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re for pikaScript
This module is made for pikaScript, aiming at providing the same usage as the re module in Python.
import module
import re
usage
The functions in this module have almost the same name and usage as the functions in the re module in python, but some features in the python.re module are not avaliable here, pikaScript does not support default arguments for example.
Here we provide some demonstration programs.
match
import re
line = "Cats are smarter than dogs"
m = re.match( '(.*) are (.*?) .*', line, re.M|re.I)
if m:
print("matchObj.group(0) : ", m.group(0))
print("matchObj.group(1) : ", m.group(1))
print("matchObj.group(2) : ", m.group(2))
else:
print("No match!!")
'''>> runing output
matchObj.group(0) : Cats are smarter than dogs
matchObj.group(1) : Cats
matchObj.group(2) : smarter
'''
search
print(re.search('www', 'www.runoob.com').span(0))
print(re.search('com', 'www.runoob.com').span(0))
'''>> running output
[0, 3]
[11, 14]
'''
sub
phone = "2004-959-559 # this is a phone number"
num = re.sub('#.*$', "", phone)
print("the phone number is: ", num)
num = re.sub('\\D', "", phone)
print("the phone number is: ", num)
'''>> running output
the phone number is: 2004-959-559
the phone number is: 2004959559
'''
findall
# year-month-day
pattern = re.compile('(\\d{4})-([1-9]|1[0-2])-([1-9]|[1-2][0-9]|3[01])\\b')
s = 'date: 2020-1-1, 2022-12-22, 2018-3-31. Wrong format: 2031-13-31, 2032-12-33 ...'
result1 = pattern.findall(s)
print(result1)
result2 = pattern.sub('\\1',s)
print(result2)
'''>> running output
[['2020-1-1', '2020', '1', '1'], ['2022-12-22', '2022', '12', '22'], ['2018-3-31', '2018', '3', '31']]
date: 2020, 2022, 2018. Wrong format: 2031-13-31, 2032-12-33 ...
'''
the API
This module prototype are likes this:
# flags
A: int
ASCII: int
I: int
IGNORECASE: int
M: int
MULTILINE: int
S: int
DOTALL: int
class Pattern:
def __init__(self):
pass
def __del__(self):
pass
def findall(self, subject: str, *flags) -> list:
pass
def sub(self, repl: str, subjet: str, *count__flags) -> str:
pass
def subn(self, repl: str, subjet: str, *count__flags) -> list:
pass
def match(self, subject: str, *flags) -> Match:
pass
def fullmatch(self, subject: str, *flags) -> Match:
pass
def search(self, subject: str, *flags) -> Match:
pass
def split(self, subject: str, *maxsplit__flags) -> list:
pass
class Match:
def __init__(self):
pass
def __del__(self):
pass
def group(self, *n) -> str:
pass
def groups(self) -> list:
pass
def span(self, *group_n) -> list:
pass
def findall(pattern: str, subject: str, *flags) -> list: ...
# def sub(pattern, repl, string, count=0, flags=0)
def sub(pattern: str, repl: str, subjet: str, *count__flags) -> str: ...
def match(pattern: str, subject: str, *flags) -> Match: ...
def fullmatch(pattern: str, subject: str, *flags) -> Match: ...
def search(pattern: str, subject: str, *flags) -> Match: ...
def compile(pattern: str, *flags) -> Pattern: ...
def escape(pattern: str) -> str: ...
# def subn(pattern, repl, string, count=0, flags=0)
def subn(pattern: str, repl: str, subjet: str, *count__flags) -> list: ...
# def finditer(pattern: str, subject: str, *flags):
def split(pattern: str, subject: str, *maxsplit__flags) -> list: ...