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import matplotlib.pyplot as plt
import pandas as pd
import os
import logging
import time
class ChartGenerator:
def __init__(self, data=None):
logging.info("Initializing ChartGenerator")
if data is not None:
self.data = data
else:
self.data = pd.read_excel(os.path.join(os.path.dirname(os.path.dirname(__file__)), 'data', 'sample_data.xlsx'))
def generate_chart(self, plot_args):
start_time = time.time()
logging.info(f"Generating chart with arguments: {plot_args}")
fig, ax = plt.subplots()
for y in plot_args['y']:
color = plot_args.get('color', None)
if plot_args.get('chart_type', 'line') == 'bar':
ax.bar(self.data[plot_args['x']], self.data[y], label=y, color=color)
else:
ax.plot(self.data[plot_args['x']], self.data[y], label=y, color=color)
ax.set_xlabel(plot_args['x'])
ax.legend()
chart_filename = 'chart.png'
output_dir = os.path.join(os.path.dirname(os.path.dirname(__file__)), 'static', 'images')
if not os.path.exists(output_dir):
os.makedirs(output_dir)
full_path = os.path.join(output_dir, chart_filename)
if os.path.exists(full_path):
os.remove(full_path)
plt.savefig(full_path)
logging.info(f"Chart generated and saved to {full_path}")
return os.path.join('static', 'images', chart_filename) |