[New-bugs-announce] [issue44496] string.Formatter class not allowing {.field}

[Aschwin]

New submission from Aschwin <aschwin at vanderwoude.info>:

I expected the custom Formatter to behave the same as the normal "".format() function, but unnamed args or not supported.
Below is an example, which fails at a KeyError.


from string import Formatter

class test():
    def __init__(self):
        self.msg = "OK"
t = test()

print("Normal format() is {.msg}".format(t))

f = Formatter()
print(f.format("Formatter.format() is {.msg}", t))

----------
components: Library (Lib)
messages: 396383
nosy: avdwoude
priority: normal
severity: normal
status: open
title: string.Formatter class not allowing {.field}
type: behavior
versions: Python 3.8

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue44496>
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