I'm running into an issue with the peewee regexp function. Queries like this work the first time I run it:
query = Table.select().where(Table.column.regexp('string'))
However, if I try to run it with a different string, I get this error: 'unicode' object has no attribute 'regexp':
query = Table.select().where(Table.column.regexp('string2'))
I usually run it twice because I need to see how specific to make the regexp string.
I've tried disconnecting/reconnecting to the db, but that doesn't help. The only thing that works is if I close ipython and restart it. Is this a memory/buffer issue? Is there a good way to get this to work? Thanks in advance.
Related
I'm writing code that takes a user-inputted string and binds it to a SQLite command through a parameter.
I've gotten this functionality to work when the string is already embedded in the query (see first example under "these lines do work"), and this binding method works with integers just fine (see second example).
testname = "\"EJtheDJ\"" #this would be user-inputted, but I get the same issue when I initialize it this way
#this line doesn't work
c.execute("select lastfm from usernames where discordname=?", (testname,))
#these lines do work
#c.execute("select lastfm from usernames where discordname=\"EJtheDJ\"")
#c.execute("select integer1 from test where integer2=?", (num,)) #num=3
print(c.fetchone()) #prints out "None"
My syntax seems 100% correct according to all the tutorials and forum threads I've looked at. I don't normally make posts here (in fact this is my first time), but I'm completely stumped on this and felt it was my only option. Any help would be massively appreciated. I'm running this on a CentOS server with Python 3.6, if that helps.
Edit: Turns out I just needed to do away with the escaped quotes. testname = EJtheDJ works perfectly.
I am looking to implement full text search in my python application using pymongo. I have been looking at this question but for some reason I am unable to implement this in my project as I am getting an error no such cmd: text. Can anyone direct me on what I am doing wrong?
Here is my code:
db = client.test
collection = db.videos
def search_for_videos(self, search_text)
self.db.command("text", "videos",
search=search_text,
limit=10)
The collection I am trying to search is called videos however I am not sure if I am putting this in the correct parameter, and I also am not sure if I need the line project={"name": 1, "_id": 0}.
The documentation here I believe is using the mongo shell to execute commands, however I wish to perform this action in my code.
I have looked at using the db.videos.find() function, but cannot seem to implement it correctly either.
How to I use PyMongo Full Text Search from my Python Code?
First be sure that you have a text index created on the field as mentioned here or you can just do it with pymongo too :
collection.create_index([('your field', 'text')])
Using pymongo you can do this to search:
collection.find({"$text": {"$search": your search}})
your function should look like this:
def search_for_videos(search_text):
collection.find({"$text": {"$search": search_text}}).limit(10)
I hope this helps you.
First create a text index based on the field you want to do the search on.
from pymongo import TEXT
db = MongoClient('localhost',port = 27017).DBNAME
db.collection.create_index([('FIELD_NAME',TEXT)],default_language ="english")
once you create the text index use the following query to search text. Depending on the size of your database, it might take long to create the text index.
db.collection.find({"$text": {"$search": your search}})
I have the following sql query:
SELECT
pc.patente,
cs.cpc_group_codigo_cpc_group
FROM
patente_pc pc
,
patente_cpc cpc,
cpc_subgroup cs,
cpc_group cg
WHERE
pc.codigo_patente_pc = cpc.patente_pc_codigo_patente_pc AND
cpc.cpc = cs.codigo_cpc_subgroup AND
cs.cpc_group_codigo_cpc_group = cg.codigo_cpc_group
GROUP BY
pc.patente, cs.cpc_group_codigo_cpc_group
I add this query to python, separating line by line the string in a tuple to not have a problem with the syntax..
and it executes correctly
but when I need to retrieve the data, I use
lista_cpcs = []
lista_patentes = []
for (pc.patente, cs.cpc_group_codigo_cpc_group) in cursor:
lista_cpcs.append(cs.cpc_group_codigo_cpc_group)
lista_patentes.append(pc.patente)
return [lista_cpcs, lista_patentes]
and I get the error Global name 'pc' is not defined
I get whats happening, it's interpreting pc and cs as python modules, but they are from the sql..
how to work in this?
Ps: I search for python mysql connector and didn't found anything with this.
The variables in your for loop: (pc.patente, cs.cpc_group_codigo_cpc_group) are user defined; the names used do not have anything to do with the names from the query. Thus, you can call them whatever you want. You may consider using (pc__patente, cs__cpc_group_codigo_cpc_group) or something.
The problem is that the dot notation in python != the dot notation from your SQL.
Got it, sorry for the post..
Searching in https://dev.mysql.com/doc/connector-python/en/connector-python-api-mysqlcursor-description.html
I learned a few attributes of the cursor, and using the Eclipse debugger I saw that it comes just the name, not the table connection..so I use
for (patente, cpc_group_codigo_cpc_group) in cursor:
lista_cpcs.append(cpc_group_codigo_cpc_group)
lista_patentes.append(patente)
and it's working now, and thanks for the help #Scott
What am I doing wrong? I am sure its just a simpile sytanx error.
Help is appreciated
db.venues.truncate("RESTARTIDENTITYCASCADE")
It looks like your command is all globed together without spaces. This link shows the command as:
db.venues.truncate('RESTART IDENTITY CASCADE')
>>> e=searchengine.searcher('searchindex.db')
>>> e.getmatchrows('functional programming') select w0.urlid,w0.location,w1.location from wordlocation w0,wordlocation w1 where w0.urlid=w1.urlid and w0.wordid=10 and w1.wordid=17
SyntaxError: invalid syntax
# it highlights the word select in the program
How do I correct this syntax error of the select statement? I am using Python with sqlite3.
You can't just plonk SQL into a python file. This error message is python telling you "I have no idea what select is".
To be more helpful, you'd need to share what library you got "searchengine" from, but no matter what that is, your code is not valid python, so there's no way it's going to work.