SQLite Tutorial

Author: CoreyMSchafer

.gitignore

@@ -1,4 +1,6 @@
 .DS_Store
+__pycache__/
+*.pyc
 
 # Video Scripts
 s.txt

Python-SQLite/employee.db

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+
+class Employee:
+    """A sample Employee class"""
+
+    def __init__(self, first, last, pay):
+        self.first = first
+        self.last = last
+        self.pay = pay
+
+    @property
+    def email(self):
+        return '{}.{}@email.com'.format(self.first, self.last)
+
+    @property
+    def fullname(self):
+        return '{} {}'.format(self.first, self.last)
+
+    def __repr__(self):
+        return "Employee('{}', '{}', {})".format(self.first, self.last, self.pay)

Python-SQLite/employee.py

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+
+def insert_emp(emp):
+    pass
+
+
+def get_emps_by_name(lastname):
+    pass
+
+
+def update_pay(emp, pay):
+    pass
+
+
+def remove_emp(emp):
+    pass
+
+
+
+
+def update_pay(emp, pay):
+    with conn:
+        c.execute("""UPDATE employees SET pay = :pay
+                    WHERE first = :first AND last = :last""",
+                  {'first': emp.first, 'last': emp.last, 'pay': pay})
+
+
+def remove_emp(emp):
+    with conn:
+        c.execute("DELETE from employees WHERE first = :first AND last = :last",
+                  {'first': emp.first, 'last': emp.last})

Python-SQLite/snippets.txt

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+import sqlite3
+from employee import Employee
+
+conn = sqlite3.connect(':memory:')
+
+c = conn.cursor()
+
+c.execute("""CREATE TABLE employees (
+            first text,
+            last text,
+            pay integer
+            )""")
+
+
+def insert_emp(emp):
+    with conn:
+        c.execute("INSERT INTO employees VALUES (:first, :last, :pay)", {'first': emp.first, 'last': emp.last, 'pay': emp.pay})
+
+
+def get_emps_by_name(lastname):
+    c.execute("SELECT * FROM employees WHERE last=:last", {'last': lastname})
+    return c.fetchall()
+
+
+def update_pay(emp, pay):
+    with conn:
+        c.execute("""UPDATE employees SET pay = :pay
+                    WHERE first = :first AND last = :last""",
+                  {'first': emp.first, 'last': emp.last, 'pay': pay})
+
+
+def remove_emp(emp):
+    with conn:
+        c.execute("DELETE from employees WHERE first = :first AND last = :last",
+                  {'first': emp.first, 'last': emp.last})
+
+emp_1 = Employee('John', 'Doe', 80000)
+emp_2 = Employee('Jane', 'Doe', 90000)
+
+insert_emp(emp_1)
+insert_emp(emp_2)
+
+emps = get_emps_by_name('Doe')
+print(emps)
+
+update_pay(emp_2, 95000)
+remove_emp(emp_1)
+
+emps = get_emps_by_name('Doe')
+print(emps)
+
+conn.close()