自学笔记：正则表达式入门

#正则表达式练习
import re

print(r'?的用法0-1')
a=re.sub(r"eat?","*","I like eat , ea , eatt ,flowers")
print(a)

print(r'*的用法0-无穷')
a=re.sub(r"eat*","*","I like ea, eat, eatt, eatttt flowers")
print(a)

print(r'+的用法1-无穷')
a=re.sub(r"eat+","*","I like ea, eat, eatt, eatttt flowers")
print(a)

print(r'{n}的用法1-无穷')
a=re.sub(r"eat{2}","*","I like ea, eat, eatt, eattt eatttt flowers")
print(a)
a=re.sub(r"eat{2,}","*","I like ea, eat, eatt, eattt eatttt flowers")
print(a)
a=re.sub(r"eat{2,3}","*","I like ea, eat, eatt, eattt eatttt flowers")
print(a)

print(r'()的用法')
a=re.sub(r"(eat)+","*","I like ea, eat, eatt, eattt flowers")
print(a)

print(r'.的用法')
a=re.sub(r".","*","I like ea, eat, eatt, eattt flowers")
print(a)

print(r'\.的用法')
a=re.sub(r"\.","*","I like ea, . eat, eatt, eattt flowers")
print(a)

print(r'|的用法')
a=re.sub(r"a|t","*","I like ea, . eat, eatt, eattt flowers")
print(a)

print(r'[]的用法')
a=re.sub(r"[ies]","*","I like ea, . eat, eatt, eattt flowers")
print(a)

print(r'[^]的用法')
a=re.sub(r"[^ies]","*","I like ea, . eat, eatt, eattt flowers")
print(a)

print(r'匹配单词的变形')
a=re.sub(r"(es)+","*","I do does his dlad")
print(a)