pyfetch-mimic 0.0.3

This is a module that mimics pyodide.http.pyfetch to enable simpler development by using one set of http calls for both local and pyodide executions.

pyfetch-mimic

• This is a simple module that mimicks pyodide.http.pyfetch to make local development for shinylive projects easier. It may work with pyodide in general, but that use case hasn't been tested.

How to use wrapper

• Include the following conditional import statement at the beginning of the module that will use http.pyfetch:

  if "pyodide" in sys.modules:
      from pyodide import http
  else:
      from pyfetch_mimic import http
  

• Use http.pyfetch as usual
• NOTE: The wrapper is a work in progress and does not support all use case variations yet. It will be updated as need arises.

pyfetch examples

# Download, save extracted file to local virtual fs
if "pyodide" in sys.modules:
    from pyodide import http
else:
    from pyfetch_mimic import http

response = await pyfetch("https://some_url/myfiles.zip")
await response.unpack_archive()

# Download text file to local virtual fs, load into pandas
if "pyodide" in sys.modules:
    from pyodide import http
else:
    from pyfetch_mimic import http

response = await pyodide.http.pyfetch(url())

with open("test.json", mode="wb") as file:
    file.write(await response.bytes())

df = pd.read_json("test.json")

# Download text file into BytesIO memory buffer, load into pandas
from io import BytesIO
if "pyodide" in sys.modules:
    from pyodide import http
else:
    from pyfetch_mimic import http

response = await pyodide.http.pyfetch(url())
buf = BytesIO(await response_c.bytes())

df = pd.read_json(buf)

Install Test Dependencies

• pip install -e '.[tests]'

Run regular tests (verifes test endpoints and tests pyfetch-mimic)

• activate venv: source venv/bin/activate
• start fastapi app: python3 src_test_webserver/main.py
• run pytest: pytest -vv -x test

Run pyodide tests with pyfetch calls written identical to pyfetch-mimc

• activate venv and start fastapi like above
• export shinylive app: shinylive export ./test/tests_shinylive ./src_test_webserver/shinyapps
• open shinylive app in edit mode: http://localhost8000/apps/edit/
• Click "Run tests"
• If all function names at the bottom are followed by "passed", then everything should be ok