Question

在这种情况下，我想将所有字典键更改为大写。

我的字典看起来像这样：

dt = {＆＃39; case_a＆＃39;：＆＃39; EF57A48C＆＃39;，＆＃39; case_b＆＃39;：{＆＃39; case_b_a＆＃39;：5，＆＃39; case_b_b＆＃39;：3}，＆＃39; case_c＆＃39;：{＆＃39; case_c_a＆＃39;：{＆＃39; case_c_a_a＆＃39;：1，＆＃39; case_c_a_b＆＃39;：20，＆＃39; case_c_a_c＆＃39;：＆＃39; sensor / pos / ss1＆＃39;，＆＃39; case_c_a_d＆＃39;：0，＆＃39; case_c_a_e＆＃39;：1}，＆＃39; case_c_b＆＃ 39;：{＆＃39; case_c_b_a＆＃39;：1，＆＃39; case_c_b_b＆＃39;：-1，＆＃39; case_c_b_c＆＃39;：＆＃39; sensor / pos / ss2＆＃39;，＆＃39; case_c_b_d＆＃39;：99，＆＃39; case_c_b_e＆＃39;：1}，＆＃39; case_c_c＆＃39;：{＆＃39; case_c_c_a＆＃39;：2，＆＃39; case_c_c_b＆＃39 ;：20，＆＃39; case_c_c_c＆＃39;：＆＃39; sensor / pos / ss1＆＃39;，＆＃39; case_c_c_d＆＃39;：-1，＆＃39; case_c_c_e＆＃39;：1}} }

功能：

def T_change(payload=dict()):
    for key ,value in payload.items():
        if isinstance(value,dict):
            payload[str(key).upper()]=T_change(payload.pop(key))
        else:
            payload[str(key).upper()]=payload.pop(key)
    return payload

执行：

T_change（DT）

结果：

{＆＃39; CASE_A＆＃39;：＆＃39; EF57A48C＆＃39;，＆＃39; CASE_B＆＃39;：{＆＃39; CASE_B_A＆＃39;：5，＆＃39; CASE_B_B＆＃39 ;：3}，＆＃39; CASE_C＆＃39;：{＆＃39; CASE_C_A＆＃39;：{＆＃39; case_c_a_b ＆＃39;：20，＆＃39; CASE_C_A_E＆＃ 39;：1，＆＃39; CASE_C_A_A＆＃39;：1，＆＃39; CASE_C_A_C＆＃39;：＆＃39; sensor / pos / ss1＆＃39;，＆＃39; CASE_C_A_D＆＃39;：0}，＆＃39; CASE_C_B＆＃39;：{＆＃39; case_c_b_b ＆＃39;：-1，＆＃39; CASE_C_B_E＆＃39;：1，＆＃39; CASE_C_B_A＆＃39;： 1，＆＃39; CASE_C_B_C＆＃39;：＆＃39; sensor / pos / ss2＆＃39;，＆＃39; CASE_C_B_D＆＃39;：99}，＆＃39; CASE_C_C＆＃39;：{＆＃39; case_c_c_b ＆＃39;：20，＆＃39; CASE_C_C_E＆＃39;：1，＆＃39; CASE_C_C_A＆＃39;：2，＆＃39; CASE_C_C_C＆＃39;：＆＃39;传感器/ pos / ss1＆＃39;，＆＃39; CASE_C_C_D＆＃39;：-1}}}

我想将所有字典键更改为大写，但我不知道为什么函数会丢失某些键？

Answer 1

当您执行DEPRECATION: Uninstalling a distutils installed project (six) has been deprecated and will be removed in a future version. This is due to the fact that uninstalling a distutils project will only partially uninstall the project. Uninstalling six-1.4.1: Exception: Traceback (most recent call last): File "/Library/Python/2.7/site-packages/pip/basecommand.py", line 215, in main status = self.run(options, args) File "/Library/Python/2.7/site-packages/pip/commands/install.py", line 342, in run prefix=options.prefix_path, File "/Library/Python/2.7/site-packages/pip/req/req_set.py", line 778, in install requirement.uninstall(auto_confirm=True) File "/Library/Python/2.7/site-packages/pip/req/req_install.py", line 754, in uninstall paths_to_remove.remove(auto_confirm) File "/Library/Python/2.7/site-packages/pip/req/req_uninstall.py", line 115, in remove renames(path, new_path) File "/Library/Python/2.7/site-packages/pip/utils/__init__.py", line 267, in renames shutil.move(old, new) File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/shutil.py", line 302, in move copy2(src, real_dst) File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/shutil.py", line 131, in copy2 copystat(src, dst) File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/shutil.py", line 103, in copystat os.chflags(dst, st.st_flags) OSError: [Errno 1] Operation not permitted: '/tmp/pip-pId7ub-uninstall/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/six-1.4.1-py2.7.egg-info'时，您会更改字典的顺序，并且循环使用顺序工作。因此，当您弹出pop时，它将在执行操作后成为dict的最后一个元素，case_c_a_a将成为第一个。由于dict的第一个元素已经起作用，它将切换到下一个元素case_c_a_b，而无需处理case_c_a_c。要更好地理解它，请使用http://www.pythontutor.com/visualize.html

解决问题的方法是在函数中创建新的字典并使用return语句（也适用于递归调用）。这将解决问题。

我有一个将字典键更改为大写的函数，但该函数会遗漏一些键

1 个答案: