Prettify sql statement (#5)

database.py

@@ -10,7 +10,7 @@ def list_users():
     _conn = sqlite3.connect(user_db_file_location)
     _c = _conn.cursor()
 
-    _c.execute("select id from users;")
+    _c.execute("SELECT id FROM users;")
     result = [x[0] for x in _c.fetchall()]
 
     _conn.close()
@@ -21,7 +21,7 @@ def verify(id, pw):
     _conn = sqlite3.connect(user_db_file_location)
     _c = _conn.cursor()
 
-    _c.execute("select pw from users where id = '" + id + "';")
+    _c.execute("SELECT pw FROM users WHERE id = '" + id + "';")
     result = _c.fetchone()[0] == hashlib.sha256(pw.encode()).hexdigest()
     
     _conn.close()
@@ -31,23 +31,23 @@ def verify(id, pw):
 def delete_user_from_db(id):
     _conn = sqlite3.connect(user_db_file_location)
     _c = _conn.cursor()
-    _c.execute("delete from users where id = '" + id + "';")
+    _c.execute("DELETE FROM users WHERE id = '" + id + "';")
     _conn.commit()
     _conn.close()
 
-    # when we delete a user from database USERS, we also need to delete all his or her notes data from database NOTES
+    # when we delete a user FROM database USERS, we also need to delete all his or her notes data FROM database NOTES
     _conn = sqlite3.connect(note_db_file_location)
     _c = _conn.cursor()
-    _c.execute("delete from notes where user = '" + id + "';")
+    _c.execute("DELETE FROM notes WHERE user = '" + id + "';")
     _conn.commit()
     _conn.close()
 
-    # when we delete a user from database USERS, we also need to 
+    # when we delete a user FROM database USERS, we also need to 
-    # [1] delete all his or her images from image pool (done in app.py)
+    # [1] delete all his or her images FROM image pool (done in app.py)
-    # [2] delete all his or her images records from database IMAGES
+    # [2] delete all his or her images records FROM database IMAGES
     _conn = sqlite3.connect(image_db_file_location)
     _c = _conn.cursor()
-    _c.execute("delete from images where owner = '" + id + "';")
+    _c.execute("DELETE FROM images WHERE owner = '" + id + "';")
     _conn.commit()
     _conn.close()
 
@@ -55,7 +55,7 @@ def add_user(id, pw):
     _conn = sqlite3.connect(user_db_file_location)
     _c = _conn.cursor()
 
-    _c.execute("insert into users values(?, ?)", (id.upper(), hashlib.sha256(pw.encode()).hexdigest()))
+    _c.execute("INSERT INTO users values(?, ?)", (id.upper(), hashlib.sha256(pw.encode()).hexdigest()))
     
     _conn.commit()
     _conn.close()
@@ -64,7 +64,7 @@ def read_note_from_db(id):
     _conn = sqlite3.connect(note_db_file_location)
     _c = _conn.cursor()
 
-    command = "select note_id, timestamp, note from notes where user = '" + id.upper() + "';" 
+    command = "SELECT note_id, timestamp, note FROM notes WHERE user = '" + id.upper() + "';" 
     _c.execute(command)
     result = _c.fetchall()
 
@@ -78,7 +78,7 @@ def match_user_id_with_note_id(note_id):
     _conn = sqlite3.connect(note_db_file_location)
     _c = _conn.cursor()
 
-    command = "select user from notes where note_id = '" + note_id + "';" 
+    command = "SELECT user FROM notes WHERE note_id = '" + note_id + "';" 
     _c.execute(command)
     result = _c.fetchone()[0]
 
@@ -92,7 +92,7 @@ def write_note_into_db(id, note_to_write):
     _c = _conn.cursor()
 
     current_timestamp = str(datetime.datetime.now())
-    _c.execute("insert into notes values(?, ?, ?, ?)", (id.upper(), current_timestamp, note_to_write, hashlib.sha1((id.upper() + current_timestamp).encode()).hexdigest()))
+    _c.execute("INSERT INTO notes values(?, ?, ?, ?)", (id.upper(), current_timestamp, note_to_write, hashlib.sha1((id.upper() + current_timestamp).encode()).hexdigest()))
 
     _conn.commit()
     _conn.close()
@@ -101,7 +101,7 @@ def delete_note_from_db(note_id):
     _conn = sqlite3.connect(note_db_file_location)
     _c = _conn.cursor()
 
-    command = "delete from notes where note_id = '" + note_id + "';" 
+    command = "DELETE FROM notes WHERE note_id = '" + note_id + "';" 
     _c.execute(command)
 
     _conn.commit()
@@ -111,7 +111,7 @@ def image_upload_record(uid, owner, image_name, timestamp):
     _conn = sqlite3.connect(image_db_file_location)
     _c = _conn.cursor()
 
-    _c.execute("insert into images values (?, ?, ?, ?)", (uid, owner, image_name, timestamp))
+    _c.execute("INSERT INTO images VALUES (?, ?, ?, ?)", (uid, owner, image_name, timestamp))
 
     _conn.commit()
     _conn.close()
@@ -120,7 +120,7 @@ def list_images_for_user(owner):
     _conn = sqlite3.connect(image_db_file_location)
     _c = _conn.cursor()
 
-    command = "select uid, timestamp, name from images where owner = '{0}'".format(owner)
+    command = "SELECT uid, timestamp, name FROM images WHERE owner = '{0}'".format(owner)
     _c.execute(command)
     result = _c.fetchall()
 
@@ -134,7 +134,7 @@ def match_user_id_with_image_uid(image_uid):
     _conn = sqlite3.connect(image_db_file_location)
     _c = _conn.cursor()
 
-    command = "select owner from images where uid = '" + image_uid + "';" 
+    command = "SELECT owner FROM images WHERE uid = '" + image_uid + "';" 
     _c.execute(command)
     result = _c.fetchone()[0]
 
@@ -147,7 +147,7 @@ def delete_image_from_db(image_uid):
     _conn = sqlite3.connect(image_db_file_location)
     _c = _conn.cursor()
 
-    command = "delete from images where uid = '" + image_uid + "';" 
+    command = "DELETE FROM images WHERE uid = '" + image_uid + "';" 
     _c.execute(command)
 
     _conn.commit()
@@ -160,4 +160,4 @@ def delete_image_from_db(image_uid):
 
 
 if __name__ == "__main__":
-    print(list_users())
+    print(list_users())