"""Detection of running platform and viewers' backend"""
import os
# Define possible backends
backends = ["python", "jupyter notebook", "streamlit"]
[docs]
def set_backend(backend):
"""Modify current backend and relevant internal variables"""
global current_backend
if backend not in backends:
raise TypeError(f'Backend "{backend}" not supported.Choose from {backends}')
try:
import pyvista as pv
if backend == "python":
pv.set_jupyter_backend(None)
elif backend == "jupyter notebook":
pv.set_jupyter_backend("trame")
if "SESSION_URL" in os.environ:
pv.global_theme.trame.server_proxy_enabled = True
session = os.environ["SESSION_URL"]
session = session.lstrip("https://")
s = session.split("/")
s = "/" + "/".join(s[1:] + ["proxy/"])
pv.global_theme.trame.server_proxy_prefix = s
elif backend == "streamlit":
pv.set_jupyter_backend("trame")
except ImportError:
pass
current_backend = backend
# Define current backend
current_backend = "python"
# Check if running inside Jupyter Notebook, change backend if so
try:
shell = get_ipython().__class__.__name__ # type: ignore
if shell == "ZMQInteractiveShell":
set_backend("jupyter notebook")
except NameError:
pass
# Check if running inside Streamlit, change backend if so
try:
from streamlit.runtime.scriptrunner import get_script_run_ctx
if get_script_run_ctx(suppress_warning=True):
set_backend("streamlit")
except ModuleNotFoundError:
pass