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import streamlit as st
import pandas as pd
import plotly.figure_factory as ff
import random
from datetime import datetime, timedelta
def generate_random_color():
r = random.randint(0, 255)
g = random.randint(0, 255)
b = random.randint(0, 255)
return f'rgb({r}, {g}, {b})'
st.set_page_config(layout="wide")
st.title("Project Schedule/Gantt Chart Generator")
project_name = st.text_input("Project Name:")
start_date = st.date_input("Project Start Date:", value=datetime.today())
end_date = st.date_input("Project End Date:", value=datetime.today() + timedelta(days=30))
num_activities = st.number_input("Number of Activities (Minimum 1):", min_value=1, value=5)
activities = [] # Corrected line 22: Placed outside the loop
for i in range(num_activities):
col1, col2 = st.columns(2)
with col1:
activity_name = st.text_input(f"Activity {i+1} Name:", key=f"name_{i}")
with col2:
activity_duration = st.number_input(f"Activity {i+1} Duration (days):", min_value=1, key=f"duration_{i}")
activities.append({"Task": activity_name, "Duration": activity_duration})
if st.button("Create Gantt Chart"):
if not project_name:
st.error("Please enter a project name.")
elif any(not activity["Task"] for activity in activities):
st.error("Please enter names for all activities.")
elif start_date > end_date:
st.error("Start date cannot be after end date.")
else:
try:
df = pd.DataFrame(activities)
df['Start'] = pd.to_datetime(start_date)
df['Finish'] = df['Start']
for i in range(len(df)):
if i > 0:
df.loc[i, 'Start'] = df.loc[i - 1, 'Finish']
df.loc[i, 'Finish'] = df.loc[i, 'Start'] + pd.to_timedelta(df.loc[i, 'Duration'], unit='D')
df['Start_str'] = df['Start'].dt.strftime('%Y-%m-%d')
df['Finish_str'] = df['Finish'].dt.strftime('%Y-%m-%d')
data = []
for _, row in df.iterrows():
data.append(dict(Task=row['Task'], Start=row['Start_str'], Finish=row['Finish_str']))
fig = ff.create_gantt(data, colors=[generate_random_color() for _ in range(len(df))],
index_col='Task', show_colorbar=False, group_tasks=True, bar_width=0.4,
showgrid_x=True, showgrid_y=True)
fig.update_layout(title_text=f"Gantt Chart for: {project_name}", title_x=0.5,
margin=dict(l=20, r=20, t=60, b=20),
xaxis=dict(range=[start_date, end_date]),
height=600)
fig.update_yaxes(autorange="reversed")
st.plotly_chart(fig, use_container_width=True)
except Exception as e:
st.error(f"An error occurred during chart creation: {e}") |