- Example of non - blocking PythonLIRC, when waiting for incoming IR input.
sockid = lirc.init("python3", ".lircrc". blocking=False)
- The default method will halt the whole terminal in case
lirc.nextcode() issued.
- With
blocking=False, lirc.nextcode() will not halt the whole program.
- I got this information from here, https://github.com/tompreston/python-lirc/issues/2.
- Here is an example of
requirement.txt for pip. This is similar to package.json in NPM.
# Requirements without version specifiers.
beautifulsoup4
nose
nose-cov
# Requirements with version specifiers.
coverage != 3.5 # Version exclusion. Anything except version 3.5.
docopt == 0.6.1 # Version matching. Must be version 0.6.1.
keyring >= 4.1.1 # Minimum version 4.1.1.
Mopidy-Dirble ~= 1.1 # Compatible release. Same as >= 1.1, == 1.*.
# Refer to other requirements files.
-r other-requirements.txt
# A particular file.
./downloads/numpy-1.9.2-cp34-none-win32.whl
http://wxpython.org/Phoenix/snapshot-builds/wxPython_Phoenix-3.0.3.dev1820+49a8884-cp34-none-win_amd64.whl
# Additional requirements without version specifiers.
# Same as 1st section, just here to show that you can
# put things in any order.
green
rejected
- The command for installing Python libraries within a virtual environment is
pip install -r requirement.txt or pip3 install -r requirement.txt.
- There is this command to list all used Python dependencies automatically,
pip freeze > requirements.txt or pip3 freeze > requirements.txt. However, if you are not in virtual environment, this command will list all installed Python libraries system wide.
- There is actually pre - compiled OpenCV 3.1.0 in PyPI. It is listed as
opencv-python. However, using this breaks my program for some reason that I do not know yet.
- For this case, I opened a StackOverflow thread over here, http://stackoverflow.com/questions/41539595/python-opencv-returns-215-scn-3-scn-4-in-function-cvtcolor-if-usin.
- But nothing in that thread just yet, sadly. Here is the screenshot of my thread in StackOverflow.
- There is a problem when using LIRC in my main application for this project that says along this line, "LIRC, unable to read module.".
- This usually happens because of these.
- At this moment my programming threads are never closed properly. Hence, sometimes the LIRC is still "listening" to previous run and not prepared for the current run.
- Did not use
sudo when launching the program. For the current release I did everything in sudo for the Raspbian. I do not know yet on how to properly assign user permission in Linux.
- Halted by blocking
lirc.nextcode(). So please use, sockid = lirc.init("python3", ".lircrc". blocking=False).
- Example on how to sort an array/list of string in Python.
mylist = ["b", "C", "A"]
mylist.sort()
del exampleList[0] # Deleting element at index 0 `exampleList`.
del exampleList[:-2] # Deleting the last 2 elements in `exampleList`.
del exampleList[:2] # Deleting the first 2 elements in `exampleList`.
del exampleList[:] # Deleting all elements in `exampleList`.
exampleString = "abcdefghij"
exampleString = exampleString[:-2]
- I think I can use the same operation for deleting element(s) in an array/list in Python for string as well.