Python练习

import re
#a='python 1111java678php'

# r=re.findall('[a-z]{3,6}',a)
# print(r)
# ['python', 'java', 'php']
# Process finished with exit code
#贪婪与非贪婪  python采用贪婪匹配 匹配更多
#非贪婪
# r=re.findall('[a-z]{3,6}?',a)
# print(r)
# ['pyt', 'hon', 'jav', 'php']
# Process finished with exit code 0a
# a='pytho0python1pythonn2'
# # r=re.findall('python{1,2}?',a)
# # print(r)
#['python', 'python']

#验证qq号位数为4-8位
#qq='100000001'
# r=re.findall('^\d{1,9}$',qq)
# print(r)      #结果  ['100000001']


language='pythonc#javac#phpc#'

def convert(value):
    matched=value.group()
    return '!!'+matched+'!!'

r=re.sub('c#',convert,language)

print(r)

# python!!c#!!java!!c#!!php!!c#!!
# 

# Process finished with exit code 0

import re
# s='83C72D1D8E67'
# r=re.match('\d',s)
# print(r)
#
# r1=re.search('\d',s)
# print(r1.group())
# <_sre.SRE_Match object; span=(0, 1), match='8'>
# 8

# s='life is short,i use python'
# r=re.search('life.*python',s)
# print(r.group())
# life is short,i use python

# s='life is short,i use python'
# r=re.search('life(.*)python',s)
# print(r.group(1))
#is short,i use

s='life is short,i use python, i love python'
r=re.search('life(.*)python(.*)python',s)
#print(r.group(0,1,2))
('life is short,i use python, i love python', ' is short,i use ', ', i love ')

print(r.groups())
(' is short,i use ', ', i love ')