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113 lines
3.2 KiB
113 lines
3.2 KiB
import re
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def get_obj_list_element(obj, attr: str):
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r"""
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Get the element of the list in the object
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If the attr is a normal attribute, return the attribute of the object.
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If the attr is a index type, return the element of the index in the list, like `layers[0]`.
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Args:
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obj (Object): The object to get
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attr (str): The suffix of the attribute to get
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"""
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re_pattern = r'\[\d+\]'
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prog = re.compile(re_pattern)
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result = prog.search(attr)
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if result:
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matched_brackets = result.group()
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matched_index = matched_brackets.replace('[', '')
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matched_index = matched_index.replace(']', '')
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attr_ = attr.replace(matched_brackets, '')
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container_obj = getattr(obj, attr_)
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obj = container_obj[int(matched_index)]
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else:
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obj = getattr(obj, attr)
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return obj
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def set_obj_list_element(obj, attr: str, value):
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r"""
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Set the element to value of a list object
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It used like set_obj_list_element(obj, 'lyaers[0]', new_layer), it will set obj.layers[0] to value
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Args:
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obj (object): The object to set
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attr (str): the string including a list index like `layers[0]`
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"""
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re_pattern = r'\[\d+\]'
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prog = re.compile(re_pattern)
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result = prog.search(attr)
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if result:
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matched_brackets = result.group()
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matched_index = matched_brackets.replace('[', '')
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matched_index = matched_index.replace(']', '')
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attr_ = attr.replace(matched_brackets, '')
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container_obj = getattr(obj, attr_)
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container_obj[int(matched_index)] = value
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else:
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setattr(obj, attr, value)
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def hasattr_(obj, attr: str):
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r"""
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Check whether the object has the multi sublevel attr
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Args:
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obj (object): The object to check
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attr (str): The multi level attr to check
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"""
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attrs = attr.split('.')
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for a in attrs:
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try:
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obj = get_obj_list_element(obj, a)
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except AttributeError:
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return False
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return True
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def setattr_(obj, attr: str, value, ignore: bool = False):
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r"""
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Set the object's multi sublevel attr to value, if ignore, ignore when it doesn't exist
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Args:
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obj (object): The object to set
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attr (str): The multi level attr to set
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value (Any): The value to set
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ignore (bool): Whether to ignore when the attr doesn't exist
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"""
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attrs = attr.split('.')
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for a in attrs[:-1]:
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try:
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obj = get_obj_list_element(obj, a)
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except AttributeError:
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if ignore:
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return
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raise AttributeError(f"Object {obj.__class__.__name__} has no attribute {attr}")
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set_obj_list_element(obj, attrs[-1], value)
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def getattr_(obj, attr: str, ignore: bool = False):
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r"""
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Get the object's multi sublevel attr
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Args:
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obj (object): The object to set
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attr (str): The multi level attr to set
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ignore (bool): Whether to ignore when the attr doesn't exist
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"""
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attrs = attr.split('.')
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for a in attrs:
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try:
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obj = get_obj_list_element(obj, a)
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except AttributeError:
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if ignore:
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return None
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raise AttributeError(f"Object {obj.__class__.__name__} has no attribute {attr}")
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return obj
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