python - Escape single quote when using Pandas with tuple for IN statement -


i trying use in statement psycopg2. passing tuple, 1 of items string contains single quote (ex: l'enfant plaza).

when converting tuple, python automatically adds double quotes (ex: ('union station', "l'enfant plaza", 'dupont cir'))

therefore, when execute sql query, getting error: 

dataframe = pd.read_sql("""select * trips                                 originlocation in {}                             """.format(origin_locations_tuple), connection)   error: column "l'enfant plaza" not exist

clodoaldo's advice put me on right track. using pandas query parameters solved it. working version looks this:

sql = """select * final_trips_prod                             (dateoftrip + origintime)                                 between (timestamp %(datetime_selected)s - interval '3 hours')                                 , (timestamp %(datetime_selected)s + interval '3 hour')                             , originlocation in %(origin_locations)s                             , destinationlocation in %(destination_locations)s     """ dataframe = pd.read_sql_query(sql = sql,                               con = connection,                               params = {                                   'datetime_selected': datetime_selected,                                   'origin_locations': origin_locations,                                   'destination_locations': destination_locations})

Comments

Post a Comment

Popular posts from this blog

What is happening when Matlab is starting a "parallel pool"? -

running parallel cpu processes in matlab starts command parpool() according documentation , function: [creates] special job on pool of workers, , [connects] matlab client parallel pool. this function takes bit of time execute, on order of 30 seconds. in other multi-cpu paradigms openmp, parallel execution seems totally transparent -- i've never noticed behavior analogous matlab (granted i'm not experienced parallel programming). so, happening between time parpool() called , when finishes executing? takes long? parallel computing toolbox enables run matlab code in parallel using several different paradigms (e.g. jobs , tasks, parfor , spmd , parfeval , batch processing), , run either locally (parallelised across cores in local machine) or remotely (parallelised across machines in cluster - either 1 own, or 1 in cloud). in of these cases, code run on matlab workers , copies of matlab without interactive desktop. if you're intending run on remo...
Read more

angular - DownloadURL return null in below code -

when change file updated in firebase storage when try downloadurl show null. filechange(event: any) { const imagefolder: string = this.employee.id; const filelist: filelist = event.target.files; const file: file = filelist[0]; const storageref = firebase.storage().ref().child(`${imagefolder}/profile.jpg`).put(file); console.log(storageref.snapshot.downloadurl); } the put() asynchronous. if want url after file uploaded have this: firebase.storage().ref().child(`${imagefolder}/profile.jpg`).put(file).then((snapshot) => { storageref = snapshot.downloadurl: console.log(snapshot.downloadurl); });
Read more

php - Cannot override Laravel Spark authentication with own implementation -

during login process of laravel spark need request token of remote api. api stores exact same users , passwords laravel spark application. therefore need username , non hashed password of user during authentication process. i thought overriding authenticated method solution problem. in routes/web.php override post /login endpoint , pointing endpoint own logincontroller: <?php namespace app\http\controllers\auth; use illuminate\support\facades\log; use illuminate\http\request; use laravel\spark\http\controllers\auth\logincontroller sparklogincontroller; class logincontroller extends sparklogincontroller { /** * create new login controller instance. * * @return void */ public function __construct() { parent::__construct(); } /** * handle successful authentication attempt. * * @param request $request * @param \illuminate\contracts\auth\authenticatable $user * @return response */ public fu...
Read more