How to identify if certain keys are present in dictonary?

Question

I have dictonary named as Entity which look like this:

Entity = {'ORG': 'ABC','PERSON': 'Ankit','ORDINAL': '150th','DATE': 'quarterly', 'MONEY': 'dollars'}

Now I have to create other dictionary which will contain below value according to condition.

Class = {'Signal':'<Condition>'}

The condition is:

If Entity key consists of ORG and PERSON then in Class dictionary value "Medium" should be updated.
If Entity key consists of ORG, PERSON, and MONEY then in Class dictionary value "Strong" should be updated.
If Entity key doesn't consist of above keys then in Class dictionary value "Weak" should be updated.

How should I make the condition for the above problem?

I want an output in Class dictionary like below,

If in Entity dictionary there are ORG and PERSIN keys then Class dictionary should be like,

Class = {'Signal' : 'Medium'}

Possible duplicate of [Python check if list of keys exist in dictionary](https://stackoverflow.com/questions/10995172/python-check-if-list-of-keys-exist-in-dictionary) — Guillaume, May 28 '19 at 13:19

score 0 · Answer 1 · answered May 28 '19 at 13:17

0

To check if dictionary contains specific key use: 'ORG' in Entity statement which returns True if given key is present in the dictionary and False otherwise.

answered May 28 '19 at 13:17

maslak

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score 0 · Answer 2 · answered May 28 '19 at 13:20

0

You can use the .keys() function on the dictionary to check before accessing the data structure. For example:

def does_key_exist(elem, dict):
    return elem in dict.keys()

answered May 28 '19 at 13:20

Colby

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score 0 · Accepted Answer · answered May 28 '19 at 13:22

if all([a in Entity for a in ('ORG', 'PERSON', 'MONEY')]):
    Class['Signal'] = 'strong'
elif all([a in Entity for a in ('ORG', 'PERSON')]):
    Class['Signal'] = 'middle'
elif not any([a in Entity for a in ('ORG', 'PERSON', 'MONEY')]):
    Class['Signal'] = 'weak'

Note that, according to your question, if Entity contains only 'ORG' or only 'PERSON', no 'Signal' will be set in Class.

How to identify if certain keys are present in dictonary?

3 Answers3