ascii ord() chr()

  1. ord()chr(), unichr()相反

    ord('A') : ‘A ‘ —> 65

    ord(u'u2020') : return 8224

    chr(65) : 65 —> A

  2. ASCII code for ‘A’ is 65, ‘a’ is 97

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ord('A')
65

ord('a')
97

chr(65)
'A'

chr(97)
'a'
  1. Note:

    if {A:1, B:2, ….}

    ord('A')-64

    注意最开始A为65,如果设定A为1,则 - 64