Eric V. Smith added the comment:
While they probably should be entered with escapes, there's no actual technical
requirement for that.
>From the command line, I can enter a control-A with control-V control-A (this
>might be different depending on your environment, or if you use an editor).
>This will enter a literal string containing a single character with value 1.
That gives:
>>> '^A' # ^A is the combination control-V control-A
'\x01'
>>> len('^A')
1
>>> ord('^A')
1
>>> b'^A'
b'\x01'
----------
nosy: +eric.smith
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<http://bugs.python.org/issue27949>
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