regex101: Python Substitution Workspace

1st Alternative^[\D]*(?P<from_day>(0?[1-9])|([12][0-9])|3[01])[\.\-\s,■]+(?P<from_month>(0?[1-9])|(1[0-2]))[\.\-\s,■]*(?P<until_day>(0?[1-9])|[12][0-9]|3[01])[\.\-\s,■]+(?P<until_month>(0?[1-9])|1[012])[\D]*$

^start of line

Character Class[\D]*

*matches any number of characters from the set below:

\Dany character that is not a Unicode decimal digit

Group from_day(?P<from_day>(0?[1-9])|([12][0-9])|3[01])

1st Alternative(0?[1-9])

Group 2(0?[1-9])

0?optionally matches the literal 0 (48₁₀ / 60₈ / 30₁₆)

Character Class[1-9]

1-9one character from 1 (49₁₀) to 9 (57₁₀)

2nd Alternative([12][0-9])

Group 3([12][0-9])

Character Class[12]

1the literal 1 (49₁₀ / 61₈ / 31₁₆)

2the literal 2 (50₁₀ / 62₈ / 32₁₆)

Character Class[0-9]

0-9one character from 0 (48₁₀) to 9 (57₁₀)

3rd Alternative3[01]

3the literal 3 (51₁₀ / 63₈ / 33₁₆)

Character Class[01]

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

1the literal 1 (49₁₀ / 61₈ / 31₁₆)

Character Class[\.\-\s,■]+

+matches at least one character from the set below:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\-the literal - (45₁₀ / 55₈ / 2D₁₆)

\sa Unicode whitespace character

,the literal , (44₁₀ / 54₈ / 2C₁₆)

■the literal ■ (9632₁₀ / 22640₈ / 25A0₁₆)

Group from_month(?P<from_month>(0?[1-9])|(1[0-2]))

1st Alternative(0?[1-9])

Group 5(0?[1-9])

0?optionally matches the literal 0 (48₁₀ / 60₈ / 30₁₆)

Character Class[1-9]

1-9one character from 1 (49₁₀) to 9 (57₁₀)

2nd Alternative(1[0-2])

Group 6(1[0-2])

1the literal 1 (49₁₀ / 61₈ / 31₁₆)

Character Class[0-2]

0-2one character from 0 (48₁₀) to 2 (50₁₀)

Character Class[\.\-\s,■]*

*matches any number of characters from the set below:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\-the literal - (45₁₀ / 55₈ / 2D₁₆)

\sa Unicode whitespace character

,the literal , (44₁₀ / 54₈ / 2C₁₆)

■the literal ■ (9632₁₀ / 22640₈ / 25A0₁₆)

Group until_day(?P<until_day>(0?[1-9])|[12][0-9]|3[01])

1st Alternative(0?[1-9])

Group 8(0?[1-9])

0?optionally matches the literal 0 (48₁₀ / 60₈ / 30₁₆)

Character Class[1-9]

1-9one character from 1 (49₁₀) to 9 (57₁₀)

2nd Alternative[12][0-9]

3rd Alternative3[01]

Character Class[\.\-\s,■]+

Group until_month(?P<until_month>(0?[1-9])|1[012])

Character Class[\D]*

$end of line

2nd Alternative(?:.*)

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

Search reference

Regular Expression

^[\D]*(?P<from_day>(0?[1-9])|([12][0-9])|3[01])[\.\-\s,■]+(?P<from_month>(0?[1-9])|(1[0-2]))[\.\-\s,■]*(?P<until_day>(0?[1-9])|[12][0-9]|3[01])[\.\-\s,■]+(?P<until_month>(0?[1-9])|1[012])[\D]*$|(?:.*)

New

28.11 16.12
"13.01 23,09"
01.08.-31.12
"01.01,-51.12"
01.08.-31.12.
01.08.-31.12.
01.01.-31.12.
01.08.-31.12.
01.01.-31.12.
"01,01.-31,12."
01083112
1.02 - 4.3

Substitution

\g<from_day>.\g<from_month>-\g<until_day>.\g<until_month>