PythonStudy——字符串扩展方法 String extension method

print(''.find(''))
print(''.rfind(''))
print('***000123123***'.lstrip('*'))
print('***000123123***'.rstrip('*'))
print('华丽分割线'.center(50,'='))
print('华丽分割线'.ljust(50,'='))
print('华丽分割线'.rjust(50,'='))
print(''.zfill(10))
print('%010d' % 123)
print('000\t123'.expandtabs(30))
print('AbC'.swapcase())

print('四'.isdigit())
print('四'.isdecimal())
print('四'.isnumeric())  # True
print('肆'.isnumeric())  # True
print('Ⅳ'.isnumeric())  # True

print('a_1'.isidentifier())
print('ABCc'.isupper())
print('ABCc'.islower())
print('Aooc Abc Aaa'.istitle())
print(' \n\r\t'.isspace())