Add tutorial by @alexdesiqueira for Data Umbrella

workshops/2022-data-umbrella/LICENSE

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workshops/2022-data-umbrella/check_setup.py

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+import sys
+from packaging.version import Version
+
+EXIT_ERROR = 1
+PYTHON_VERSION_MAJOR = 3
+PYTHON_VERSION_MINOR = 8
+
+
+def check_python_version():
+    if ((sys.version_info.major < PYTHON_VERSION_MAJOR) or
+        (sys.version_info.minor < PYTHON_VERSION_MINOR)):
+        print(f"[!] You are running an unsupported version of Python. "
+               "This tutorial requires Python version "
+               "{PYTHON_VERSION_MAJOR}.{PYTHON_VERSION_MINOR} or newer.")
+
+        sys.exit(EXIT_ERROR)
+    return None
+
+
+def read_requirements(filename="requirements.txt"):
+    with open(filename) as file_reqs:
+        requirements = file_reqs.readlines()
+
+    requirements = [
+        (package, version) for (package, _, version) in
+        (requirement.split()
+            for requirement in requirements if requirement.strip())
+        ]
+    return requirements
+
+
+def check_setup():
+    pkg_names = {
+        "jupyter-notebook": "notebook",
+        "scikit-image": "skimage",
+    }
+
+    check_python_version()
+    requirements = read_requirements()
+
+    for (package, version_required) in requirements:
+        module_name = pkg_names.get(package, package)
+        try:
+            module = __import__(module_name)
+            status = "✓"
+        except ImportError as e:
+            module = None
+            if (package != "numpy" and "numpy" in str(e)):
+                status = "?"
+                version_installed = "Needs NumPy"
+            else:
+                version_installed = "Not installed"
+                status = "X"
+
+        if module is not None:
+            try:
+                version_installed = module.__version__
+            except AttributeError:  # specific for ITK version
+                version_installed = module.Version.GetITKVersion()
+
+            if Version(version_required) > Version(version_installed):
+                status = "X"
+        print("[{}] {:<10} {}".format(
+            status, package.ljust(16), version_installed)
+        )
+
+
+if __name__ == '__main__':
+    try:
+        check_setup()
+    except ValueError:  # avoiding error on matplotlib
+        pass

workshops/2022-data-umbrella/environment.yml

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+name: dataumbrella_skimage
+channels:
+  - conda-forge
+dependencies:
+  - python >= 3
+  - numpy == 1.22
+  - scipy == 1.8
+  - matplotlib == 3.5
+  - scikit-image
+  - notebook == 6.4
+  - itk == 5.2
+  - itkwidgets == 0.32

workshops/2022-data-umbrella/requirements.txt

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+numpy >= 1
+scipy >= 1
+matplotlib >= 2.0
+scikit-image >= 0.18
+notebook >= 4.0
+itk >= 5.0
+itkwidgets >= 0.30