check if key exists in sesison python

Solutions on MaxInterview for check if key exists in sesison python by the best coders in the world

showing results for - "check if key exists in sesison python"
Riccardo
13 Nov 2020
1d = {"apples": 1, "banannas": 4}
2# Preferably use .keys() when searching for a key
3if "apples" in d.keys():
4  print(d["apples"])
5
Lia
03 Oct 2020
1d = {}
2r = d.get('missing_key', None)
3
Ilaria
15 Mar 2017
1# Check if key exists
2if session.get("key") == None:
3	# Do something if it doesnt exist
4else:
5	# Do something else if it does exist
queries leading to this page
check if an object is in key in a dictionary in pythonpython keyerror but key exists in class pythoncheck key dictionary pythoncheck if a given value already exists in a dictionary pythonif key in dict python existshow tp know if a key in present in dict pythoncheck if element has a key in pythonpython check if key not in dictionaryif key existhow do i find if a key is in dictionary or not pythonhow to update a dictionary value if the key already exist pythonpython if exists keypython exist in dictionarycheck key exsist in map in pythoncheck if key in python dictionarypython test if key is in dictionarypython check for key in dicthow to check if key exist in dictionary in pythoncheck if a key already exists in dictionary pythonexistience of key in dictionaryfind python dict not exsit keycheck if key exists in dict pythondict check key exist python 2how to check if a key is not in a dictionary pythonif key exists pythonpython check if key has value in dictionarypython if key exists in diccheck if any element is key in dictionary pythoncheck 3 dictionaries exist or not pythoncheck if a key exists in a dictionaryhow to check if a key exists in a dictionary pythonchecking existence in dictionary pythonpython dictionary check to see if key existsdoes key exist in dictionary pythonpython get value from dictionary if key existscheck whether a particular key is the dictionary pythoncheck if dictionary key is present pythoncheck if a key exists in dictionaryhow to check if a dictionary contains a key or not in pythoncheck key in dict pythoncheck if exists in dictionary pythonpytho check if key exists in dict without exceptionpython if key does not existcheck if key exists in dictionary pythonpython dict field existcheck if a dict have a keycheck if string in dictionarypython dictionary default value if key doesn 27t existpython3 check to see if key exists in dictionarycheck key not in dictionary pythonexistience of key in dictionary in pythonhow to check if dictionary has key pythonpython keyerro when key existshow to find key in dictionary pythonpython check if element in all dictpython if key in mappython contains keytest if key is in dict pythonchecking key in dictionary pythonwhat happens when get key dictionary does not existcheck key exists in array pythoncheck if dict has keycheck if dictionary has object pythoncheck key exists dict pyhow to print one dictionary item if it present and notpython check thing dicmatching a dictionary key exists pythonpython check if a key is in a dictif key doesn 27t exist create it pythoncheck if dictionary key exists pythoncheck if keyin dictionary pythonpython check if dict has keyspython check if exists in dictionarydict get if existspython find if a key exists in dictionarypython check if key does not exist in dictpython dictionary check if element existspython test if key in list existscheck if dict contains key pythonhow to check key is present in dictionary in pythonif key exists in dictionary pythondictionary python check if key existspython list of dictionary if value of key existshow do you check for the existence of a key in a dictionary 3fpython key error even though key is in the dictionarypython configparser check if key existspython if dict entry existspython check if key available in dicthow to check wether a key exists in dictinaypython if exists in dictinbuilt function to find a key from a value pythonpython check if key is in dicthow to check if key exist in python dictionarypython test if key in dictif key exists in dict pythonpython if dict has keycheck and see if key exists in dictionary pythoncheck if dictionary key exist pycheck is key exists in dict pythonhow to check if an element not present in python dictionaryupdate dictionary python if key doesn 27t existsif in dicitonary pythonpython check if a dict has a keyhow to check if dict has key pythoncheck for a key in a dictionary pythondictionary get if exists pythoncheck if dict python3dict check if key exists pythonpython check if key is in hash tablehow to search for an existance of a key in a dictioneary pythonpython key existscheck if a key is present in a dictionary pythoncheck if a key is present in a dictiorary pythonpython check if exists in dictpython chek dict property exsistcheck if key in map pythonpython keyerror even though key existspython dict check keycheck key in dictcheck to see if a key for a dictionary existshow to find key exists in dictionary pythonif dict key is non existantpython check if keyword in dictionarycheck if a dict entry existspython check if key not in objectcheck for existance hashmap in pythoncheck key present in dictionary pythonif item is in dictionary pythondict if key exists pythonif kkey exist in dictionary pythonpython check if key exists in listpython dictionary if key exists else add ithow to check if dictionary have a key or not in pythonpythondictionary if key exists else add itpython checking if key exists in dictionarycontains if a key exists in dict pythondict contains key pythonpython contain keycheck python dicitnaoty for keycheck if a key exists in a dictionary pythonpython check a key exists in dictionaryhow to check key exist in dict in python 3how to check if a key is present in a dictionary pythoncheck key exists or not in map pythosearch for key in python dictif dictionary has no keysee if dictionary key exists pythonpython3 check if key exists in dictionarypython see if a key is in a dictionarycheck if word is in dictionary pythonpython find key not in dictionarypython if key not exists in dictionarypython dictionary reference key that doesn 27t existhow to check if a key is in dictionary pythonpython key exists in dictpython dictionary check if value exists for a keypython add check key existspython check if dict has keypython dictionary keys containshow to check if a dictionary contains a key pythonhow can i check if an element is present in a dictionary pythonpython best way to check if a dict has a keypython disc key existscheck if item not in dictionary pythonpython check if value exists in dictionarycheck if dictionary has key pythondict python key existsif not in dict pythonhow to check if dictionary has a key in pythonif key name existscheck key in dictionary pythoncheck a key in dict pythonhow to check if a key is present in a dictionary in pythoncheck dictionary contains key pythonpython dictionary key existscheck if key in dictionarypython check if directory key existscheck to see if key is in dictionary pythonhow to check if something exists in a dictionary pythonhow to check if a key value exists in a dictionary 2b 3d use if not exists key pythoncheck if key is in map pythonif key not exists python3check the existence of a key in pythondictionary check for keys in pythonpython dictionary key checkcheck if there is somthing in dict in pythonpythno check if dic has keykeyerror but key exists pythoncheck the key of a dictionary pythoncheck data exist in dict pythonhow to check if a key in a dictionary already exists pythonpython dictionary update if key existshow to check if item already in dict pythoncheck if key does not exist in dictionary pythonhow to know if dict has a key pythonhow to check if dictionary key exists pythonpython verify key exists in dictionarycheck if hash map contains key pythonpython check if key exists in list of dictcheck keys in dictionary pythonprint the values of dictionary if key exists pythonhow to find if any key is present in dict or notpython check if key in modelpython is key in dictionarypython checkmapthe given key is not present in the dictionarypython how to check if the key is not in the dictionarycheck if list has dict with specific key 27check the given value is in a dictionary aand print name of the dictionary python 27python check exists in dictionaryis key in dictionary in python 3fpython check if dictionary has such keypython check if item is in dictionarykey error but key exists pythoncheck if python dictionary key matcheshow do you check if a key is present in a python dictionarypython check to see if key exists in dictcheck if is key pythoncheck key exists in dict pythonpython check key in dictget method dictionary python not key existspython check existence of hash keypython check if inside dictionary has keypython check if element exists in dictionaryhow to check if a value is in a key in a dictionary pythonif dictionary has key pythondictionary comprehension keyerror keyy does not existhow to check whether a key exists in a dictionary in pythonpython ordereddict check if key existspython check if dict name already existentfind if a key exists in dict pythonkey exist pythonpython dictionary if key existscheck if key is in dict pythonpython cero if elemnt not exist in dictcheck if a key is in dictionary pythonpython count where key exists in dictpython how to check if an item is in a dictionarydictionary python if key existscondition python key in dict key existspython check if dict key exists without inpython if item in dictionaryaccess key that doesnt exist pythoncheck if key is present dict keys innpython 3python dictionary test if key existsdict pop if existsif has key pythonpython check if keys exists in dictpython map existshow to ccheck if a key is in dictionarypython check if dict hasn 27t keycheck if dictionary has key python3how to check whether the word is present in dictionary in pythonpython check for key ion dictfidning key in dictionary pythonpyton hydra check if key existsdict if key existspython if key existif no key in dictionary pythonhow to check if key is in dict in pythoncheck if element is not in dictionarycheck if in dictionary pythonpython dictionary has key checkpython dictionaries how to test if a key existshow to check if a key exists in a dict or not python 27check if key is not in dictionary pythondict exists or not pythonpython dict is key existhow to check if a dictionary has a key in pythonhow to see if dictionary contains key pythonif dict key does not exist python init dicthow to check for key in hashtable pythonhow to check if a key is already in a dictionary pythonhow to check if key in object is exiset pythondictionary if exists pythoncheck if a python dict contains a keykey exists in pythoncheck if the key exist in dictionary pythonpython add to dictionary if key does not existsee if key exists in dictionary pythonhow to check if key is present in pythonhow to check if something in dictionary pythonfinding key in ductionary in pythonpython key not exist errorhow to search a key in dictionary if it exitspython dictionary create key if doesn 27t existcheck if dictionary exists pythonpython exists in dictpandas key error but key existscheck if value exist in dict pythonpython check that dictionary contains keypy check if value exists in dictpython check if key does not existho0w to check if a word is not in a dictionary pythoncheck if key is present in dictionary pythonhow to check if a key exist in my dict pythoncheck key exists in dictionary pythoncheck if key id available in dictionary pythondict check key exists pythonpython check if key exischeck if key isn 27t exists in dictionary pythoncheck if dictionary has elements pythonhandling key not present in dictionarycheck object key exists in pythonpython check key exists in dictcheck if element exist in dictionary pythonhow to find if something is in a dictionary pythoncheck if key in dict pythoncheck if dict entry exists pythonflask session check if key existsif key does not exist in dictionary pythonpython set dict value if not existpython check key existence in dictfind if key existshow to check if word is in dictionary pythonif not exists dictionaryif not in dictionary pythoncheck if a word is in a dictionary pythonpython if condition does dictionary key existvalidate key in dictionary pythoncheck if dict key existshow to check if dict element exists pythonpython check if key in diccheck if dictionairy existsfind element in dictionary pythonpython key not in dictcheck if key is defined pythondic check of exist keypython dict check if key existischeck if the key exists in dictionary pythonif value in dictionary key pythonhow to check if object key exists in djangocheck if key existcheck if a dictionary does not have a certain key pythonpython check if a key exists in a dictionarykey not in dictionary pythonhow to find keys in dictionary pythoncheck if a dictionary has a certain keypython check attribute in dictpython key in dict orhow to check if the key exists in dictionary in pythonhow check it key exist in object in pythonpython dict existsif key exist pythonif dict has key pythonhow to check key is not in dictionary pythonverify a dict have a key pythonhow to find if a key exists in python dictionarypython dictionary get key not existfind a key in a dictionary pythonwrite a python script to check whether a given key already exists in a dictionaryhow to check if key is present in dictionary or nothow to check if a key already exists in dictionary in pythonpython key in dictpython dictionary if existspython dictionary test key existspython set key if not existspython dictionary check whether key existspython check if dictionary key existspython check if key in dictionarycheck if key is number pythonchck if key exist pythondict key existsif key does not existhow to check for existence in python dicttest if dictionary has key pythonpython dictionary containspython dict pop if not existchwck if key is not in dict pythonpython key not in dictionarykey exists in dictionary pythonpython if element in dictionary keysdict key python check if key existspython check if key existif key in dictionary exists pythondict check if key present pythoncheck key has its value in dictionary pythonpython check for key in dictionarypy check if key in dictpython key doesn 27t existif python dictionary key existshow to find key in python dictionarypython dictionary existshow to check if a string is a key in a dictionary pythondictionary test if key exists pythonhow to check if an element is not in a dictionary pythonpython dict exist elementpython test dict for keyspython check if object key existspython dictionary create if not existhow to check if and key exists in a dictioanry pythonhow to know a key does not exist pythonhow to learn if python dict key existschecking for a key not in dictionary in pythondictionar exist keycheck key is present in dict pythoncheck for key in dictionary pythontest if key available pythonpython is key in dictcheck if key exists in dictionary python defaulthow to check key preenton dic pythoncreate dictionary key if not existscheck if key exist in dictwhen a dictionary item doesn 27t exist but i want itpython dictionary if value existssearching for key in dictionary pythonpyhton check if key already in dictget value if key exists pythonpython condition if a key exist in dictpython dictionary check if key not existscheck if value belong to one key or other python dictionaryif key not in dictionarypython3 check key existshow to find a key in dictionary in pythonpython check if dict has key valuecheck if such key exists in dictionary pythoncheck if value is key in dictionary pythonpython check if key contained in dictionarypython dict set if not existshow to check if a dictinery exists pythonpython if not in any dict if key not found in dictionary pythonkey in dictionary pythonif exists in dictionary pythonpython dict look if a key existpython if key in dictionarychecking if the key exists in the dictionaryhow to find the key is present in dict or not in pythnpython check if dict key presentif key in dict pythondict chck if key existscheck if key is present in dict save keypython check if key is in dictionaryif key is not in dictionary pythonpython check if a key existscheck key is in dict pythonhow to check key in dictionary pythoncheck if has keypython if key exists in dictionarydictionary python test that a key existsif key in dictcheck if key exists in sesison pythonpython check if dictionary item existspython test if key exists in instancetest for dictions pythonchekc if key existspython dictionary check key exitshow to check dictionary contains key in pythondictionary check if key existspython check if dictionary has keypython find out if dict has a certain keypython dictionary find keyfinding a key in dictionary pythonpython dict check if key existcheck if a key is present in dictionary pythonpython check key existspython check if in dictionarysearch in dictionary keys pythonpython dict check if key existscheck if python dict has a keywhat does dictionary return if not present pythonpython3 if dict has keypython dict see if key existspython check if key existspython if key exists elsekey is present or not in dict pythonif value not in dictionary pythonpython dictionary if key not existshow to know if a key is present on a dictionary in pythonpython if exist in dictfind key in dictionary pythonhow to find where a key is in a dictionarykey exists in python dictionarypython check if key exists in dicdjango check if dictionary key exists in a testhow to search a key in dictionary in pythoncheck if key exists keyvpython dictionary only add key if value existspython check if a dictionary key existschekc if value is validexists before adding to dict pythonpython key does not exist exceptioncheck for key in dict pythoncheck if key exists in object pythoncheck if key in a dict in pythonsession has key python 3python dictionary create new key if not existscheck if a key exist s in python idcthow to check particular key exists in dictionary pythonpython check if key exist in dictionarycheck membership in dictionary pythonif key not in dictionary pythoncheck if key already exists dictionary pythonif there exists in hashmap in pythonpython check if a list of key exists in a dictionarycheck if key exists python how to check if a particular key exists in a dictionarypython check if key is existshow to check if a element in a dictionary exists pythonmake sure a key exists in dict pythonveryfing if a key is in a dictionarydict key existence pyhoncheck exist key in dict pythonpython check if key exists in looppython dict none if doesnt existcheck if key exists in dict pyexisist in python dictpython dict none if key does not existcheck key of dictionary pythonpython dict if key existscheck if key exists in python dictionarycheck if element in dictionary pythoncheck if key is available in dictionary pythonhow to search for key in dictionary pythoncheck if dict has a key pythonpython how to check if a key existscheck if python dict has keypython dict set key if not existswhat happens if a dictionary key doesnt have anything in ithow to check for a key in a dictionary pythonhow to check is key is available in dictionary in pyhthonhot to check a key is already in dictionary in pythonchecki if key exists in dictionalry or notfind a key in dictionary pythoncheck if an element is present inside dictionary pythonpython dictionary check if key existslist of dictionary python check if key existshow to check if a key is in the dictionary pythoncheck if a key is in a dictionary pythoncheck for an element in dict pythonhow to check if something is in a dictionary python 5cpython dict if key not existspython dict how to check if key existshow to ignore if any any key does not exists in dictionary pythoncontains dictionary pythonkeyerror in python but key existshow to check if a key exists in dictcheck if key doesn 27t exists dictionary pythonpython add key if not existsis in dictionary pythonpython dictionary see if key existshow to check if dictionary exists in pythonpython if not dictionary keypython check item in dictionary keysif key and value exist in pythonpython dictionary check for a keypython dictionary create list if key does not existpython check if tuple key existschecking if a dictionary contains a key in pythonhow to check if key exists in dictionary python python if key in object existscheck dictionary key pythonhow to check key exists in python dictionarypython check key in dictionarypython dictionary add key if doesn 27t existpython check whether dict has keydictionary check if key exists pythonhow to check if a key is present in a py dictif a key exists in dict pythoncheck if has key pythonpython check key exist in dictcheck if element exist in key in dictionary pythoncreate key if not exist pythonpython check if string is a key in dictionarycheck for existing key in a dictionary pythonpython if not in dictionarypython exist in dictpython dict add key if not existscheck if dictionary has keypython dict check if a key existshow to check if key does not exists in dictionary pythonpython validate keys in dictionarykey error even though key exists pythonpython django if key existscheck if string is in dictionary pythoncheck if word exists in dictionary pythonpython find key in dictionarycheck if exist in dictionary pythoncheck that a key is in a dictionary pythondict python if key existspython key in dict checkpython how to check if a key is present in a dictionarycheck if python dictionary has keycheeck if key exists dicpython dict create if not existhow to check if something is in a dictionary pythonfind key is present or not in python dictpython check if key not in dicitonayrcheck if map contains element pythoncheck if dictionary has a keypython dictionary create key if not existspython dictionary kex existhow to know if a key is in a dictionary pythonpython if dictionary has keyfastest way to check if key exists in dictionary pythonhow to check if key is in pythonpython does key exist in dictionarypython does key existpython dictionary contains a keychecking a dictionary pythoncheck whether dictionary has key pythonin keyword dictionary pythonhow to check if key is not in dictionary pythonpython if key exists listpython how to check if a key exists in dictionarypython how to check if key exists in dictionarypython dict if key does not existif dict key exists pythonhow to check if a node is in a dictionary pythonchecking a dictionare pythonpython check if key ehow to check if a particular key is present in dictionary pythonpython check if key exists in dictionary before usingpython check if dict contains keyhow to check key exist in dict in pythonhow to find out a key exists in a dictionary pythonpython check dictionary has keyspython detect key existsif key in dictionary pythoncheck if key exists in dictionaryif key doesn 27t exist in dictionary pythonpython dict check if keyfind if a key is in a dictionary pythonhow to search key in dictionary in pythonpython check in dictionarycheck if dictionary contains key pythonpython check if key exist in arrayif key not in dicthow to check if a certain key exists in dictionary pythonpython how to check if dictionary key existsif key doesn 27t exist pythonpython dictionary find if key existspython check if a key dictionaryhow to check if exist a key on object pythonif variable not in dictionary pythonhow to check if a key exist in dictionary pythonpython program to check if a given key already exists in a dictionary how to check if an item is in a dictionary pythonpython check if key already exists in dictionary add valuepython check if key exist in dictcheck if key exists dict pythonpython if exists value in dicthow to check key exists in dictionary pythoncheck if key exist pythonfind key in dict pythoncheck if key present in dictionary pythonshow if items is in dictionary pythonwhat to do if value does not exist in python dictionarycheck if dictionary key exist in python3check if value in dict exists python else 0test if key in dictionary pythonpython if key in dicthow to verify if a key is in a dic pythonhow to check key name in dictionary pythonpython check key not existpython check if key exists in dictionarypython how to check dictionary key existscheck presence of a key in a dictpyhton check if dict has keyhow to check if dictionary has element pythonpython list calculate key existhow to find key in dictionary in pythonhow to check if key exists in dictionary pythonchecking dictionary keys in pythonfind a key in dict pythonpython check if key in dictdjango check if key exists in objecthoe to check if there is a key in dict in pythonverify key in dictionary pythonpython dict check if key exists with getpython check to see if dict has keyspython check if dict existshow to check if a key exists in pythonpython chdck if dictionatry key existspython key error even when key existschecking if a key exists in a dictionary pythonpython keyerror when key doesn 27t existpython dict key existscheck if key exist in dictionary pythonpython keyerror check if existscheck if item in dict pythonpython dictionary key does nnot existsdict python check if key existspython check if not in dictionarypython check if a key exist in dictionaryhow to check if something is a name in a dictionary pythoncheck for a key in dictionary python has keyhow to find a key in a dictionary pythoncheck if it is a value or a key pythonif key name is in dictionary in pythonpython dict check not exsitpython key already exists in a dictionarypython check key existpython dictionary how to check if key existspython create dictionary if value doesn 27t exist dont create key search for key in dict pythonpython check if item is not in dictionarycheck if element exists in dictionary pythonhow to check of key in pythonpython if dict key existspython test key exist in dictionarydict cj 3dheck if key existspython check if key exists in dictpython check if keys exist in dictionaryif key exist in dict pythoncheck if there is a key in dictionary pythoncheck if a key in dictionary exists pythoncheck if key exists in dictionary 2c if not keep checkinghow to check a key is present or not in dictionarypython check if element exists in maphow to check if a key in dictionary in pythonpython to check if key exists in dictionarycheck if dict key exist pythonpython how to check key is in dictionaryget key if exists pythonerror if dictionary key does not exist pythoncheck if key in dictionary pythonkey doesn 27t exist pythonpython how to know if a key existspython check if key already exists in dictionarymap contains key pythonhow to check if a key exists in dictionary 3fpython dictionary contains keyverify if dict has keypython avoid key not exists in dictcheck to see if element is a key in dictionary pythonpython dictionary existence of a keychecki if key exists in dictionalry or not pythoncheck if work exist in dictionary pythonpython dict if presentcheck if entry not exists in dictionary pythonpython check key exists in dictionarytest for key in dictionary pythonpython create dictionary if value doesn 27t exist don 27t create keydictionary python key existspython keyerror but key existskey exists python dictionarycheck if key is in a dictionary pythonpython key existencehow to add to dictionary if key already existknow if exist un dict pythondictionary if in pythoncheck for dict key pythoncheck for specific keys in dictionary pythonif dict key existscheck if element exists in dict pythonpython test if dict has keycheck if key present in python dictpython if the key value doeas not existpython check if one or another key is in dictcheck if value is in dictionary keys pythoncheck if a dictionary key exists pythonfind if a key is present in dictionary pythonpython add key to dictionary if it doesn 27t existcheck if element in dictpython and check dict existscheck if a key exists in dictionary pythonpython how to know if a dict contains a keypython3 check if key exists in dictionary o 281 29check if an element is in a dictionary pythonjson check key exists pythonwhat returns python if key not in dictif dict key does not exist pythonhow to check whether a key is present in dictionary pythonpython dictionary verify key existsif dict 5b 27 27 5d in dict keys 28 29i don 27t want my python dictionary to update if key existshow to check key exists or notpython check if dictonary has following keyshow to check if a key is in a dictionary pythoncheck if exists dictionary pythoncheck key exist in dict pythoncheck if key exists in sesson python flaskpython verify if dict has keyto check if keyexists in dictionarypython dict check if any key containspython key error but key existscheck dictionary key exists pythonpython dictionary test key existcheck key existance pythonphython check if key existskey check python dictpython 3 check if key in dictionary existstest if dictionnary key existspython check dict has keypy object key existscheck to see if a key is in a dictionary pythonhow to check a key exists in dictionary in pythonpython find a key in a dictionarypython check if key exists inside a keypython dictionary search by keypython dict set value if not existcheck if key exist in dict pythonpython check if item exists in dictionarycheck have key in dictionary pythonpython dictionary check key existscheck if element is in dictionary pythoncheck if key is in dictionary pythoncheck key in dic pythonpython check if value is in disctionnary keyscheck if key exists in dic pythonpython check if dict key exists and has valuefind in dict pythoncheck item present in dictionary in pythoncheck dict key exists pythonhow to check if something is in a dictionary python keyshow to check if a key exists in dictionary pythonpython 2 7 dictionary check if key existspandas if key not existpython set check if key existspython check dictionary key existspython check if in dictionary keyscheck key exists pythonhow to check if a dict has a key pythonpython dictionary if key doesn 27t existpython check if something is in a dictionaycheck if a dictionary has a keypython check is key existspython error when key doesn 27t exist in dictionarycheck if key exist in a dictionarypython isset dict sub keyhow to know key not in dictionary pythonif value does not exist in dictionary pythonif i in dictionary pythonpython if key existsdictionary where key exists pytonpython dictionary check if value existspython check if dictionary does not have keypython check dict key existscheck if not in dictionary pythonsession has key pythonpython dict check if keys existsif dictionary key doesn 27t exist pythonpython check if key of dictoary is somethingpython if string in dictionary keyschaeck if key present in dict pythonhow to check if you have all key in dictionary pythonhow to check if a dictionary key exists in pythonhow to assume that the value is 0 if key doesn 27t exist in dictcheck if dict has key pythoncheck if a dictionary has a kye or notcheck if dict has key python 3check with if statement if dictionary field does not exist pythonpython if x in dictionary keysreturn false if dictionary key does not existcheck if key exists in sesison python