fresh for me

1.chr()       ascii码-->数值

与此相对

ord（）     数值-->ascii码

print(chr(112))
---p
print(ord('p'))
---112

2.np.random.permutation()

对括号里的值或列表，随机排序

import numpy as np
a=np.random.permutation(6)
print(a)
---->[3 2 4 0 1 5]

import numpy as np
a=np.random.permutation([1,2,3,4,5,6])
print(a)
---->[3 2 6 5 1 4]

3.import unicodedata

unicodedata.categary(str)

返回str在UNICODE里的分类类型

[Cc] Other, Control

[Cf] Other, Format

[Cn] Other, Not Assigned (no characters in the file have this property)

[Co] Other, Private Use

[Cs] Other, Surrogate

[LC] Letter, Cased

[Ll] Letter, Lowercase

[Lm] Letter, Modifier

[Lo] Letter, Other

[Lt] Letter, Titlecase

[Lu] Letter, Uppercase

[Mc] Mark, Spacing Combining

[Me] Mark, Enclosing

[Mn] Mark, Nonspacing

[Nd] Number, Decimal Digit

[Nl] Number, Letter

[No] Number, Other

[Pc] Punctuation, Connector

[Pd] Punctuation, Dash

[Pe] Punctuation, Close

[Pf] Punctuation, Final quote (may behave like Ps or Pe depending on usage)

[Pi] Punctuation, Initial quote (may behave like Ps or Pe depending on usage)

[Po] Punctuation, Other

[Ps] Punctuation, Open

[Sc] Symbol, Currency

[Sk] Symbol, Modifier

[Sm] Symbol, Math

[So] Symbol, Other

[Zl] Separator, Line

[Zp] Separator, Paragraph

[Zs] Separator, Space