StyleFrame 对象的深拷贝

Question

如何制作 StyleFrame 对象的浅拷贝或深层拷贝？ 当我使用 copy.copy(sf) 或时， copy.deepcopy(sf) 出现错误： "RecursionError: 调用 Python 对象时超出最大递归深度"

import copy
from StyleFrame import StyleFrame
import pandas as pd
df=pd.DataFrame([list('abc')])
sf=StyleFrame(df)
copy.copy(sf)

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "C:\python\python373\lib\copy.py", line 106, in copy
    return _reconstruct(x, None, *rv)
  File "C:\python\python373\lib\copy.py", line 281, in _reconstruct
    if hasattr(y, '__setstate__'):
  File "C:\python\python373_vm1\lib\site-packages\StyleFrame\style_frame.py", line 121, in __getattr__
    if attr in self.data_df.columns:
  File "C:\python\python373_vm1\lib\site-packages\StyleFrame\style_frame.py", line 121, in __getattr__
    if attr in self.data_df.columns:
  File "C:\python\python373_vm1\lib\site-packages\StyleFrame\style_frame.py", line 121, in __getattr__
    if attr in self.data_df.columns:
  [Previous line repeated 495 more times]
RecursionError: maximum recursion depth exceeded while calling a Python object

Answer 1

只需将原始 StyleFrame 对象传递给StyleFrame。在内部，它会深度复制底层数据帧，也会复制一些内部属性。

sf = StyleFrame({'a': [1, 2]})
print(id(sf))
new_sf = StyleFrame(sf)
print(id(new_sf))

输出

1971232017152
1971267198144