Regex

#something about regular expression

regarding compile

same meaning.

• with compile

.py

prog = re.compile(pattern)
result = prog.match(string)

• without compile

.py

result = re.match(pattern, string)

If you want to check the regex instantly, use
reg tester.

##Example for reminder
###time with timezone.

1999-04-13 15:00:00+09:00

.re

^\d{4}-\d{2}-\d{2}\ \d{2}:\d{2}:\d{2}\+\d{2}:\d{2}$
^\d{4}-\d{2}-\d{2}\ \d{2}:\d{2}:\d{2}(\+|\-)\d{2}:\d{2}$

###number expression.

2999.5982

.re

^[0-9]+$ # integer, only number no unicode number

^\d+\.\d+$ # real number, number and unicode number

^[-]?¥d+(¥.¥d+)?$ #real, plus/minus, number and unicode
^[-]?[0-9]+(¥.[0-9]+)?$ #real, plus/minus only number,

##special character requiring escape.

, *, +, ., ?, {}, (), [], ^, $, -, |, /