Google Colab is not recognized as "notebook" by quantstats

[daviddwlee84]

Currently, using quantstats.report.html in Google Colab cannot recognize it as a Jupyter Notebook session.
So we need to set an output file and display it manually:

# Workaround
import quantstats as qs
from IPython.display import display, HTML
returns = qs.utils.download_returns('META')
qs.reports.html(returns, "SPY", output='META_versus_SPY.html')
display(HTML(filename='META_versus_SPY.html'))

quantstats/quantstats/reports.py

Lines 54 to 71 in fa0a91a

	def html(
	returns,
	benchmark=None,
	rf=0.0,
	grayscale=False,
	title="Strategy Tearsheet",
	output=None,
	compounded=True,
	periods_per_year=252,
	download_filename="quantstats-tearsheet.html",
	figfmt="svg",
	template_path=None,
	match_dates=True,
	**kwargs,
	):
	if output is None and not _utils._in_notebook():
	raise ValueError("`output` must be specified")

quantstats/quantstats/utils.py

Lines 293 to 309 in fa0a91a

	def _in_notebook(matplotlib_inline=False):
	"""Identify enviroment (notebook, terminal, etc)"""
	try:
	shell = get_ipython().__class__.__name__
	if shell == "ZMQInteractiveShell":
	# Jupyter notebook or qtconsole
	if matplotlib_inline:
	get_ipython().magic("matplotlib inline")
	return True
	if shell == "TerminalInteractiveShell":
	# Terminal running IPython
	return False
	# Other type (?)
	return False
	except NameError:
	# Probably standard Python interpreter
	return False