python去除空格,tab制表符和\n换行符的小技巧分享

str="hello world  hi there"
str.replace(" ","")  #将str中的空格用空串替代，str本身不变，只改变显示的结果

import re
str="""
hello  123        world  456

hello  wish you good luck!
"""
print(re.sub('\s|\t|\n','',str))  #\s代表空格，\t代表制表符，\n代表换行符

print(re.sub('\s','',str))

		body1=response.xpath('//body//text()').extract()
        body1=''.join(body1)
        body1 = re.sub('\n', '', body1).replace(' ', '').strip()
        body1=re.sub('\s','',body1)

re.sub('\n', '', body1)

str1 = " String's type is str "
print(str1,end='')
print('end')
print(str1.lstrip(),end='')
print('end')
# String's type is str end
#String's type is str end

str1 = " String's type is str "
print(str1,end='')
print('end')
print(str1.rstrip(),end='')
print('end')

# String's type is str end
# String's type is strend

str1 = " String's type is str "
print(str1,end='')
print('end')
print(str1.strip(),end='')
print('end')

# String's type is str end
#String's type is strend

str1 = " String's type is str "
print(str1,end='')
print('end')
print(str1.replace(' ', ''),end='')
print('end')
# String's type is str end
#String'stypeisstrend

import re
str1 = " String's type is     str "
print(str1,end='')
print('end')
str1=re.sub(r"\s+", "", str1)
print(str1.replace(' ', ''),end='')
print('end')