我必须找到符号“a..,z”、“A,..,Z”、“空格”、“。” 和“，”在一些数据中。
我已经尝试过代码：
fh = codecs.open("mydata.txt", encoding = "utf-8")
text = fh.read()
fh1 = unicode(text)
dic_freq_signs = dict(Counter(fh1.split()))
All_freq_signs = dic_freq_signs.items()
List_signs = dic_freq_signs.keys()
List_freq_signs = dic_freq_signs.values()
但它让我得到所有迹象而不是我正在寻找的那些？任何人都可以帮忙吗？
（而且它必须是 unicode）
检查字典迭代..
All_freq_signs = [ item for item in dic_freq_signs.items() if item.something == "somevalue"]
def criteria(value):
return value%2 == 0
All_freq_signs = [ item for item in dic_freq_signs.items() if criteria(item)]
Make sure you import string module, with it you can get character ranges a to z and A to Z easily
import string
A Counter(any_string) gives the count of each character in the string. By using split() the counter would return the counts of each word in the string, contradicting with your requirement. So I have assumed that you need character counts.
dic_all_chars = dict(Counter(fh1)) # this gives counts of all characters in the string
signs = string.lowercase + string.uppercase + ' .,' # these are the characters you want to check
# using dict comprehension and checking if the key is in the characters you want
dic_freq_signs = {key: value for key, value in dic_all_chars.items()
if key in signs}
dic_freq_signs would only have the signs that you want to count as keys and their counts as values.