Написал на питоне создание графиков. Без использования сторонних сервисов

chart/chart.py

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+import os
+import psycopg2
+import uvicorn
+import yaml
+import matplotlib.pyplot as plt
+from fastapi import FastAPI, Response, status
+from psycopg2.extras import DictCursor
+from starlette.staticfiles import StaticFiles
+
+app = FastAPI()
+
+config = yaml.safe_load(open('../config.yaml'))
+
+con = psycopg2.connect(host=config['database']['host'],
+                       user=config['database']['user'],
+                       password=config['database']['password'],
+                       database=config['database']['name'],
+                       port=config['database']['port'])
+
+cur = con.cursor(cursor_factory=DictCursor)
+con.autocommit = True
+
+app.mount('/static/charts', StaticFiles(directory='../charts/'))
+
+
+@app.get("/api/getChart/")
+async def get_chart(response: Response,
+                    from_currency: str, conv_currency: str,
+                    start_date: str, end_date: str):
+    """
+    :param response:
+    :param from_currency: The currency to convert from
+    :type from_currency: str
+    :param conv_currency: The currency to be converted into
+    :type conv_currency: str
+    :param start_date: The start date of the schedule period
+    :type start_date: str
+    :param end_date: The last date of the schedule period
+    :type end_date: str
+    :return:
+    """
+    cur.execute('SELECT date, rate FROM currency WHERE (date BETWEEN %s AND %s) '
+                'AND from_currency = %s AND conv_currency = %s ORDER BY date',
+                [
+                    start_date, end_date,
+                    from_currency.upper(), conv_currency.upper()
+                ])
+    con.commit()
+    data = cur.fetchall()
+
+    if not data:
+        response.status_code = status.HTTP_404_NOT_FOUND
+        return {'message': 'No data found', 'status_code': status.HTTP_404_NOT_FOUND}
+
+    date, rate = [], []
+
+    for i in range(len(data)):
+        date.append(str(data[i][0]))
+        rate.append(data[i][1])
+
+    if rate[0] < rate[-1]:
+        plt.plot(date, rate, color='green')
+    elif rate[0] > rate[-1]:
+        plt.plot(date, rate, color='red')
+    else:
+        plt.plot(date, rate, color='grey')
+
+    plt.xlabel('Date')
+    plt.ylabel('Rate')
+
+    fig = plt.gcf()
+    fig.set_size_inches(18.5, 9.5)
+
+    if not os.path.exists('../charts'):
+        os.mkdir('../charts')
+
+    fig.savefig(f'../charts/{from_currency}-{conv_currency}.png')
+    fig.clear()
+
+    return {'message': f'./static/charts/{from_currency}-{conv_currency}.png',
+            'status_code': status.HTTP_201_CREATED,
+            }
+
+
+if __name__ == '__main__':
+    uvicorn.run(app,
+                host=config['server']['host'],
+                port=3030,
+                ssl_keyfile=config['server']['ssl']['private_key']
+                if config['server']['ssl']['work']
+                else None,
+                ssl_certfile=config['server']['ssl']['cert']
+                if config['server']['ssl']['work']
+                else None
+                )