Initial commit

Author: mkonicek

.gitignore

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+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+*$py.class
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+env/
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+
+# PyInstaller
+#  Usually these files are written by a python script from a template
+#  before PyInstaller builds the exe, so as to inject date/other infos into it.
+*.manifest
+*.spec
+
+# Installer logs
+pip-log.txt
+pip-delete-this-directory.txt
+
+# Unit test / coverage reports
+htmlcov/
+.tox/
+.coverage
+.coverage.*
+.cache
+nosetests.xml
+coverage.xml
+*.cover
+.hypothesis/
+
+# Translations
+*.mo
+*.pot
+
+# Django stuff:
+*.log
+local_settings.py
+
+# Flask stuff:
+instance/
+.webassets-cache
+
+# Scrapy stuff:
+.scrapy
+
+# Sphinx documentation
+docs/_build/
+
+# PyBuilder
+target/
+
+# Jupyter Notebook
+.ipynb_checkpoints
+
+# pyenv
+.python-version
+
+# celery beat schedule file
+celerybeat-schedule
+
+# SageMath parsed files
+*.sage.py
+
+# dotenv
+.env
+
+# virtualenv
+.venv
+venv/
+ENV/
+
+# Spyder project settings
+.spyderproject
+.spyproject
+
+# Rope project settings
+.ropeproject
+
+# mkdocs documentation
+/site
+
+# mypy
+.mypy_cache/

vectors.py

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+import math
+from typing import Iterator, List
+
+Vector = List[float]
+
+class Word:
+    def __init__(self, word: str, vector: Vector) -> None:
+        self.word = word
+        self.vector = vector
+
+    def __repr__(self) -> str:
+        vector_preview = ', '.join(map(str, self.vector[:2]))
+        return f"{self.word} [{vector_preview}, ...]"
+
+def vector_len(v: Vector) -> float:
+    return math.sqrt(sum([x*x for x in v]))
+
+def dot_product(v1: Vector, v2: Vector) -> float:
+    assert len(v1) == len(v2)
+    return sum([x*y for (x,y) in zip(v1, v2)])
+
+def cosine_similarity(v1: Vector, v2: Vector) -> float:
+    """Returns the cosine of the angle between the two vectors."""
+    return dot_product(v1, v2) / (vector_len(v1) * vector_len(v2))
+
+def load_words(file_name: str) -> List[Word]:
+    return [
+        Word('cat', [-0.3, 1.12, 3.1]),
+        Word('dog', [0.3, -0.6, -0.4])
+    ]
+
+print(vector_len([3, 4]))
+
+print(dot_product([2, 3], [-1, 7]))
+
+print(load_words('words-short.vec'))