AttributeError: module 'IPython.lib.pretty' has no attribute '_deferred_pprinters' with 6.83.1

[jenshnielsen]

With the introduction of 6.83.1 my tests have started failing in CI with:

AttributeError: module 'IPython.lib.pretty' has no attribute '_deferred_pprinters'. Did you mean: '_deferred_type_pprinters'?

This seems to have been introduced via #3728

Testing this locally with IPython 8.15.0 I see the same issue.

In [1]: import sys

In [2]: ipp = sys.modules["IPython.lib.pretty"]

In [3]: ipp._deferred_pprinters
---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)
Cell In[3], line 1
----> 1 ipp._deferred_pprinters

AttributeError: module 'IPython.lib.pretty' has no attribute '_deferred_pprinters'

full traceback:

self = <hypothesis.vendor.pretty.RepresentationPrinter object at 0x7fd5d77cf3a0>
output = None

    def __init__(self, output=None, *, context=None):
        """Pass the output stream, and optionally the current build context.
    
        We use the context to represent objects constructed by strategies by showing
        *how* they were constructed, and add annotations showing which parts of the
        minimal failing example can vary without changing the test result.
        """
        self.broken = False
        self.output = StringIO() if output is None else output
        self.max_width = 79
        self.max_seq_length = 1000
        self.output_width = 0
        self.buffer_width = 0
        self.buffer = deque()
    
        root_group = Group(0)
        self.group_stack = [root_group]
        self.group_queue = GroupQueue(root_group)
        self.indentation = 0
    
        self.snans = 0
    
        self.stack = []
        self.singleton_pprinters = {}
        self.type_pprinters = {}
        self.deferred_pprinters = {}
        # If IPython has been imported, load up their pretty-printer registry
        if "IPython.lib.pretty" in sys.modules:
            ipp = sys.modules["IPython.lib.pretty"]
            self.singleton_pprinters.update(ipp._singleton_pprinters)
            self.type_pprinters.update(ipp._type_pprinters)
>           self.deferred_pprinters.update(ipp._deferred_pprinters)
E           AttributeError: module 'IPython.lib.pretty' has no attribute '_deferred_pprinters'. Did you mean: '_deferred_type_pprinters'?

[Zac-HD]

I noticed that earlier today and will fix in #3730 shortly 🙂