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Diffstat (limited to 'Doc/library/string.rst')
| -rw-r--r-- | Doc/library/string.rst | 100 |
1 files changed, 50 insertions, 50 deletions
diff --git a/Doc/library/string.rst b/Doc/library/string.rst index 9b28f99..262b785 100644 --- a/Doc/library/string.rst +++ b/Doc/library/string.rst @@ -206,15 +206,15 @@ literal text, it can be escaped by doubling: ``{{`` and ``}}``. The grammar for a replacement field is as follows: - .. productionlist:: format-string - replacement_field: "{" [`field_name`] ["!" `conversion`] [":" `format_spec`] "}" - field_name: arg_name ("." `attribute_name` | "[" `element_index` "]")* - arg_name: [`identifier` | `digit`+] - attribute_name: `identifier` - element_index: `digit`+ | `index_string` - index_string: <any source character except "]"> + - conversion: "r" | "s" | "a" - format_spec: <described in the next section> +.. productionlist:: format-string + replacement_field: "{" [`field_name`] ["!" `conversion`] [":" `format_spec`] "}" + field_name: arg_name ("." `attribute_name` | "[" `element_index` "]")* + arg_name: [`identifier` | `digit`+] + attribute_name: `identifier` + element_index: `digit`+ | `index_string` + index_string: <any source character except "]"> + + conversion: "r" | "s" | "a" + format_spec: <described in the next section> In less formal terms, the replacement field can start with a *field_name* that specifies the object whose value is to be formatted and inserted @@ -332,30 +332,30 @@ affect the :func:`format` function. The meaning of the various alignment options is as follows: - .. index:: - single: < (less); in string formatting - single: > (greater); in string formatting - single: = (equals); in string formatting - single: ^ (caret); in string formatting - - +---------+----------------------------------------------------------+ - | Option | Meaning | - +=========+==========================================================+ - | ``'<'`` | Forces the field to be left-aligned within the available | - | | space (this is the default for most objects). | - +---------+----------------------------------------------------------+ - | ``'>'`` | Forces the field to be right-aligned within the | - | | available space (this is the default for numbers). | - +---------+----------------------------------------------------------+ - | ``'='`` | Forces the padding to be placed after the sign (if any) | - | | but before the digits. This is used for printing fields | - | | in the form '+000000120'. This alignment option is only | - | | valid for numeric types. It becomes the default for | - | | numbers when '0' immediately precedes the field width. | - +---------+----------------------------------------------------------+ - | ``'^'`` | Forces the field to be centered within the available | - | | space. | - +---------+----------------------------------------------------------+ +.. index:: + single: < (less); in string formatting + single: > (greater); in string formatting + single: = (equals); in string formatting + single: ^ (caret); in string formatting + ++---------+----------------------------------------------------------+ +| Option | Meaning | ++=========+==========================================================+ +| ``'<'`` | Forces the field to be left-aligned within the available | +| | space (this is the default for most objects). | ++---------+----------------------------------------------------------+ +| ``'>'`` | Forces the field to be right-aligned within the | +| | available space (this is the default for numbers). | ++---------+----------------------------------------------------------+ +| ``'='`` | Forces the padding to be placed after the sign (if any) | +| | but before the digits. This is used for printing fields | +| | in the form '+000000120'. This alignment option is only | +| | valid for numeric types. It becomes the default for | +| | numbers when '0' immediately precedes the field width. | ++---------+----------------------------------------------------------+ +| ``'^'`` | Forces the field to be centered within the available | +| | space. | ++---------+----------------------------------------------------------+ Note that unless a minimum field width is defined, the field width will always be the same size as the data to fill it, so that the alignment option has no @@ -364,23 +364,23 @@ meaning in this case. The *sign* option is only valid for number types, and can be one of the following: - .. index:: - single: + (plus); in string formatting - single: - (minus); in string formatting - single: space; in string formatting - - +---------+----------------------------------------------------------+ - | Option | Meaning | - +=========+==========================================================+ - | ``'+'`` | indicates that a sign should be used for both | - | | positive as well as negative numbers. | - +---------+----------------------------------------------------------+ - | ``'-'`` | indicates that a sign should be used only for negative | - | | numbers (this is the default behavior). | - +---------+----------------------------------------------------------+ - | space | indicates that a leading space should be used on | - | | positive numbers, and a minus sign on negative numbers. | - +---------+----------------------------------------------------------+ +.. index:: + single: + (plus); in string formatting + single: - (minus); in string formatting + single: space; in string formatting + ++---------+----------------------------------------------------------+ +| Option | Meaning | ++=========+==========================================================+ +| ``'+'`` | indicates that a sign should be used for both | +| | positive as well as negative numbers. | ++---------+----------------------------------------------------------+ +| ``'-'`` | indicates that a sign should be used only for negative | +| | numbers (this is the default behavior). | ++---------+----------------------------------------------------------+ +| space | indicates that a leading space should be used on | +| | positive numbers, and a minus sign on negative numbers. | ++---------+----------------------------------------------------------+ .. index:: single: z; in string formatting |