Newby working my way through python and sql with mariadb.
Why wont this loop? It updates the first record only. Im pretty hack at this...
cursor1.execute("select recordid, mvavgvol, quote_usd_volume_change_24h from pumped")
records = cursor1.fetchall()
for x in records:
rid = (x[0])
m = (x[1])
o = (x[2])
if (m >= o):
result = 0
else:
result = 1
upd_data=(result,rid)
sql1 = ("UPDATE pumped SET mvavgvolcheck = %s WHERE recordid = %s")
cursor2.execute(sql1,upd_data)
conn.commit()
Since you are fetching multiple rows you have to store the fetched values in an array and use cursor's executemany() method instead.
✂
data= []
for x in records:
rid = (x[0])
result= int(x[1] > x[2])
data+= [(result, rid)]
cursor.executemany(UPDATE pumped SET mvavgvolcheck = %s WHERE recordid = %s", data);
✂
When using mariadb python module (MariaDB Connector/Python) this is much more effective since it reduces network traffic: instead of sending n update commands in a loop (where n is the number of rows in table pumped) only one command will be send to the server.
conn = msql.connect(host=Host,port=Port, user=User, password=Password, database=database)
cursor1 = conn.cursor()
cursor2 = conn.cursor()
cursor1.execute("select recordid, mvavgvol, quote_usd_volume_change_24h from pumped")
records = cursor1.fetchall()
for x in records:
rid = (x[0])
m = (x[1])
o = (x[2])
if (m >= o):
result = 0
cursor2.execute("UPDATE pumped SET mvavgvolcheck = %s WHERE recordid = %s",(result, rid))
conn.commit()
else:
result = 1
cursor2.execute("UPDATE pumped SET mvavgvolcheck = %s WHERE recordid = %s",(result, rid))
conn.commit()
I need to set some user meta in my wordpress through local python script. Hence I can't use the WP update_user_meta for it - it has to be done manually.
import mysql.connector as mysql
cnx = mysql.connect(host=HOST, database=DATABASE, user=USER, password=PASSWORD)
cursor = cnx.cursor()
get_meta = ("SELECT * FROM `ff_usermeta` WHERE `user_id`= 1 AND (`meta_key`='nickname' OR `meta_key`='info' OR `meta_key`='bg' OR `meta_key`='avatar' OR `meta_key`='profile_updated')")
cursor.execute(get_meta)
meta = cursor.fetchall()
#some processing of the result
cursor.execute(q, (...))
cnx.commit()
cursor.close()
cnx.close()
Now I need to check if the result has meta with each of the keys.
If the key already exists for this user, it needs to run UPDATE for this meta.
If this user still has no meta of this key, it has to INSERT new row.
if(there's no 'nickname' in meta_key on either of 5 or less rows):
q = ("INSERT INTO `ff_usermeta` ...")
else:
q = ("UPDATE `ff_usermeta` ...")
...and 4 more times like that?.. Seems like a good place for a cycle, but I don't really like the idea to make it 5x queues, especially since there might be more fields in the future.
I was thinking along the lines of searching the fetchall result for matches in meta_key, and if found, adding required data to one array, if not - to another. And then just running one update and one insert at the end, assuming both are not empty. If I were to write it in semi-php style, it would look roughly like this:
if(in_array("nickname", meta))
for_update .= "`nickname`='"+data[0]+"', "
else:
fields .= "`nickname`, "
vals .= "'"+data[0]+"', "
if(in_array("bg", meta)):
for_update .= "`bg`='"+data[1]+"', "
else:
fields .= "`bg`, "
vals .= "'"+data[1]+"', "
if(for_update):
update = ("UPDATE `ff_usermeta` SET "+for_update+" WHERE 1")
if(fields):
insert = ("INSERT INTO `ff_usermeta`("+fields+") VALUES ("+vals+")")
But absolutely no clue how to translate it correctly to python. I had to google it up to things like "why dot not working to add one string to another". Any advice? Or perhaps there is a better way? Thanks!
It is not complete, you can not update your rows in that way.
But with this you can start to make your query
The frist select gets exactly 1 row, if the user_id exists.
The user_id doesn't seem the right choice for this, but to get what you can do it is enough.
If the query doesn't have an entry, the it will insert some data you get from anywhere
The update as the insert are in that form wrong as you have to insert 5 new orws or update max 5 rows, but that is more for you to programm
import mysql.connector as mysql
HOST = "localhost"
DATABASE = ""
USER = "root"
PASSWORD = "mypassword"
cnx = mysql.connect(host=HOST, database=DATABASE, user=USER, password=PASSWORD)
cnx = mysql.connect(host=HOST, database=DATABASE, user=USER, password=PASSWORD)
cursor = cnx.cursor()
user_id = 1
get_meta = ("""SELECT umeta_id, user_id , MAX(IF( `meta_key`='nickname', meta_value,'')) AS 'nickname' , MAX(IF( `meta_key`='info', meta_value,'')) AS 'info' , MAX(IF( `meta_key`='bg', meta_value,'')) AS 'bg' , MAX(IF( `meta_key`='avatar', meta_value,''NULL'')) AS 'avatar' , MAX(IF (`meta_key`='profile_updated', meta_value,'')) AS 'profile_updated' FROM `ff_usermeta` WHERE `user_id`= %s GROUP BY umeta_id, user_id:""")
result = cursor.execute(get_meta,(user_id,))
if result > 0:
data = cursor.fetchone()
for_update = "";
#some processing of the result
if not data["nickname"]:
for_update += "`nickname`='"+data["nickname"]+"', "
if not data["bg"]:
for_update += "`bg`='"+data["bg"]+"', "
query = ("UPDATE `ff_usermeta` SET "+for_update+" WHERE user_id = " + user_id)
else:
#here are no data to be gathered as there is no user_id present add new user
nickname = ""
bg= ""
info = ""
avatar = ""
profile_updated = ""
fields= ""
vals = ""
fields += "`nickname`,`info`, `bg`,`avatar`,`profile_updated`"
vals += "'"+nickname+"', "+"'"+info+"', "+"'"+bg+"', "+"'"+avatar+"', "+"'"+profile_updatedfo+"'"
query = ("INSERT INTO `ff_usermeta`("+fields+") VALUES ("+vals+")")
cursor.execute(query)
cnx.commit()
cursor.close()
cnx.close()
I tried my best to adapt the suggestion above, but couldn't figure out how to make it work. Eventually I went another way, and it seems to work somehow, so I'll post the full code in case anyone would find it useful.
What it does: checks the queue in table with validation request, then parses a page (separate function) and updates user profile accodringly.
import mysql.connector as mysql
import time
from datetime import datetime
cnx = mysql.connect(host=HOST, database=DATABASE, user=USER, password=PASSWORD)
while True: #endless loop as a temporary scheduler
cursor = cnx.cursor()
#getting first request in the queue - 0: id, 1: url, 2: parse, 3: status, 4: user, 5: user_page, 6: req_date, 7: action
cursor.execute("SELECT * FROM `ff_qq` WHERE status = 0 LIMIT 1")
row = cursor.fetchone()
if row:
status = 1 #processed
if row[7] == "verify":
get_user = ("SELECT * FROM `ff_users` WHERE ID = %s LIMIT 1")
cursor.execute(get_user, (row[4],))
user = cursor.fetchone() #0 - ID, 5 - user_url, 8 - user_status, 9 - display_name
#separate function that returns data to insert into mysql
udata = verify(row) #0 - nickname, 1 - fb_av, 2 - fb_bg, 3 - fb_info, 4 - owner
ustat = row[1].split("/authors/")
if udata['owned'] or user[8] == ustat[1]:
update_user = ("UPDATE `ff_users` SET user_status = %s, display_name = %s, user_url = %s WHERE ID = %s LIMIT 1")
cursor.execute(update_user, (ustat[1], udata['nickname'], row[1], user[0]))
status = 2 #success
get = ("SELECT `meta_value` FROM `ff_usermeta` WHERE `user_id`= %s AND `meta_key`='ff_capabilities' LIMIT 1")
cursor.execute(get, (row[4],))
rights = cursor.fetchone()
if rights == 'a:1:{s:10:"subscriber";b:1;}':
promote = ("UPDATE `ff_usermeta` SET `meta_value` = 'a:1:{s:6:\"author\";b:1;}' "
"WHERE `user_id` = %s AND `meta_key`='ff_capabilities' LIMIT 1")
cursor.execute(promote, (row[0],))
#list of meta_key values in same order as returned data
ff = ['nickname', 'fb_av', 'fb_bg', 'fb_info']
for x in range(0,3): #goes through each one of the above list
if udata[ff[x]]: #yes this actually works, who would've thought?..
#current meta_key added directly into the string
get = ("SELECT `meta_value` FROM `ff_usermeta` WHERE `user_id`= %s AND `meta_key`='" + ff[x] + "' LIMIT 1")
cursor.execute(get, (row[4],))
meta = cursor.fetchone()
if(meta): #update if it exists, otherwise insert new row
qq = ("UPDATE `ff_usermeta` SET `meta_value` = %s "
"WHERE `user_id` = %s AND `meta_key`='" + ff[x] + "' LIMIT 1")
else:
qq = ("INSERT INTO `ff_usermeta`(`meta_value`, `meta_key`, `user_id`) "
"VALUES ('%s','" + ff[x] + "','%s'")
cursor.execute(qq, (udata[ff[x]], row[0])) #same execute works for both
else:
status = 3 #verification failed
#update queue to reflect its status
update = ("UPDATE `ff_qq` SET status = %s WHERE id = %s LIMIT 1")
cursor.execute(update, (status, row[0]))
cnx.commit()
cursor.close()
now = datetime.now()
print(now.strftime("%d.%m.%Y %H:%M:%S"))
time.sleep(180) #sleep until it's time to re-check the queue
cnx.close()
I need to be able to input a users full name in an entry box and then have it split into a firstname and surname variable, so that these variables can be used to search a database for. However, I'm having issues with this, as it is something I haven't really done before. Any help is appreciated.
studentname = (StudName.get())
conn = sqlite3.connect('MyComputerScience.db')
c = conn.cursor()
firstName, lastName = studentname.split()
namesearchadd = (firstname, lastname,)
c.execute ("SELECT * FROM users WHERE FName = ? and SName= ? VALUES (?,?);", (namesearchadd,))
data = c.fetchall()
if len(data) == 0:
print ("whoops")
else:
Label(screen6, text = "Success", fg="GREEN").place(relx=0.101, rely=0.725, height=21, width=194)
firstName, lastName = studentname.split()
ValueError: not enough values to unpack (expected 2, got 0)
def amendStaff():
global STAFFIDVar,STAFF_FORENAMEVar,STAFF_SURNAMEVar,STAFF_DOBVar,STAFF_CONTACTVar,STAFF_EMAILVar,STAFF_ADDRESSVar,STAFF_POSTCODEVar
#getting the variable from the entry form
STAFFID=STAFFIDVar.get()
STAFF_FORENAME = STAFF_FORENAMEVar.get()
STAFF_SURNAME = STAFF_SURNAMEVar.get()
STAFF_DOB = STAFF_DOBVar.get()
STAFF_CONTACT = STAFF_CONTACTVar.get()
STAFF_EMAIL = STAFF_EMAILVar.get()
STAFF_ADDRESS = STAFF_ADDRESSVar.get()
STAFF_POSTCODE = STAFF_POSTCODEVar.get()
conn=sqlite3.connect('Database.db') #opens the database
cursor = conn.execute('SELECT * FROM STAFF')
cursor.execute('UPDATE STAFF SET STAFF_FORENAME = ? ,STAFF_SURNAME=? ,STAFF_DOB = ? , STAFF_CONTACT=? ,STAFF_EMAIL=?, STAFF_ADDRESS=? ,STAFF_POSTCODE=? WHERE STAFFID = ?', (STAFFID,STAFF_FORENAME,STAFF_SURNAME,STAFF_DOB,STAFF_CONTACT,STAFF_EMAIL,STAFF_ADDRESS,STAFF_POSTCODE))
#amends the record
conn.commit() #saves the changes
conn.close() #closes the database
messagebox.showinfo("DATABASE ACTION",str("Record Updated"))
The parameters in the update are out of order with the staffid first where it should be last.
The parameters on the last cur.execute statement aren't working.
The below code doesn't error out but cur.fetchone() return rows of value (0,) when they shouldn't
with conn:
flag = 0
today = (datetime.date.today() - datetime.timedelta(20)).strftime("%Y-%m-%d")
prev_prev_day = (datetime.date.today() - datetime.timedelta(22)).strftime("%Y-%m-%d")
cur = conn.cursor()
cur.execute("SELECT EXISTS(SELECT user, COUNT(user) cnt FROM logins GROUP BY user HAVING cnt > 1)")
if cur.fetchone()[0] == 1:
flag + 1
cur.execute("SELECT user, COUNT(user) cnt FROM logins GROUP BY user HAVING cnt > 1")
for item in cur.fetchall():
variables = (item[0], today, prev_prev_day,)
# problem in with this statement
cur.execute("SELECT COUNT(*) FROM logins WHERE user = ? AND seen_date BETWEEN ? AND ?", variables)
print cur.fetchone()
I get the right results with:
cur.execute("SELECT COUNT(*) FROM logins WHERE user = ? AND seen_date BETWEEN '2015-07-11' AND '2015-07-13'", variables)
...while only inserting the user = ? variable.
Update: Simply switch your between parameters.
This:
variables = (item[0], today, prev_prev_day,)
Should be:
variables = (item[0], prev_prev_day, today)