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Drop support for Python 3.7
According to NEP 29 [1], Python 3.7 support should be dropped after Dec 26, 2021. As Matplotlib 3.6 will be out a few months from now, it is already time to be dropping 3.7. [1] https://numpy.org/neps/nep-0029-deprecation_policy.html#support-table
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‎.appveyor.yml‎

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@@ -21,15 +21,12 @@ environment:
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PINNEDVERS: "pyzmq!=21.0.0,!=22.0.0"
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matrix:
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# In theory we could use a single CONDA_INSTALL_LOCN because we construct
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# the envs anyway. But using one for the right python version hopefully
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# making things faster due to package caching.
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- PYTHON_VERSION: "3.7"
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CONDA_INSTALL_LOCN: "C:\\Miniconda37-x64"
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- PYTHON_VERSION: "3.8"
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CONDA_INSTALL_LOCN: "C:\\Miniconda3-x64"
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TEST_ALL: "no"
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EXTRAREQS: "-r requirements/testing/extra.txt"
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- PYTHON_VERSION: "3.8"
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CONDA_INSTALL_LOCN: "C:\\Miniconda37-x64"
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- PYTHON_VERSION: "3.9"
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CONDA_INSTALL_LOCN: "C:\\Miniconda3-x64"
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TEST_ALL: "no"
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EXTRAREQS: "-r requirements/testing/extra.txt"
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‎.github/workflows/cibuildwheel.yml‎

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@@ -53,7 +53,7 @@ jobs:
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- uses: actions/setup-python@v2
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name: Install Python
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with:
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python-version: '3.7'
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python-version: '3.8'
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- uses: actions/cache@v2
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id: numpy-cache
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cd numpy-${{ env.min-numpy-version }}
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python -m cibuildwheel --output-dir ../numpy-aarch64-cache
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env:
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CIBW_BUILD: "cp37-* cp38-*"
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CIBW_BUILD: "cp38-*"
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CIBW_ARCHS: aarch64
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- name: Build wheels for CPython 3.10
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run: |
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python -m cibuildwheel --output-dir dist
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env:
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CIBW_BUILD: "cp37-* cp38-*"
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CIBW_BUILD: "cp38-*"
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CIBW_MANYLINUX_X86_64_IMAGE: manylinux1
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CIBW_MANYLINUX_I686_IMAGE: manylinux1
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CIBW_BEFORE_BUILD: pip install certifi; pip install --find-links=numpy-aarch64-cache/ numpy==${{ env.min-numpy-version }}
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run: |
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python -m cibuildwheel --output-dir dist
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env:
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CIBW_BUILD: "pp37-*"
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CIBW_BUILD: "pp38-*"
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CIBW_BEFORE_BUILD: pip install certifi numpy==${{ env.min-numpy-version }}
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CIBW_ARCHS: ${{ matrix.cibw_archs }}
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PIP_USE_FEATURE: in-tree-build

‎.github/workflows/tests.yml‎

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@@ -26,20 +26,16 @@ jobs:
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include:
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- name-suffix: "(Minimum Versions)"
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os: ubuntu-18.04
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python-version: 3.7
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python-version: 3.8
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extra-requirements: '-c requirements/testing/minver.txt'
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pyqt5-ver: '==5.8 sip==4.19.7' # oldest versions with a Py3.7 wheel.
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pyqt5-ver: '==5.11.2 sip==5.0.0' # oldest versions with a Py3.8 wheel.
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delete-font-cache: true
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XVFB_RUN: xvfb-run -a
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- os: ubuntu-18.04
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python-version: 3.7
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extra-requirements: '-r requirements/testing/extra.txt'
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XVFB_RUN: xvfb-run -a
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CFLAGS: "-fno-lto" # Ensure that disabling LTO works.
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- os: ubuntu-18.04
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python-version: 3.8
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extra-requirements: '-r requirements/testing/extra.txt'
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XVFB_RUN: xvfb-run -a
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CFLAGS: "-fno-lto" # Ensure that disabling LTO works.
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- os: ubuntu-20.04
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python-version: 3.9
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extra-requirements: '-r requirements/testing/extra.txt'

‎azure-pipelines.yml‎

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- job: Pytest
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strategy:
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matrix:
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Linux_py37:
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vmImage: 'ubuntu-18.04'
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python.version: '3.7'
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Linux_py38:
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vmImage: 'ubuntu-18.04'
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python.version: '3.8'
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Linux_py39:
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vmImage: 'ubuntu-18.04'
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python.version: '3.9'
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macOS_py37:
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vmImage: 'macOS-10.15'
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python.version: '3.7'
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Linux_py310:
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vmImage: 'ubuntu-18.04'
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python.version: '3.10'
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macOS_py38:
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vmImage: 'macOS-latest'
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python.version: '3.8'
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macOS_py39:
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vmImage: 'macOS-latest'
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python.version: '3.9'
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Windows_py37:
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vmImage: 'vs2017-win2016'
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python.version: '3.7'
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macOS_py310:
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vmImage: 'macOS-latest'
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python.version: '3.10'
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Windows_py38:
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vmImage: 'windows-latest'
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python.version: '3.8'
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Windows_py39:
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vmImage: 'windows-latest'
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python.version: '3.9'
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Windows_py310:
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vmImage: 'vs2017-win2016'
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python.version: '3.10'
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maxParallel: 4
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pool:
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vmImage: '$(vmImage)'

‎doc/api/next_api_changes/development/22205-ES.rst‎

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@@ -7,6 +7,7 @@ being bumped:
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+------------+-----------------+---------------+
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| Dependency | min in mpl3.5 | min in mpl3.6 |
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+============+=================+===============+
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| Python | 3.7 | 3.8 |
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| NumPy | 1.17 | 1.19 |
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+------------+-----------------+---------------+
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‎doc/devel/coding_guide.rst‎

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@@ -271,11 +271,11 @@ The current active branches are
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*main*
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The current development version. Future minor releases (*v3.N.0*) will be
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branched from this. Supports Python 3.7+.
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branched from this.
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*v3.N.x*
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Maintenance branch for Matplotlib 3.N. Future patch releases will be
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branched from this. Supports Python 3.6+.
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branched from this.
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*v3.N.M-doc*
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Documentation for the current release. On a patch release, this will be

‎doc/devel/dependencies.rst‎

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@@ -14,7 +14,7 @@ When installing through a package manager like ``pip`` or ``conda``, the
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mandatory dependencies are automatically installed. This list is mainly for
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reference.
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* `Python <https://www.python.org/downloads/>`_ (>= 3.7)
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* `Python <https://www.python.org/downloads/>`_ (>= 3.8)
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* `NumPy <https://numpy.org>`_ (>= 1.19)
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* `setuptools <https://setuptools.readthedocs.io/en/latest/>`_
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* `cycler <https://matplotlib.org/cycler/>`_ (>= 0.10.0)

‎doc/devel/min_dep_policy.rst‎

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@@ -83,7 +83,7 @@ specification of the dependencies.
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========== ======== ======
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Matplotlib Python NumPy
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========== ======== ======
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`3.6`_ 3.7 1.19.0
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`3.6`_ 3.8 1.19.0
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`3.5`_ 3.7 1.17.0
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`3.4`_ 3.7 1.16.0
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`3.3`_ 3.6 1.15.0

‎doc/devel/testing.rst‎

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`Tox <https://tox.readthedocs.io/en/latest/>`_ is a tool for running tests
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against multiple Python environments, including multiple versions of Python
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(e.g., 3.6, 3.7) and even different Python implementations altogether
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(e.g., 3.7, 3.8) and even different Python implementations altogether
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(e.g., CPython, PyPy, Jython, etc.), as long as all these versions are
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available on your system's $PATH (consider using your system package manager,
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e.g. apt-get, yum, or Homebrew, to install them).
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.. code-block:: bash
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$ tox -e py37,py38
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$ tox -e py38,py39
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Tox processes everything serially so it can take a long time to test
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several environments. To speed it up, you might try using a new,

‎lib/matplotlib/tests/test_ticker.py‎

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float 1.41e-4, as '0.5' or as r'$\mathdefault{\frac{1}{2}}$' in float
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0.5,
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"""
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# Can inline the Unicode escapes to the raw strings in Python 3.8+
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match = re.match(
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r"[^\d]*"
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r"(?P<comp>1" "[-\N{Minus Sign}]" r")?"
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r"(?P<comp>1[-\N{Minus Sign}])?"
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r"(?P<mant>\d*\.?\d*)?"
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r"(?:\\cdot)?"
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r"(?:10\^\{(?P<expo>" "[-\N{Minus Sign}]" r"?\d*)})?"
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r"(?:10\^\{(?P<expo>[-\N{Minus Sign}]?\d*)})?"
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r"[^\d]*$",
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string,
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)

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