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🎨 Palette: [UX improvement] Add thousands separators to numerical CLI outputs #130

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🎨 Palette: [UX improvement] Add thousands separators to numerical CLI outputs #130

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b7fba00
Add thousands separators to numerical CLI outputs
google-labs-jules[bot] Apr 10, 2026
2461212
Add thousands separators and fix CI Python build error
google-labs-jules[bot] Apr 10, 2026
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4 changes: 4 additions & 0 deletions .Jules/palette.md
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Expand Up @@ -12,3 +12,7 @@
## 2025-03-23 - Game Key Scrolling
**Learning:** Browsers natively scroll the page when users press Space or Arrow keys. When building a web-based game, this creates a frustrating UX where the game viewport jumps around while playing.
**Action:** Always call `e.preventDefault()` on keydown events for typical game controls ("Space", "ArrowUp", etc.) when the focus is on a game container or the body.

## 2026-04-10 - Thousands Separators for Numerical Output
**Learning:** Dense numerical data (like $10000.00) in CLI output is hard to parse and increases cognitive load. Adding thousands separators ($10,000.00) significantly improves readability and the perceived quality of the tool.
**Action:** Always use thousands separators (e.g., `:,.2f` in Python) when formatting large numerical or financial values in CLI outputs.
8 changes: 4 additions & 4 deletions bitcoin_trading_simulation.py
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Expand Up @@ -102,22 +102,22 @@ def simulate_trading(signals, initial_cash=10000, quiet=False):
portfolio.loc[i, 'btc'] += btc_to_buy
portfolio.loc[i, 'cash'] -= btc_to_buy * row['price']
if not quiet:
print(f"{Colors.GREEN}🟢 Day {i}: Buy {btc_to_buy:.4f} BTC at ${row['price']:.2f}{Colors.ENDC}")
print(f"{Colors.GREEN}🟢 Day {i}: Buy {btc_to_buy:,.4f} BTC at ${row['price']:,.2f}{Colors.ENDC}")

# Sell signal
elif row['positions'] == -2.0:
if portfolio.loc[i, 'btc'] > 0:
cash_received = portfolio.loc[i, 'btc'] * row['price']
portfolio.loc[i, 'cash'] += cash_received
if not quiet:
print(f"{Colors.FAIL}🔴 Day {i}: Sell {portfolio.loc[i, 'btc']:.4f} BTC at ${row['price']:.2f}{Colors.ENDC}")
print(f"{Colors.FAIL}🔴 Day {i}: Sell {portfolio.loc[i, 'btc']:,.4f} BTC at ${row['price']:,.2f}{Colors.ENDC}")
portfolio.loc[i, 'btc'] = 0

portfolio.loc[i, 'total_value'] = portfolio.loc[i, 'cash'] + portfolio.loc[i, 'btc'] * row['price']

if not quiet:
print(f"Day {i}: Portfolio Value: ${portfolio.loc[i, 'total_value']:.2f}, "
f"Cash: ${portfolio.loc[i, 'cash']:.2f}, BTC: {portfolio.loc[i, 'btc']:.4f}")
print(f"Day {i}: Portfolio Value: ${portfolio.loc[i, 'total_value']:,.2f}, "
f"Cash: ${portfolio.loc[i, 'cash']:,.2f}, BTC: {portfolio.loc[i, 'btc']:,.4f}")

if quiet and sys.stdout.isatty():
print()
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1 change: 0 additions & 1 deletion requirements.txt
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@@ -1,4 +1,3 @@
numpy
pandas
requests
venv
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