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When no prefix character is given, native mode is the default. Itpacks or unpacks data based on the platform and compiler on whichthe Python interpreter was built.The result of packing a given C struct includes pad bytes whichmaintain proper alignment for the C types involved; similarly,alignment is taken into account when unpacking. In contrast, whencommunicating data between external sources, the programmer isresponsible for defining byte ordering and padding between elements.See Byte Order, Size, and Alignment for details.
Format strings describe the data layout whenpacking and unpacking data. They are built up from format characters,which specify the type of data being packed/unpacked. In addition,special characters control the byte order, size and alignment.Each format string consists of an optional prefix character whichdescribes the overall properties of the data and one or more formatcharacters which describe the actual data values and padding.
When attempting to pack a non-integer using any of the integer conversioncodes, if the non-integer has a __index__() method then that method iscalled to convert the argument to an integer before packing.
For the 'f', 'd' and 'e' conversion codes, the packedrepresentation uses the IEEE 754 binary32, binary64 or binary16 format (for'f', 'd' or 'e' respectively), regardless of the floating-pointformat used by the platform.
For the 's' format character, the count is interpreted as the length of thebytes, not a repeat count like for the other format characters; for example,'10s' means a single 10-byte string mapping to or from a singlePython byte string, while '10c' means 10separate one byte character elements (e.g., cccccccccc) mappingto or from ten different Python byte objects. (See Examplesfor a concrete demonstration of the difference.)If a count is not given, it defaults to 1. For packing, the string istruncated or padded with null bytes as appropriate to make it fit. Forunpacking, the resulting bytes object always has exactly the specified numberof bytes. As a special case, '0s' means a single, empty string (while'0c' means 0 characters).
The ordering of format characters may have an impact on size in nativemode since padding is implicit. In standard mode, the user isresponsible for inserting any desired padding.Note inthe first pack call below that three NUL bytes were added after thepacked '#' to align the following integer on a four-byte boundary.In this example, the output was produced on a little endian machine:
Python modules are packages, or modules, which can be imported into a project to use. This includes packages like matplotlib, numpy, flask, and many more. To install and uninstall packages for Python you need to use Pip; PIP is a package manager for Python packages, or modules.
Python modules that are stored on your home drive, will only be accessible by you. Other students, faculty, and staff that require the same packages will have to individually run the following commands as well for shared Python projects.
By default Python packages installed through pip using the '--user' flag will be stored in one of the following locations in your home directory, depending on which version of python you installed the package for:
This module encapsulates the access for the serial port. It providesback-ends for standard Python running on Windows, Linux, BSD (possiblyany POSIX compliant system). The module named "serial" automaticallyselects the appropriate back-end. Tags: Software Development: Python Development, Libraries, Implemented in: implemented-in::python, role::app-data
I had the same issue and I tried all the suggestions I encountered on the internet, but non has worked for me. Finally, I was able to solve the problem by uninstalling the serial package from usr/local/lib that had the issue for some reason. you can uninstall this package by sudo pip uninstall serial.Here is what you can try:
List additional relevant URLs about your project. This is the place to link tobug trackers, source repositories, or where to support package development.The string of the key is the exact text that will be displayed on PyPI.
Set packages to a list of all packages in yourproject, including their subpackages, sub-subpackages, etc. Although thepackages can be listed manually, setuptools.find_packages() finds themautomatically. Use the include keyword argument to find only the givenpackages. Use the exclude keyword argument to omit packages that are notintended to be released and installed.
If your project only runs on certain Python versions, setting thepython_requires argument to the appropriate PEP 440 version specifierstring will prevent pip from installing the project on other Pythonversions. For example, if your package is for Python 3+ only, write:
Although configuring package_data is sufficient for most needs, in somecases you may need to place data files outside of your packages. The data_files directive allows you to do that.It is mostly useful if you need to install files which are used by otherprograms, which may be unaware of Python packages.
When installing packages as egg, data_files is not supported.So, if your project uses setuptools, you must use pipto install it. Alternatively, if you must use python setup.py,then you need to pass the --old-and-unmanageable option.
While serial versioning is very easy to manage as a developer, it is the hardest to trackas an end user, as serial version numbers convey little or no information regarding APIbackwards compatibility.
In other resources you may encounter references to usingpython setup.py register and python setup.py upload. These methodsof registering and uploading a package are strongly discouraged as it mayuse a plaintext HTTP or unverified HTTPS connection on some Python versions,allowing your username and password to be intercepted during transmission.
The reStructuredText parser used on PyPI is not Sphinx!Furthermore, to ensure safety of all users, certain kinds of URLs anddirectives are forbidden or stripped out (e.g., the .. raw::directive). Before trying to upload your distribution, you should checkto see if your brief / long descriptions provided in setup.py arevalid. You can do this by running twine check onyour package files:
You can see if your package has successfully uploaded by navigating to the URL where sampleproject isthe name of your project that you uploaded. It may take a minute or two foryour project to appear on the site.
You should always check for a package in the Linux distro repository first. It is possible the package available may not be the latest version, however, enabling autoupdate will ensure the Linux Agent will always get the latest update. Should you have issues installing from the package managers, you should seek support from the distro vendor.
Enable agent auto update.This version of Debian doesn't have a version >= 2.0.16, therefore AutoUpdate isn't available for it. The output from the above command will show you if the package is up-to-date.
In this article, we explain how to uninstall Python packages using these popular tools and we also introduce you to the ActiveState Platform. The AS Platform is unique in automatically installing and uninstalling transitive dependencies. Our dependency management system makes it possible to track conflicts between packages, know about platform-specific dependencies, and even track system-level dependencies like C and C++ libraries. Once you are done reading, you can try the ActiveState Platform by signing up for a free account.
When you install a package with pip, it also installs all of the dependencies the package requires. Unfortunately, pip does not uninstall dependencies when you uninstall the original package. Here are a couple of different procedures that can be used to uninstall dependencies.
AsciiSerial and BinarySerial constructors may fail when used with pyserial versions later than 2.7, because of this bug, which looks like it may be fixed in the next release after 3.0.1. Until then if you encounter this problem we recommend manually installing pyserial 2.7:
Class names are accessible via more paths than intended, and the documentation is confusing about whether the library contains one module or three. It is intended to appear as one module; class names live under zaber.serial, not zaber.serial.ascii etc.
jSerialComm is a Java library designed to provide a platform-independent way to access standard serial ports without requiring external libraries, native code, or any other tools. It is meant as an alternative to RxTx and the (deprecated) Java Communications API, with increased ease-of-use, an enhanced support for timeouts, and the ability to open multiple ports simultaneously.
To access the contents of the library in your project, make sure to import com.fazecast.jSerialComm.* into your java files. You can then generate a list of all available serial ports on your system (real or virtual), by calling the following static method:
Replace the username parameter with your current username. (If you are not sure what your username is, type whoami and it will tell you.) If you are using SUSE 11.3 or higher, replace the '-a -G' flags with a single '-A' flag. Log out and you should have access to the serial port after logging back in.
Although this library was designed to be as simple and flexible as possible, you can enable a number of different modes of operation via manipulation of the serial port timeout values and the interface through which you choose to access the serial port. 2b1af7f3a8