Fix ValueError when comparing Series with scalar (Issue #448)

[ranaroussi]

Summary

• Fixed _get_baseline_value() function to properly handle both DataFrame and Series inputs
• Resolves ValueError: "The truth value of a Series is ambiguous" when generating HTML reports
• Cleaned up temporary test files

Problem

When calling qs.reports.html() with certain data, the code would fail with a ValueError in the _get_baseline_value() function. The issue occurred because prices.iloc[0] can return either a scalar (when prices is a Series) or a Series (when prices is a DataFrame), but the code was trying to compare this directly with numeric values.

Solution

Added proper type checking to handle both cases:

• When prices is a DataFrame, iloc[0] returns a Series, so we need an additional .iloc[0] to get the scalar value
• When prices is a Series, iloc[0] returns a scalar directly

Test plan

• Reproduced the issue with the example from Issue ValueError: The truth value of a Series is ambiguous. Use a.empty, a.bool(), a.item(), a.any() or a.all(). #448
• Verified the fix resolves the error
• Ran existing drawdown tests to ensure no regression
• Tested with both Series and DataFrame inputs

Fixes #448

🤖 Generated with Claude Code

[Copilot]

Pull Request Overview

This PR fixes a ValueError that occurred when generating HTML reports with certain data types. The issue was in the _get_baseline_value() function which didn't properly handle cases where prices.iloc[0] could return either a scalar (Series input) or a Series (DataFrame input).

• Fixed type checking in _get_baseline_value() to handle both DataFrame and Series inputs correctly
• Updated version number to 0.0.68
• Added changelog entry documenting the fix

Reviewed Changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated 3 comments.

File	Description
quantstats/stats.py	Added type checking to handle DataFrame vs Series inputs in _get_baseline_value() function
quantstats/version.py	Bumped version from 0.0.67 to 0.0.68
CHANGELOG.md	Added entry for version 0.0.68 documenting the fix
test_*.py files	Removed temporary test files used during development