Basics¶

Parselmouth can be installed like any other Python library, using (a recent version of) the Python package manager pip, on Linux, macOS, and Windows:

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To update your installed version to the latest release, add -U (or --upgrade) to the command:

Warning

While the Python module itself is called parselmouth, the Parselmouth package on the Python Package Index has the name praat-parselmouth.

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Note

To figure out if you can or should update, the version number of your current Parselmouth installation can be found in the parselmouth.VERSION variables. The version of Praat on which this version of Parselmouth is based and the release date of that Praat version are available as PRAAT_VERSION and PRAAT_VERSION_DATE, respectively.

Python distributions¶

If you use the Anaconda distribution of Python, you can use the same pip command in a terminal of the appropriate Anaconda environment, either activated through the Anaconda Navigator or conda tool.

We currently do not have Homebrew or MacPorts packages to install Parselmouth. As far as we know however, Parselmouth can just be installed with the accompanying pip of these distributions.

In priciple, recent versions of PyPy are supported by the pybind11 project and should thus also be supported by Parselmouth. However, we currently have not figured out how to provide precompiled packages, so you will have to still compile the wheel yourself (or contribute an automated way of doing this to the project!).

For other distributions of Python, we are expecting that our package is compatible with the Python versions that are out there and that pip can handle the installation. If you are using yet another Python distribution, we are definitely interested in hearing about it, so that we can add it to this list!

PsychoPy¶

As a Python library, Parselmouth can be used in a PsychoPy experiment. There are two different ways in which PsychoPy can be installed: it can just be manually installed as a standard Python library, in which case Parselmouth can just be installed next to it with pip. For Windows and Mac OS X, however, standalone versions of PsychoPy exist, and the software does currently not allow for external libraries to be installed with pip.

To install Parselmouth in a standalone version of PsychoPy, the following script can be opened and run from within the PsychoPy Coder interface: psychopy_installation.py

Note

If running the script results in an error mentioning TLSV1_ALERT_PROTOCOL_VERSION, the version of PsychoPy/Python is too old and you will need to follow the manual instructions underneath.

Alternatively, you can follow these steps to manually install Parselmouth into a standalone version of PsychoPy:

0. Find out which version of Python PsychoPy is running.

   • To do so, you can run importsys;print(sys.version_info) in the Shell tab of the PsychoPy Coder interface. Remember the first two numbers of the version (major and minor; e.g., 3.6).

   • On Windows, also run importplatform;print(platform.architecture()[0]) and remember whether the Python executable’s architecture is 32bit or 64bit.

1. Go to https://pypi.org/project/praat-parselmouth/.

2. Download the file praat_parselmouth-x.y.z-cpVV-cpVVm-AA.whl(for Windows) or praat_parselmouth-x.y.z-cpVV-cpVVm-macosx_10_6_intel.whl(for Mac OS X) - where:

   • x.y.z will be the version of Parselmouth you want to install

   • VV are the first two numbers of the Python version

   • For Windows, AA is win32 if you have a 32bit architecture, and win_amd64 for 64bit

   Be sure to find the right file in the list, containing both the correct Python version, and win32/win_amd64(Windows) or macosx(Mac OS X) in its name!

3. Rename the downloaded file by replacing the .whl extension by .zip.

4. Extract this zip archive somewhere on your computer, in your directory of choice. Remember the name and location of the extracted folder that contains the file parselmouth.pyd(Windows) or parselmouth.so(Mac OS X).

5. Open PsychoPy, open the Preferences window, go to the General tab.

6. In the General tab of the PsychoPy Preferences, in the paths field, add the folder where you just extracted the Parselmouth library to the list, enclosing the path in quotemarks. (On Windows, also replace all charachters by /.)

   • For example, if the list was empty ([]), you could make it look like ['C:/Users/Yannick/parselmouth-psychopy/'] or ['/Users/yannick/parselmouth-psychopy/'].

   • On Windows, to find the right location to enter in the PsychoPy settings, right click parselmouth.pyd, choose Properties, and look at the Location field.

   • On Mac OS X, to find the right location to enter in the PsychoPy settings, right click parselmouth.so, choose Get info, and look at the where field.

   • On Mac OS X, dragging the folder into a terminal window will also give you the full path with slashes.

7. Click Ok to save the PsychoPy settings, close the Preferences window, and restart PsychoPy.

8. Optional: if you want to check if Parselmouth was installed correctly, open the PsychoPy Coder interface, open the Shell tab, and type importparselmouth.

   • If this results in an error message, please let us know, and we’ll try to help you fix what went wrong!

   • If this does not give you an error, congratulations, you can now use Parselmouth in your PsychoPy Builder!

Note

These instructions were tested with the standalone versions 3.1.3 and 1.85.2 of PsychoPy. Things might have changed since then, so if running the script or following the manual steps results in an error, please do not hesitate to get in touch.

Troubleshooting¶

It is possible that you run into more problems when trying to install or use Parselmouth. Supporting all of the different Python versions out there is not an easy job, as there are plenty of different platforms and setups.

If you run into problems and these common solutions are not solving them, please drop by the Gitter chat room, write a message in the Google discussion group, create a GitHub issue, or write me a quick email. We would be very happy to solve these problems, so that future users can avoid them!

Multiple Python versions¶

In case you have multiple installations of Python and don’t know which pip belongs to which Python version (looking at you, OS X):

Finding out the exact location of the python executable (to call the previous command) for a certain Python installation can be done by typing the following lines in your Python interpreter:

If executing this in your Python shell would for example print /usr/bin/python, then you would run /usr/bin/python-mpipinstallpraat-parselmouth in a terminal to install Parselmouth. (-U can again be added to update an already installation to the latest version.)

Combining these two approaches, you can install Parselmouth from within Python itself without knowing where that version of Python is installed:

Extra arguments to pip can be added by inserting them as strings into the list of arguments passed to subprocess.call (e.g., to update an existing installation of Parselmouth: [...,'install','-U','praat-parselmouth']).

Pip version¶

If the standard way to install Parselmouth results in an error or takes a long time, try updating pip to the latest version (as pip needs to be a reasonably recent version to install the binary, precompiled wheels) by running

If you do not have pip installed, you follow these instructions to install pip: https://pip.pypa.io/en/stable/installing/

ImportError:DLLloadfailed on Windows¶

Sometimes on Windows, the installation works, but importing Parselmouth fails with an error message saying ImportError:DLLloadfailed:Thespecifiedmodulecouldnotbefound.. This error is cause by some missing system files, but can luckily be solved quite easily by installing the “Microsoft Visual C++ Redistributable for Visual Studio 2017”.

The “Microsoft Visual C++ Redistributable for Visual Studio 2019” installer can be downloaded from Microsoft’s website, listed under the “Other Tools and Frameworks” section. These are the direct download links to the relevant files:

Parslow Mac Os Catalina

• For a 64-bit Python installation: https://aka.ms/vs/16/release/VC_redist.x64.exe

• For a 32-bit Python installation: https://aka.ms/vs/16/release/VC_redist.x86.exe

Parslow Mac Os 7

To check which Python version you are using, you can look at the first line of output when starting a Python shell. The version information should contain [MSCv.xxxx64bit(AMD64)] in a 64-bit installation, or [MSCv.xxxx32bit(Intel)] in a 32-bit installation.