python - 如何用Python查找字符串中的中文或日语字符？

如:

str = 'sdf344asfasf天地方益3権sdfsdf'

在中文和日语字符中添加():

strAfterConvert = 'sdfasfasf(天地方益)3(権)sdfsdf'

最佳答案

首先，您可以检查字符是否在以下unicode块之一中:

Unicode Block 'CJK Unified Ideographs'-U + 4E00至U + 9FFF

Unicode Block 'CJK Unified Ideographs Extension A' -U + 3400到U + 4DBF

Unicode Block 'CJK Unified Ideographs Extension B'-U + 20000到U + 2A6DF

Unicode Block 'CJK Unified Ideographs Extension C'-U + 2A700到U + 2B73F

Unicode Block 'CJK Unified Ideographs Extension D'-U + 2B740至U + 2B81F

之后，您需要做的就是遍历字符串，检查char是中文，日文还是韩文(CJK)并相应地追加:

# -*- coding:utf-8 -*-
ranges = [
  {"from": ord(u"\u3300"), "to": ord(u"\u33ff")},         # compatibility ideographs
  {"from": ord(u"\ufe30"), "to": ord(u"\ufe4f")},         # compatibility ideographs
  {"from": ord(u"\uf900"), "to": ord(u"\ufaff")},         # compatibility ideographs
  {"from": ord(u"\U0002F800"), "to": ord(u"\U0002fa1f")}, # compatibility ideographs
  {'from': ord(u'\u3040'), 'to': ord(u'\u309f')},         # Japanese Hiragana
  {"from": ord(u"\u30a0"), "to": ord(u"\u30ff")},         # Japanese Katakana
  {"from": ord(u"\u2e80"), "to": ord(u"\u2eff")},         # cjk radicals supplement
  {"from": ord(u"\u4e00"), "to": ord(u"\u9fff")},
  {"from": ord(u"\u3400"), "to": ord(u"\u4dbf")},
  {"from": ord(u"\U00020000"), "to": ord(u"\U0002a6df")},
  {"from": ord(u"\U0002a700"), "to": ord(u"\U0002b73f")},
  {"from": ord(u"\U0002b740"), "to": ord(u"\U0002b81f")},
  {"from": ord(u"\U0002b820"), "to": ord(u"\U0002ceaf")}  # included as of Unicode 8.0
]

def is_cjk(char):
  return any([range["from"] <= ord(char) <= range["to"] for range in ranges])

def cjk_substrings(string):
  i = 0
  while i<len(string):
    if is_cjk(string[i]):
      start = i
      while is_cjk(string[i]): i += 1
      yield string[start:i]
    i += 1

string = "sdf344asfasf天地方益3権sdfsdf".decode("utf-8")
for sub in cjk_substrings(string):
  string = string.replace(sub, "(" + sub + ")")
print string

以上打印品

sdf344asfasf(天地方益)3(権)sdfsdf

为了适应 future 发展，您可能需要注意CJK Unified Ideographs ExtensionE。它将为ship with Unicode 8.0，即scheduled for release in June 2015。我已经将其添加到范围中，但是在Unicode 8.0发布之前，您不应该包括它。

[编辑]

添加了CJK compatibility ideographs，Japanese Kana和CJK radicals。

关于python - 如何用Python查找字符串中的中文或日语字符？，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/30069846/