3 examples of 'python json check if key exists' in Python

133
def _check_key_exists(d: dict, key: object, custom_exception=None) -> None:
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    """ Check if a key exists inside a dictionary. Otherwise, raise KeyError or a custom exception. """
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    try:
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        d[key]
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    except KeyError:
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        if custom_exception:
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            raise custom_exception
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        else:
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            raise KeyError

90
def check(json_data):
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    data = json.loads(json_data)
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    texts = data['ImageText']
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    # no text at all
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    if len(texts) == 0:
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        logging.debug("No text")
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        return True
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    # very little text
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    if len(texts) == 1:
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        logging.debug("One text label")
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        return True
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    # all the text is within the border area (probably an artifact)
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    if all_in_border(data['ImageBB'], texts):
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        logging.debug("All text is in upper or lower border")
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        return True
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    # almost the whole image is text
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    # use crude implementation where we just sum up the text area
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    # and kick something out if >50% is text
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    a = area(data['ImageBB'])
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    if is_sum_larger(a*0.5, texts):
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        logging.debug("Almost everything is text")
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        return True
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    return False

38
def has_key(key, keys):
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    for k in keys:
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        if k['id'] == key:
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            return True
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    return False