# 如何去掉字符串中不需要的字符
s = ' abc 123 '
print(s.strip())
print(s.lstrip())
print(s.rstrip())
s = '----abc+++++'
print(s.strip('-+'))
s = 'abc:123'
print(s[:3] + s[4:])
s = '\tabc\t123\txyz'
print(s)
print(s.replace('\t', ''))
s = '\tabc\t123\txyz\ropq'
import re
print(re.sub('[\t\r]', '', s))
s = 'abc1230323xyz'
# 一一对应替换字符
sMap = str.maketrans('abcxyz', 'xyzabc')
print(sMap)
print(s.translate(sMap))