Question

in Python, define a function named filterOut with three parameters. The first argument passed to the function should be a list of dictionaries (the data), the second a string (a dictionary key), and the third another string (a dictionary value). This function must return a list of all the dictionaries from the input list which do NOT contain the indicated key:value pairing.

in Python, define a function named filterInRange with four parameters. The first argument passed to the function should be a list of dictionaries (the data), the second a string (a dictionary key), with the third and fourth arguments being numbers, representing the low and high values of range. This function must return a list of all the dictionaries from the input list which contain the key:value pairs where low <= value < high.

Answer 1

def filterOut(lst, key, value):
    result = []
    for d in lst:
        if key not in d or d[key] != value:
            result.append(d)
    return result


lst = [
    {'key1': 'v1', 'key2': 'v2'},
    {'key1': 'v2', 'key3': 'v2'},
    {'key3': 'v1', 'key4': 'v2'},
    {'key1': 'v1', 'key5': 'v2'},
    {'key1': 'v1', 'key6': 'v2'}
]
print(filterOut(lst, 'key1', 'v1'))

def filterInRange(lst, key, low, high):
    result = []
    for d in lst:
        if key in d and type(d[key]) == int and low <= d[key] < high:
            result.append(d)
    return result


lst = [
    {'key1': 1, 'key2': 'v2'},
    {'key1': 10, 'key3': 'v2'},
    {'key3': 4, 'key4': 'v2'},
    {'key1': 7, 'key5': 'v2'},
    {'key1': 5, 'key6': 'v2'}
]
print(filterInRange(lst, 'key1', 2, 8))