-11, however the ability for automatically install optional dependencies (the [all] tag) is later. It was merged into master through #546 on August-16 so that feature has not been published to pypi, yet.
Your options are:
Install optional dependencies manually:
Use USB connection: pip install pyusb
Use Serial connection: pip install pyserial
Use CUPS client on non Windows: pip install pycups
Use Win32 client on Windows: pip install pywin32
And then:
-
(Recommended) Install python-escpos v.3.0.a9 through pypi:
pip install python-escpos --pre -
Or install the in-development version from master sources using git:
git clone https://github.com/python-escpos/python-escpos.git
git submodule update --init --recursive
pip install -e \python-escpos
Note that maybe I made some typo as it is some time since I used this installation mode.
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matiasw
commented on May 29, 2024
Thanks for trying to help, @belono , but as I said, pip install python-escpos --pre does not install python-escpos 3.0.a9, or indeed anything later than 2.2.0.
Here is the full output:
pip install python-escpos --pre
Requirement already satisfied: python-escpos in c:\users\matia\appdata\local\packages\pythonsoftwarefoundation.python.3.9_qbz5n2kfra8p0\localcache\local-packages\python39\site-packages (2.2.0)
Requirement already satisfied: pyusb>=1.0.0 in c:\users\matia\appdata\local\packages\pythonsoftwarefoundation.python.3.9_qbz5n2kfra8p0\localcache\local-packages\python39\site-packages (from python-escpos) (1.2.1)
Requirement already satisfied: Pillow>=2.0 in c:\users\matia\appdata\local\packages\pythonsoftwarefoundation.python.3.9_qbz5n2kfra8p0\localcache\local-packages\python39\site-packages (from python-escpos) (9.1.0)
Requirement already satisfied: qrcode>=4.0 in c:\users\matia\appdata\local\packages\pythonsoftwarefoundation.python.3.9_qbz5n2kfra8p0\localcache\local-packages\python39\site-packages (from python-escpos) (7.3.1)
Requirement already satisfied: pyserial in c:\users\matia\appdata\local\packages\pythonsoftwarefoundation.python.3.9_qbz5n2kfra8p0\localcache\local-packages\python39\site-packages (from python-escpos) (3.5)
Requirement already satisfied: six in c:\users\matia\appdata\local\packages\pythonsoftwarefoundation.python.3.9_qbz5n2kfra8p0\localcache\local-packages\python39\site-packages (from python-escpos) (1.16.0)
Requirement already satisfied: appdirs in c:\users\matia\appdata\local\packages\pythonsoftwarefoundation.python.3.9_qbz5n2kfra8p0\localcache\local-packages\python39\site-packages (from python-escpos) (1.4.4)
Requirement already satisfied: pyyaml in c:\users\matia\appdata\local\packages\pythonsoftwarefoundation.python.3.9_qbz5n2kfra8p0\localcache\local-packages\python39\site-packages (from python-escpos) (6.0)
Collecting argparse (from python-escpos)
Using cached argparse-1.4.0-py2.py3-none-any.whl (23 kB)
Requirement already satisfied: argcomplete in c:\users\matia\appdata\local\packages\pythonsoftwarefoundation.python.3.9_qbz5n2kfra8p0\localcache\local-packages\python39\site-packages (from python-escpos) (2.0.0)
Requirement already satisfied: colorama in c:\users\matia\appdata\local\packages\pythonsoftwarefoundation.python.3.9_qbz5n2kfra8p0\localcache\local-packages\python39\site-packages (from qrcode>=4.0->python-escpos) (0.4.4)
Installing collected packages: argparse
Successfully installed argparse-1.4.0
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matiasw
commented on May 29, 2024
- Or install the in-development version from master sources using git:
git clone https://github.com/python-escpos/python-escpos.git
git submodule update --init --recursive
pip install -e \python-escpos
Note that maybe I made some typo as it is some time since I used this installation mode.
I did this, with the same result as before:
Traceback (most recent call last):
File "C:\work\code\python-escpos2\qrcode_linktree.py", line 3, in <module>
from escpos.printer import Usb
ImportError: No module named escpos.printer
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matiasw
commented on May 29, 2024
I also got is not recognized as an internal or external command, operable program or batch file. for python-escpos, because it is not added to PATH by this process. Running it directly, this is the output:
C:\Users\matia\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.9_qbz5n2kfra8p0\LocalCache\local-packages\Python39\Scripts\python-escpos.exe
Traceback (most recent call last):
File "C:\Program Files\WindowsApps\PythonSoftwareFoundation.Python.3.9_3.9.3568.0_x64__qbz5n2kfra8p0\lib\runpy.py", line 197, in _run_module_as_main
return _run_code(code, main_globals, None,
File "C:\Program Files\WindowsApps\PythonSoftwareFoundation.Python.3.9_3.9.3568.0_x64__qbz5n2kfra8p0\lib\runpy.py", line 87, in _run_code
exec(code, run_globals)
File "C:\Users\matia\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.9_qbz5n2kfra8p0\LocalCache\local-packages\Python39\Scripts\python-escpos.exe\__main__.py", line 4, in <module>
File "C:\work\code\python-escpos2\python-escpos\src\escpos\cli.py", line 25, in <module>
from . import config
File "C:\work\code\python-escpos2\python-escpos\src\escpos\config.py", line 10, in <module>
from . import exceptions, printer
File "C:\work\code\python-escpos2\python-escpos\src\escpos\printer\__init__.py", line 4, in <module>
from .cups import CupsPrinter
File "C:\work\code\python-escpos2\python-escpos\src\escpos\printer\cups.py", line 16, in <module>
from ..escpos import Escpos
File "C:\work\code\python-escpos2\python-escpos\src\escpos\escpos.py", line 24, in <module>
from escpos.capabilities import get_profile
File "C:\work\code\python-escpos2\python-escpos\src\escpos\capabilities.py", line 178, in <module>
ProfileBaseClass: Any = get_profile_class("default")
File "C:\work\code\python-escpos2\python-escpos\src\escpos\capabilities.py", line 158, in get_profile_class
profiles: Dict[str, Any] = CAPABILITIES["profiles"]
TypeError: string indices must be integers
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matiasw
commented on May 29, 2024
The install-time warning is as follows:
WARNING: The script python-escpos.exe is installed in 'C:\Users\matia\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.9_qbz5n2kfra8p0\LocalCache\local-packages\Python39\Scripts' which is not on PATH. Consider adding this directory to PATH or, if you prefer to suppress this warning, use --no-warn-script-location.
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belono
commented on May 29, 2024
I can't reproduce your issue on a fresh python-escpos install in my Windows VM.
Let's try this:
1 - Use a global import statement:
import` escpos.printer as printer
p = printer.Usb(0x0416, 0xaabb)
2 - If the above fails:
What about uninstalling the previous installation and then re-install forcing an specific pypi version?
pip uninstall python-escpos
pip install python-escpos==3.0.a9
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matiasw
commented on May 29, 2024
1 - Use a global import statement:
import` escpos.printer as printer p = printer.Usb(0x0416, 0xaabb)
python3
Python 3.9.13 (tags/v3.9.13:6de2ca5, May 17 2022, 16:36:42) [MSC v.1929 64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import escpos.printer as printer
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "C:\work\code\python-escpos\src\escpos\printer\__init__.py", line 4, in <module>
from .cups import CupsPrinter
File "C:\work\code\python-escpos\src\escpos\printer\cups.py", line 16, in <module>
from ..escpos import Escpos
File "C:\work\code\python-escpos\src\escpos\escpos.py", line 24, in <module>
from escpos.capabilities import get_profile
File "C:\work\code\python-escpos\src\escpos\capabilities.py", line 178, in <module>
ProfileBaseClass: Any = get_profile_class("default")
File "C:\work\code\python-escpos\src\escpos\capabilities.py", line 158, in get_profile_class
profiles: Dict[str, Any] = CAPABILITIES["profiles"]
TypeError: string indices must be integers
2 - If the above fails: What about uninstalling the previous installation and then re-install forcing an specific pypi version?
pip uninstall python-escpospip install python-escpos==3.0.a9
pip uninstall python-escpos
Found existing installation: python-escpos 3.0a10.dev45+g5d3d2ca
Uninstalling python-escpos-3.0a10.dev45+g5d3d2ca:
Would remove:
c:\users\matia\appdata\local\packages\pythonsoftwarefoundation.python.3.9_qbz5n2kfra8p0\localcache\local-packages\python39\scripts\python-escpos.exe
c:\users\matia\appdata\local\packages\pythonsoftwarefoundation.python.3.9_qbz5n2kfra8p0\localcache\local-packages\python39\site-packages\__editable__.python_escpos-3.0a10.dev45+g5d3d2ca.pth
c:\users\matia\appdata\local\packages\pythonsoftwarefoundation.python.3.9_qbz5n2kfra8p0\localcache\local-packages\python39\site-packages\python_escpos-3.0a10.dev45+g5d3d2ca.dist-info\*
Proceed (Y/n)?
Successfully uninstalled python-escpos-3.0a10.dev45+g5d3d2ca
C:\work\code>pip install python-escpos==3.0.a9
Collecting python-escpos==3.0.a9
Downloading python_escpos-3.0a9-py3-none-any.whl.metadata (5.4 kB)
Requirement already satisfied: Pillow>=2.0 in c:\users\matia\appdata\local\packages\pythonsoftwarefoundation.python.3.9_qbz5n2kfra8p0\localcache\local-packages\python39\site-packages (from python-escpos==3.0.a9) (9.1.0)
Requirement already satisfied: PyYAML in c:\users\matia\appdata\local\packages\pythonsoftwarefoundation.python.3.9_qbz5n2kfra8p0\localcache\local-packages\python39\site-packages (from python-escpos==3.0.a9) (6.0)
Requirement already satisfied: appdirs in c:\users\matia\appdata\local\packages\pythonsoftwarefoundation.python.3.9_qbz5Requirement already satisfied: argcomplete in c:\users\matia\appdata\local\packages\pythonsoftwarefoundation.python.3.9_qbz5n2kfra8p0\localcache\local-packages\python39\site-packages (from python-escpos==3.0.a9) (2.0.0)
Collecting argparse (from python-escpos==3.0.a9)
Using cached argparse-1.4.0-py2.py3-none-any.whl (23 kB)
Requirement already satisfied: future in c:\users\matia\appdata\local\packages\pythonsoftwarefoundation.python.3.9_qbz5n2kfra8p0\localcache\local-packages\python39\site-packages (from python-escpos==3.0.a9) (0.18.3)
Requirement already satisfied: pyserial in c:\users\matia\appdata\local\packages\pythonsoftwarefoundation.python.3.9_qbz5n2kfra8p0\localcache\local-packages\python39\site-packages (from python-escpos==3.0.a9) (3.5)
Requirement already satisfied: python-barcode<1,>=0.9.1 in c:\users\matia\appdata\local\packages\pythonsoftwarefoundation.python.3.9_qbz5n2kfra8p0\localcache\local-packages\python39\site-packages (from python-escpos==3.0.a9) (0.15.1)
Requirement already satisfied: pyusb>=1.0.0 in c:\users\matia\appdata\local\packages\pythonsoftwarefoundation.python.3.9_qbz5n2kfra8p0\localcache\local-packages\python39\site-packages (from python-escpos==3.0.a9) (1.2.1)
Requirement already satisfied: qrcode>=4.0 in c:\users\matia\appdata\local\packages\pythonsoftwarefoundation.python.3.9_qbz5n2kfra8p0\localcache\local-packages\python39\site-packages (from python-escpos==3.0.a9) (7.3.1)
Requirement already satisfied: setuptools in c:\program files\windowsapps\pythonsoftwarefoundation.python.3.9_3.9.3568.0_x64__qbz5n2kfra8p0\lib\site-packages (from python-escpos==3.0.a9) (58.1.0)
Requirement already satisfied: six in c:\users\matia\appdata\local\packages\pythonsoftwarefoundation.python.3.9_qbz5n2kfra8p0\localcache\local-packages\python39\site-packages (from python-escpos==3.0.a9) (1.16.0)
Requirement already satisfied: colorama in c:\users\matia\appdata\local\packages\pythonsoftwarefoundation.python.3.9_qbz5n2kfra8p0\localcache\local-packages\python39\site-packages (from qrcode>=4.0->python-escpos==3.0.a9) (0.4.4)
Downloading python_escpos-3.0a9-py3-none-any.whl (48 kB)
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 48.7/48.7 kB 1.2 MB/s eta 0:00:00
Installing collected packages: argparse, python-escpos
WARNING: The script python-escpos.exe is installed in 'C:\Users\matia\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.9_qbz5n2kfra8p0\LocalCache\local-packages\Python39\Scripts' which is not on PATH.
Consider adding this directory to PATH or, if you prefer to suppress this warning, use --no-warn-script-location.
Successfully installed argparse-1.4.0 python-escpos-3.0a9
C:\work\code>python-escpos
'python-escpos' is not recognized as an internal or external command,
operable program or batch file.
And if I run it directly:
C:\Users\matia\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.9_qbz5n2kfra8p0\LocalCache\local-packages\Python39\Scripts\python-escpos.exe
Traceback (most recent call last):
File "C:\Users\matia\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.9_qbz5n2kfra8p0\LocalCache\local-packages\Python39\site-packages\escpos\config.py", line 74, in load
with open(config_path, "rb") as config_file:
FileNotFoundError: [Errno 2] No such file or directory: 'C:\\Users\\matia\\AppData\\Local\\python-escpos\\python-escpos\\config.yaml'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "C:\Program Files\WindowsApps\PythonSoftwareFoundation.Python.3.9_3.9.3568.0_x64__qbz5n2kfra8p0\lib\runpy.py", line 197, in _run_module_as_main
return _run_code(code, main_globals, None,
File "C:\Program Files\WindowsApps\PythonSoftwareFoundation.Python.3.9_3.9.3568.0_x64__qbz5n2kfra8p0\lib\runpy.py", line 87, in _run_code
exec(code, run_globals)
File "C:\Users\matia\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.9_qbz5n2kfra8p0\LocalCache\local-packages\Python39\Scripts\python-escpos.exe\__main__.py", line 7, in <module>
File "C:\Users\matia\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.9_qbz5n2kfra8p0\LocalCache\local-packages\Python39\site-packages\escpos\cli.py", line 545, in main
saved_config.load(config_path)
File "C:\Users\matia\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.9_qbz5n2kfra8p0\LocalCache\local-packages\Python39\site-packages\escpos\config.py", line 77, in load
raise exceptions.ConfigNotFoundError(
escpos.exceptions.ConfigNotFoundError: Configuration not found (Couldn't read config at C:\Users\matia\AppData\Local\python-escpos\python-escpos\config.yaml)
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belono
commented on May 29, 2024
Please try setting this environment variable at your prompt:
set ESCPOS_CAPABILITIES_FILE=C:\work\code\python-escpos\capabilities-data\capabilities.json
or wherever the capabilities.json file is located in your python-escpos installation.
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patkan
commented on May 29, 2024
Thanks for trying to help, @belono , but as I said,
pip install python-escpos --predoes not install python-escpos 3.0.a9, or indeed anything later than 2.2.0. Here is the full output:pip install python-escpos --pre Requirement already satisfied: python-escpos in c:\users\matia\appdata\local\packages\pythonsoftwarefoundation.python.3.9_qbz5n2kfra8p0\localcache\local-packages\python39\site-packages (2.2.0) Requirement already satisfied: pyusb>=1.0.0 in c:\users\matia\appdata\local\packages\pythonsoftwarefoundation.python.3.9_qbz5n2kfra8p0\localcache\local-packages\python39\site-packages (from python-escpos) (1.2.1) Requirement already satisfied: Pillow>=2.0 in c:\users\matia\appdata\local\packages\pythonsoftwarefoundation.python.3.9_qbz5n2kfra8p0\localcache\local-packages\python39\site-packages (from python-escpos) (9.1.0) Requirement already satisfied: qrcode>=4.0 in c:\users\matia\appdata\local\packages\pythonsoftwarefoundation.python.3.9_qbz5n2kfra8p0\localcache\local-packages\python39\site-packages (from python-escpos) (7.3.1) Requirement already satisfied: pyserial in c:\users\matia\appdata\local\packages\pythonsoftwarefoundation.python.3.9_qbz5n2kfra8p0\localcache\local-packages\python39\site-packages (from python-escpos) (3.5) Requirement already satisfied: six in c:\users\matia\appdata\local\packages\pythonsoftwarefoundation.python.3.9_qbz5n2kfra8p0\localcache\local-packages\python39\site-packages (from python-escpos) (1.16.0) Requirement already satisfied: appdirs in c:\users\matia\appdata\local\packages\pythonsoftwarefoundation.python.3.9_qbz5n2kfra8p0\localcache\local-packages\python39\site-packages (from python-escpos) (1.4.4) Requirement already satisfied: pyyaml in c:\users\matia\appdata\local\packages\pythonsoftwarefoundation.python.3.9_qbz5n2kfra8p0\localcache\local-packages\python39\site-packages (from python-escpos) (6.0) Collecting argparse (from python-escpos) Using cached argparse-1.4.0-py2.py3-none-any.whl (23 kB) Requirement already satisfied: argcomplete in c:\users\matia\appdata\local\packages\pythonsoftwarefoundation.python.3.9_qbz5n2kfra8p0\localcache\local-packages\python39\site-packages (from python-escpos) (2.0.0) Requirement already satisfied: colorama in c:\users\matia\appdata\local\packages\pythonsoftwarefoundation.python.3.9_qbz5n2kfra8p0\localcache\local-packages\python39\site-packages (from qrcode>=4.0->python-escpos) (0.4.4) Installing collected packages: argparse Successfully installed argparse-1.4.0
If a pip requirement is already satisfied (installed), you need to tell pip that it should upgrade to the newest version by also adding --upgrade.
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matiasw
commented on May 29, 2024
Please try setting this environment variable at your prompt:
set ESCPOS_CAPABILITIES_FILE=C:\work\code\python-escpos\capabilities-data\capabilities.jsonor wherever the
capabilities.jsonfile is located in your python-escpos installation.
It was actually under dist in that directory. After setting it, I get
set ESCPOS_CAPABILITIES_FILE=C:\work\code\python-escpos\capabilities-data\dist\capabilities.json
C:\work\code>C:\Users\matia\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.9_qbz5n2kfra8p0\LocalCache\local-packages\Python39\Scripts\python-escpos.exe
Traceback (most recent call last):
File "C:\Users\matia\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.9_qbz5n2kfra8p0\LocalCache\local-packages\Python39\site-packages\escpos\config.py", line 74, in load
with open(config_path, "rb") as config_file:
FileNotFoundError: [Errno 2] No such file or directory: 'C:\\Users\\matia\\AppData\\Local\\python-escpos\\python-escpos\\config.yaml'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "C:\Program Files\WindowsApps\PythonSoftwareFoundation.Python.3.9_3.9.3568.0_x64__qbz5n2kfra8p0\lib\runpy.py", line 197, in _run_module_as_main
return _run_code(code, main_globals, None,
File "C:\Program Files\WindowsApps\PythonSoftwareFoundation.Python.3.9_3.9.3568.0_x64__qbz5n2kfra8p0\lib\runpy.py", line 87, in _run_code
exec(code, run_globals)
File "C:\Users\matia\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.9_qbz5n2kfra8p0\LocalCache\local-packages\Python39\Scripts\python-escpos.exe\__main__.py", line 7, in <module>
File "C:\Users\matia\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.9_qbz5n2kfra8p0\LocalCache\local-packages\Python39\site-packages\escpos\cli.py", line 545, in main
saved_config.load(config_path)
File "C:\Users\matia\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.9_qbz5n2kfra8p0\LocalCache\local-packages\Python39\site-packages\escpos\config.py", line 77, in load
raise exceptions.ConfigNotFoundError(
escpos.exceptions.ConfigNotFoundError: Configuration not found (Couldn't read config at C:\Users\matia\AppData\Local\python-escpos\python-escpos\config.yaml)
If a pip requirement is already satisfied (installed), you need to tell pip that it should upgrade to the newest version by also adding
--upgrade.
I already have used that switch, as in pip install python-escpos --pre --upgrade. 3.0.9a is now seemingly installed (the version number has changed to 3.0.9a in the already satisfied message), but the installation is somehow totally borked and can't find anything.
from python-escpos.
belono
commented on May 29, 2024
It was actually under dist in that directory. After setting it, I get
set ESCPOS_CAPABILITIES_FILE=C:\work\code\python-escpos\capabilities-data\dist\capabilities.json C:\work\code>C:\Users\matia\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.9_qbz5n2kfra8p0\LocalCache\local-packages\Python39\Scripts\python-escpos.exe Traceback (most recent call last): File "C:\Users\matia\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.9_qbz5n2kfra8p0\LocalCache\local-packages\Python39\site-packages\escpos\config.py", line 74, in load with open(config_path, "rb") as config_file: FileNotFoundError: [Errno 2] No such file or directory: 'C:\\Users\\matia\\AppData\\Local\\python-escpos\\python-escpos\\config.yaml'
Ok. If I'm not mistaken:
- You have a problem with your path not finding the python-escpos command. You must add
C:\Users\matia\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.9_qbz5n2kfra8p0\LocalCache\local-packages\Python39\Scripts\to your PATH in order to call python-escpos.exe from everywhere. Otherwise, as you already checked, you have tocdto that folder if you want to run the file. - You are using the python-escpos CLI but you don't have a config file.
In order to use the python-escpos CLI you need to provide a config.yaml file with the configuration of the connection to the printer as is documented at the python-escpos docs
The firstFileNotFoundErroris telling you that.
So create a new file named config.yaml and add the following content, save and close:
printer:
type: Usb
idVendor: 0x0416
idProduct: 0xaabb
Then call the python-escpos CLI adding the -c option pointing to your newly created config.yaml
python-escpos -c <path-to-config.yaml> <print-commands>
Note that you still need the ESCPOS_CAPABILITIES_FILE environment variable to be set before running python-escpos.exe.
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matiasw
commented on May 29, 2024
Ok, I finally got it working with the CLI tool, but my code will still not work, even after setting PATH:
Traceback (most recent call last):
File "C:\work\code\python-escpos\qrcode_linktree.py", line 3, in <module>
from escpos.printer import Usb
ImportError: No module named escpos.printer
Edit: to clarify about the PATH: pip show python-escpos gives:
Name: python-escpos
Version: 3.0a9
Summary: Python library to manipulate ESC/POS Printers
Author: Manuel F Martinez and others
Author-email: [email protected]
License: MIT
Location: c:\users\matia\appdata\local\packages\pythonsoftwarefoundation.python.3.9_qbz5n2kfra8p0\localcache\local-packages\python39\site-packages
Requires: appdirs, argcomplete, argparse, future, Pillow, pyserial, python-barcode, pyusb, PyYAML, qrcode, setuptools, six
Required-by:
and c:\users\matia\appdata\local\packages\pythonsoftwarefoundation.python.3.9_qbz5n2kfra8p0\localcache\local-packages\python39\site-packages is in PATH. Shouldn't this be enough?
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belono
commented on May 29, 2024
It seems like a python version mismatch.
- Do you have different versions of python installed on your system?
- Are you using some kind of 'virtual env', venv, pyenv, pipenv, that you forgot to activate?
- What if you specify the python version when installing via pip?
python3.9 -m pip install python-escpos==3.0a9
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matiasw
commented on May 29, 2024
It seems like a python version mismatch.
Yes! When I ran it with python3.9 qrcode_linktree.py, it worked.
- Do you have different versions of python installed on your system?
Yes, for compatibility reasons, I do.
Ok, so how do I fix this long-term?
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Related Issues (20)
- Cannot write special characters for network printer HOT 3
- Help removing whitespace at top of print HOT 2
- Programmatically get PID and VID HOT 2
- capabilities.json is empty ! HOT 5
- Capabilities handling improvement
- revise console output HOT 1
- Magic encoder does not use previously used code pages when possible HOT 3
- When I print a receipt with images I get an error, please help. HOT 10
- pip package "python-escpos" wildly out of date HOT 5
- failed to open device that does not exist. HOT 4
- Text size not working (width and height) HOT 11
- Image printing prints only garbage HOT 29
- Barcode not printed HOT 4
- Introduce IntEnum or similar for printer states
- Usb printer not working on web Application HOT 2
- Printer not found on web application HOT 1
- Font switching not working. HOT 3
- is_online() fails with raise NotImplementedError()
- Full cut not working on Epson TM-T20III HOT 2
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