# ### 预定义字符集

# \d 匹配数字

strvar = "sdfsdf*(&*(&(2ui3"

lst = re.findall("\d",strvar)

print(lst)

# \D 匹配非数字

strvar = "sdfsdf*(&*(&(2ui3"

lst = re.findall("\D",strvar)

print(lst)

# \w 匹配字母数字下划线

strvar = "sadf*)(*_)456你你好"

lst = re.findall("\w",strvar)

print(lst)

# \W 匹配非字母或数字或下划线

strvar = "sadf*)(*_)456你你好"

lst = re.findall("\W",strvar)

print(lst)

# \s 匹配任意的空白符 (\n \t \r ' ')

strvar = "                      "

lst = re.findall("\s",strvar)

print(lst)

# \S 匹配任意非空白符

strvar = "    abdd                         "

lst = re.findall("\S",strvar)

print(lst)

# \n 匹配一个换行符

strvar = """

"""

lst = re.findall(r"\n",strvar)

print(lst)

# \t 匹配一个制表符

strvar = """

"""

lst = re.findall(r"\t",strvar)

print(lst)