added sql stuff

Freitag/db_select.py

@@ -0,0 +1,45 @@
+#! /usr/bin/env python3
+#
+#Benötigt python3-pymysql
+# mysql -h notebook14 -u python -pvilla inventory
+import sys
+import pymysql
+
+from utilities import hide_exception
+
+def db_connect(credentials: dict):
+    connection = pymysql.connect(**credentials)
+    return connection
+
+# Passwort aus Konfigiruationsdaten lesen
+credentials = dict(
+    host = 'notebook14', 
+    user = 'python',
+    password = 'villa',
+    database = 'inventory'
+)
+
+
+def list_hosts(connection):
+    cursor = connection.cursor()
+    sql =   """
+            SELECT name, domain, address 
+            FROM hosts 
+            ORDER BY name
+            """
+    cursor.execute(sql)
+    #ermittlung cursor.fetchone() eine Zeile cursor.fetchmany() gibt vile in einer Zeile 
+    # cursor ist Iterator
+    #test = [row for row in cursor]
+    for row in cursor:
+        print("{0:20} {2:23} {1:15}".format(*row))
+
+
+#Connection
+def main():
+    db = db_connect(credentials)
+    list_hosts(db)
+    db.close()
+
+
+hide_exception(main)