Python | Filter the negative values from given dictionary
Given a dictionary, the task is to filter all the negative values from given dictionary. Let’s discuss few methods to do this task.
Method #1: Using dict comprehension
# Python code to demonstrate # return the filtered dictionary # on certain criteria from six import iteritems # Initialising dictionary ini_dict = {'a':1, 'b':-2, 'c':-3, 'd':7, 'e':0} # printing initial dictionary print ("initial lists", str(ini_dict)) # filter dictionary such that no value is greater than 0 result = dict((k, v) for k, v in ini_dict.items() if v >= 0) print("resultant dictionary : ", str(result)) |
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filter_none
Output:
initial lists {'a': 1, 'c': -3, 'd': 7, 'b': -2, 'e': 0}
resultant dictionary : {'a': 1, 'd': 7, 'e': 0}
Method #2: Using lambda and filter
# Python code to demonstrate # return the filtered dictionary # on certain criteria from six import iteritems # Initialising dictionary ini_dict = {'a':1, 'b':-2, 'c':-3, 'd':7, 'e':0} # printing initial dictionary print ("initial lists", str(ini_dict)) # filter dictionary such that no value is greater than 0 result = dict(filter(lambda x: x[1] >= 0.0, ini_dict.items())) result = dict(result) print("resultant dictionary : ", str(result)) |
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filter_none
Output:
initial lists {'c': -3, 'd': 7, 'e': 0, 'a': 1, 'b': -2}
resultant dictionary : {'e': 0, 'a': 1, 'd': 7}
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