Converting Pandas DataFrame to a table of hourly blocks

[snippsat]

Can do it like this,it's a little tricky to get CSS placement right.
Generate a schedule.html

import pandas as pd

df = pd.DataFrame({
    'courseid':    ['CHEM1250', 'CHEM1250', 'CHEM1250',
                    'PHYS1200', 'PHYS1200',
                    'BIOL1150', 'BIOL1150'],
    'coursesec':   ['L01', 'L02', 'L03',
                    'L01', 'L02',
                    'L01', 'L01'],
    'Day':         ['Monday', 'Tuesday', 'Friday',
                    'Tuesday', 'Thursday',
                    'Wednesday', 'Wednesday'],
    'starttime':   ['8:00', '12:00', '13:00',
                    '9:00', '11:00',
                    '8:00', '13:00'],
    'endtime':     ['9:30', '12:30', '14:00',
                    '10:30', '12:00',
                    '9:30', '14:30'],
    'instructorid':['John', 'John', 'Bob',
                    'Jenna', 'Michel',
                    'Michel', 'Alice']
})

# Create blank grid: index = 08:00–22:00 in 30-min steps, columns = Monday–Friday
times = pd.date_range("08:00", "22:00", freq="30min").time
time_slots = [t.strftime("%H:%M") for t in times]
days = ["Monday", "Tuesday", "Wednesday", "Thursday", "Friday"]
grid = pd.DataFrame("", index=time_slots, columns=days)

# Fill each time slot with the course info
for _, row in df.iterrows():
    slots = pd.date_range(row.starttime, row.endtime, freq="30min").time
    # drop the end slot so that 9:30–10:00 goes into the 9:30 row, etc.
    slots = [t.strftime("%H:%M") for t in slots[:-1]]
    text = f"{row.courseid} {row.coursesec}<br>Instructor: {row.instructorid}"
    grid.loc[slots, row.Day] = text

# Turn the time‐index into a real column named "Time" and hide the integer index
grid = grid.rename_axis("Time").reset_index()
def bg_color(val):
    if "CHEM" in val:
        return "background-color: #d1ecf1;"
    if "PHYS" in val:
        return "background-color: #f8d7da;"
    if "BIOL" in val:
        return "background-color: #fff3cd;"
    return ""

# Define table & cell border styles
table_styles = [
    {"selector":"table", "props": [("border-collapse", "collapse"), ("width", "100%")]},
    {"selector":"th, td", "props": [("border", "1px solid #ccc"), ("padding", "6px"), ("vertical-align", "top")]},
    {"selector":"th", "props": [("background-color", "#fafafa"), ("font-weight", "bold")]},
]

# Build the Styler
styler = (
    grid.style
        .map(bg_color)
        .set_table_styles(table_styles)
        .set_caption("Weekly Schedule")
        .hide(axis="index")
)

# Export to HTML
html = styler.to_html(escape=False)
with open("schedule.html", "w", encoding="utf-8") as f:
    f.write(html)

print("✅ schedule.html generated")