strip 要注意使用

 d = '[123]'

print(d.strip('[]'))

# result

# 123

d = '[]123'

print(d.strip('[]'))

# result

# 123

d = '123[]'

print(d.strip('[]'))

# result

# 123

ddd = '123456'

print(ddd.strip('1256'))

# result

# 34

print(ddd[2:-2])

# result

# 34

dddd = ' 123456 '

print(dddd.strip('1256'))

print(dddd.strip().strip('1256'))

# result

# 123456 

# 34