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Python Reference Manual |  |
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The following tokens serve as delimiters in the grammar:
( ) [ ] { }
, : . ` = ;
The period can also occur in floating-point and imaginary literals. A sequence of three periods has a special meaning as an ellipsis in slices.
The following printing ASCII characters have special meaning as part of other tokens or are otherwise significant to the lexical analyzer:
' " # \
The following printing ASCII characters are not used in Python. Their
occurrence outside string literals and comments is an unconditional
error:
@ $ ?